Betel Leaf Power: Natural Defense Against Acinetobacter Infections | InformativeBD

Effectiveness of Piper betel leaf extracts against Acinetobacter species isolated from bronchitis and pharyngitis patients

Sehr Syed, Umair Azmat,  Shaista Ilyas,  Arslan Fazal,  Tanzeela Murmim,  Fakhra Riaz, Maryam Khan, and Saba Shamim,  from the institute of Pakistan. wrote a Research Article about, "Betel Leaf Power: Natural Defense Against Acinetobacter Infections. Entitled, Effectiveness of Piper betel leaf extracts against Acinetobacter species isolated from bronchitis and pharyngitis patients. This research paper published by the International Journal of Biosciences | IJB. an open access scholarly research journal on Biosciences. under the affiliation of the International Network For Natural Sciences| INNSpub. an open access multidisciplinary research journal publisher.

Abstract

Acinetobacter species is associated with healthcare-associated infections especially chronic cough and other related complications. They are becoming increasingly antibiotic resistant. In the present work, the antimicrobial activity of different extract (water, ethanol, methanol, and chloroform) of Piper betel leaves were tested against Acinetobacter sp. SZ-1 and Acinetobacter baumanii TM-1 isolated from clinical samples collected from the patients suffering from pharyngitis, bronchitis and sore throat. For the antibacterial activity, different plant extracts were used in which Piper betel leaf stand out to be the most effective. Six solvents were used for this study in which only chloroformic extract showed the zones of inhibition. TLC analysis showed five spots with Rf 0.896,0.973,0.747,0.574 and 0.482. SDS-PAGE revealed proteins of different molecular weight when the bacterial cells were treated with ethanolic extract. It was also confirmed by Bradford analysis. GCMS analysis depicted different bioactive compounds including phytol; phenol,2,2-methylenebis[6-(1,1-dimethylethyl)-4-methyl; spirost-8-en-11-one,3-hydroxy-,(3β,5α,14β,20β,22β,25R) and 2,2,4-trimethyle-3-(3,8,12,16-tetramethyl-heptadeca-3,7,11,15-tetraenyl)-cyclohexanol. Furthermore, in silico analysis can enhance the existing knowledge about establishing the significance of P. betel leaves as an effective drug to treat the acute and chronic upper respiratory tract infections.

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Introduction

The genus Acinetobacter was discovered in the eighteenth century when it was considered as a pathogen of the soil (Doughari et al., 2011). Since its discovery, the genus and its originating species have long been characterized and re-characterized under many genera, before being finally distinguished from other closely affiliated (on the basis of morphological and genetic grounds) genera (Jung and Park, 2015). The species belonging to this genus are reported to be aerobic, Gram negative in their Gram morphology and are typically present in the form of pairs or chains. Their growth characteristics and morphological patterns are highly dependent upon the type of media used for their isolation. Although the genus is home to many species, the most commonly known, studied and well identified species of the genus is Acinetobacter baumanii. It is usually found to inhabit water bodies and soil, but is also typically found in healthcare settings, environments and medical equipment (Villegas and Hartstein, 2003). There have been various studies that report the incidence of multidrug resistant A. baumanii, which has been the causative agent of many nosocomial and hospital acquired infections in European countries (Kamolvit et al., 2015). Over the years, it has emerged as a serious pathogen, as being reported as the causative agent of many skin, tissue, wound, and blood infections, sepsis, meningitis, and hospital acquired pneumonia (Howard et al., 2012). A. baumanii responsible for hospital acquired infections are usually isolated from different environmental settings like hospital walls, roofs, beddings, curtains, medical equipment, door knobs and handles, bin stands, as well as dispensers. It has the ability to sustain on living and non-living sources for long periods of time, and its persistence in hospitals and healthcare facilities is the leading factor behind its resistance to antibiotics and other disinfectants (Evans et al., 2013). It mainly targets exposed tissues and organs like the mucous membranes and those areas which have been exposed open by any trauma or wound injury (Sebeny et al., 2008). These infections can take a turn for the worse if these are left untreated, by leading to septicemia and eventual death (Howard et al., 2012). The other reason may be the exposure to the pathogen and its acquiring from environment of the infected hospital as well as the exposure and contact of the healthcare personnel with an infected patient (RodríguezBaño et al., 2009). The other species of Acinetobacter such as A. pittii and A. nosocomialis also cause infection in the patients of intensive care unit that is reported around the world while A. calcoaceticus causes bacteremia and pneumonia. The other species like A. lwoffii, and A. junii also have been observed to cause infections in patients with compromised immune systems (AlAtrouni et al., 2016). The affected groups of people can range from all age periods and ranges, but A. baumannii can particularly affect those people who are hospitalized and are immunocompromised, which may or may not be hospitalized. The patients who have a protracted stay at the hospitals are also susceptible to infection. Interestingly enough, the peculiar group with an increased risk of its infection are the soldiers and the armed forces who have been sent to conflicted war zones, especially those environments which are dry and humid. The desert areas provide an ideal setting for its growth which is reported to be the main causative agent of infection in wounded armed personnel (CDC, 2004).

The incidence of multiple drug resistant A. baumannii is usually reported in patients which are kept in the ICU of hospitals, where the estimated fatality rate is often high (Seifert et al., 1995). Therefore, it is often difficult to ascertain the fatality strictly related to it, and not depending upon the patients‟ other root causes of disease. However, it would not be wrong to say that the presence of A. baumannii certainly elevates the risk of high fatality (Abbo et al., 2007).

The other probable cause in the case of A. baumannii is that it acts as a biomarker or a precursor of an increased rate of mortality in the case of bacterial infections associated with patients admitted under critical care in hospitals (Eliopoulos et al., 2008).

The use of plants in the form of drugs has been in use since the advent and enlightenment of disease. The origin of this phenomenon is most probably the result of basic instinct and interest, as the case with animals and their first interaction with humans as a food source. The knowledge was beginning to take shape at the time, in the light of inadequate information regarding the pathogenesis of disease and the use of plants as their cure. The passage of time resulted in the discovery of specific plants which were solely used for the treatment of specific diseases (Petrovska, 2012). The medicinal plants may be defined as those plants that have been associated with herbal treatments since ancient and recent times, for the treatment of established and new infections and diseases, as well as for use in simple herbal and therapeutic concoctions that provide relief against simple ailments like insect bites, headache, nausea etc (Schulz et al., 2001).

There have been many plants that are reported for their beneficial properties, countless therapeutic and commercial applications, due to which they have been in use since ancient times, long before their beneficial properties were scientifically proven and researched about. Piper betel (Piper betle Linn.) plant is one such example. It is one of the most widely known and used plants worldwide. It belongs to the family of Piperaceae, which is known by various names across many countries of the world. It is known as „ikmo‟ in the Philippines, where it is largely cultivated (Quisumbing, 1978). It is also grown in many other Asian countries like China, Taiwan, India, Pakistan, Indonesia and Malaysia (Guha, 2006). It has been reported to be effective against various bacterial strains like: Bacillus cereus, Enterococcus faecalis, Listeria monocytogenes, Micrococcus luteus, Staphylococcus aureus, Aeromonas hydrophila, Escherichia coli, Salmonella Enteritidis, Pseudomonas aeruginosa, Streptococcus mutans (Khan and Kumar, 2011), Enterococcus faecium, Actinomycetes viscosus, Streptococcus sanguis, Fusobacterium nucleatum as well as Prevotella intermedia and Streptococcus pyogenes (Datta et al., 2011).

The aims of the current study were to find the Acinetobacter species associated with pharyngitis, bronchitis and sore throat. The biochemical and molecular characterization of Acinetobacter sp., screening of the medicinal plants against it, selection of the medicinal plant on the basis of its bioactivity, thin layer chromatography (TLC), qualitative and quantitative assays of proteins, estimation of antioxidative enzymes including superoxide dismutase (SOD), peroxidase (POX), ascorbate peroxidase (APOX), glutathione reductase (GR), catalase (CAT) and gas chromatography mass spectrophotometry (GC-MS) will be ascertained.

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Nitrogen Done Right: Boosting Cotton Growth and Yield | InformativeBD

Role of proper management of nitrogen in cotton growth and development

Nangial Khan, Yingchun Han, Zhanbiao Wang, Guoping Wang, Lu Feng, Beifang Yang, and Yabing Li, from the institute of China. wrote a Research Article about, Nitrogen Done Right: Boosting Cotton Growth and Yield. Entitled, Role of proper management of nitrogen in cotton growth and development. This research paper published by the International Journal of Biosciences | IJB.  an open access scholarly research journal on Biosciences. under the affiliation of the International Network For Natural Sciences| INNSpub. an open access multidisciplinary research journal publisher.

Abstract 

Cotton is important cash crop grown for fiber. Cotton fiber is used in fabrics and other things used in daily life. The production of many industries in the world and, especially in china is related to fiber. Proper nutrition plays great role in growth and high-quality fiber production. Different macro and micro nutrients are applied to cotton for high quality fiber production. Nitrogen is the highly utilizing nutrient among that. High growth, yield and quality of cotton depend on proper management of nitrogen. Due to increasing prices of nitrogen fertilizers researchers are working to increase nitrogen use efficiency (NUE) of cotton to benefit farmers. Nitrogen is applied through different methods at different rates. Mostly split application at PPA (Pre plant application), FBA (First bloom application) and PBA (Peak bloom application) with different rates according to soil and plant condition are in practice by farmers. Many organic and inorganic sources of nitrogen are available with different properties. NUE is affected by different factors like genotype, cropping system, soil, volatilization and leaching, N amount application and fertilizer timing. Prior to nitrogen fertilizer application nutrient status of soil must be analyzed to prevent nitrogen losses from the system. Different methods like soil testing, tissue testing, Leaf area index (LAI), normalize difference vegetation index (NDVI) and satellite imagery are suggested to improve NUE. Many researches proved that proper management of nitrogen increase farmers profit and NUE. This review highlights nitrogen response to cotton growth, yield, quality, NUE and factors affecting NUE and how to improve NUE through nitrogen management. 

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Introduction

Cotton (Genus Gossypium) is a leading cash crop and is considered as “white gold and cultivated in above 80 countries all over the world (Maiti et al., 2012). According to International cotton Advisory Committee 2015 report cotton production in Asia and America is more than 80% of total world production while Asia is largest cotton producing continent of the world by producing 70% cotton of the world (Zhang and Dong, 2019). Cotton species are grouped according to their ploidy in diploids and tetraploids. Diploids (2n = 2x = 26) include Gossypium herbaceum L. and Gossypium arboreum L. while Tetraploids (2n = 4x = 52) have Gossypium barbadense L. and Gossypium hirsutum L. The world 95% or more cotton production is from Gossypium baradense L. and Gossypium hirsutum L. species (Smith and Cothren, 1999; Zhang et al., 2008). Gossypium hirsutum is also known as upland cotton, American and Mexican cotton which contribute more than 90% in cotton production while Gossypium barbadense contribute about 5% to cotton production and is also known as Egyptian or Pima cotton (OECD 2010). Cotton is perennial but commercially it is grown as annual crop and have indeterminate growth. Cotton is the unique crop which provide vegetable oil and clothes to humans, chaff for livestock feed, organic matter to soil and many other products to industries (Abdurakhmonov 2018). Currently more than half of clothes people wear is made of cotton fiber (Zhang and Dong, 2019).

Cotton needs different macro and micro nutrients for better growth and yield. Nitrogen is the first important macronutrient in agriculture production and its fertilization is necessary for good production of cotton (Hou et al., 2007). Nitrogen is one of the most limiting factor in cotton production (Arnall and Boman, 2019). N cost more in cotton production as compared to other fertilizers (Chaudhry 2007). Total fertilizer demand of the world increases 1.8% per year from 2014-2018 (FAO, 2015). Plants utilize nitrogen in the form of NO3 - and NH4 +. It is the element which greatly contribute to growth of plant and increase yield and quality of crop (Laghari et al., 2016).

Nitrogen enhances photosynthesis and leaf growth and result in increase of vegetative growth. Nitrogen reduction effect boll production due to premature senescence (Dong et al., 2012). Nitrogen deficiency first appears on older leaves.

The main deficiency symptoms of cotton are chlorosis due to main part of chlorophyll molecule (Fig. 1). It reduces growth of cotton and mostly plants remain stunted. N deficiency also negatively affect yield of cotton. Shedding of bolls in first 10-12 days after flowering shows deficiency of nitrogen. Shortened of fruiting branches, reddening of middle canopy at late season, short flowering period, enhance leaf senescence and reduction in boll retention at late season are symptoms of nitrogen deficiency in cotton.

In cotton farming, Nitrogen fertilizer was mostly applied in three splits at field preparation, early flowering and peak bloom stage but it rates are different from region to region, cultivar to cultivar and soil type (Fritschi et al., 2003; Yang et al., 2011; Boquet and Breitenbeck, 2015).

Many researchers are working to find the nitrogen efficient variety of cotton (Zhang et al., 2018) and reduces nitrogen split application and amount without decreasing the yield.

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Pollination efficiency of Braunsapis sp. (Hymenoptera: Apidae) on Helianthus annuus L. (Asteraceae) flowers at Dang (Ngaoundéré, Cameroon)

Faïbawa Esaïe, Dounia, Fameni Tope Sidonie, Otiobo Atibita Esther Nadine, Tchuenguem Fohouo and Fernand-Nestor, from the institute of Cameroon. wrote a Research Article about, Ginkgo Beyond Borders: How Its Pollen Adapts in Egypt. Entitled, Pollination efficiency of Braunsapis sp. (Hymenoptera: Apidae) on Helianthus annuus L. (Asteraceae) flowers at Dang (Ngaoundéré, Cameroon). This research paper published by the International Journal of Agronomy and Agricultural Research |IJAAR. an open access scholarly research journal on Agronomy. under the affiliation of the International Network For Natural Sciences| INNSpub. an open access multidisciplinary research journal publisher.

Abstract

This research was carried out to evaluate the impact of Braunsapis bees on fruit and seed yields of sunflower in an experimental field from June to July in 2016 and 2017 at Dang. Observations were made on 540 capitula divided in four treatments: two treatments differentiated according to the presence or absence of protection of capitula regarding Braunsapis sp. and other insect visits; the third with capitula protected and uncovered when florets were opened, to allow Braunsapis sp. visits and the fourth with capitula destined to opening and closing without the visit of insects or any other organism. Bee’s daily rhythm of activity, its foraging behavior on flowers and its pollination efficiency were evaluated. Results show that, Braunsapis sp. foraged on H. annuus flowers throughout its whole blooming period. Among 33 insect species recorded on H. annuus capitula, Braunsapis sp. ranked third accounting for 7.63 % all visits, after Apis mellifera (76.06%) and Ceratina sp. (10.79%). On florets, individual bees intensely harvested nectar and slightly collected pollen. The mean duration of a visit per floret was 3.79 sec for nectar harvest visits and 9.94 sec for pollen collection visits. For the two years, through its pollination efficiency on H. annuus, Braunsapis sp. has increased the fruiting rate by 52.67%, the percentage of fruit with seed by 39.50% and the percentage of normal seeds by 73.51%. Hence, conservation of Braunsapis sp. nests close to H. annuus fields is recommended to improve pod and seed production in the region.

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Introduction

Flowers are the reproductive organs of many plant species where seeds are formed (Abrol, 2012). For the cycle to begin, a pollen grain, which is often carried on an insect, comes in contact with the stigma of the flower of the same plant species (Abrol, 2012). Fruits, vegetables or seed production from 87 of the 115 leading global food crops depends upon animal pollination (Klein et al., 2007). The inseparable relation between flowers and bees has led to the coevolution and diversity of species that we currently know (Benachour, 2008).

Helianthus annuus is native of North America (Plant Biosafety Office, 2005). This crop is ideal for cultivation in any season because of its wider adaptability, drought tolerance, short life cycle, photo and thermal insensitivity characteristics (Krishna et al., 2014). It is cultivated primarily for its seeds, which yield the world’s second most important source of edible oil (Plant Biosafety Office, 2005; Dwivedi and Sharma, 2014). The seed oil, shoots, and herb tincture have been employed for anti-inflammatory, antipyretic, diuretic, stimulant and vermifuge purpose (Dwivedi and Sharma, 2014). Florets produce of nectar and pollen and are visited by insects (Vimla et al., 2013). In Kenya, Honeybee pollination increases sunflower seed yield by 30% and oil content by more than 6% (Kasina et al., 2007). They are important flower visitors not only in Kenya (Kasina et al., 2007) but also, in Turkey (Oz et al., 2009), Cameroon (Tchuenguem et al., 2009b), Israël (Pisanty et al., 2013), India (Vimla et al., 2013) and Sudan (Osman and Siham, 2015). Non-Apis bees are also known to visit sunflower and have been reported to improve crop yield by enhancing efficiency of Apis mellifera (De Grandi and Watkins, 2000; Greenleaf and Kremen, 2006).

In Africa in general and in Cameroon in particular, the demand in seed oil of sunflower is very highly whereas its seed yields is weak because notably of the insufficiency of knowledge on the relations between this plant and the anthophilous insects in many agro ecological zones.

Numerous studies to identify pollinating sunflower fauna show that Apis mellifera is the main pollinator of this crop (Kasina et al., 2007; Nderitu et al., 2008; Oz et al., 2009; Vimla et al. 2013; Pysanty et al., 2013; Osman and Siham, 2015). Other Apoids such as bumblebees visit sunflower flowers and participate in their pollination (Lecomté, 1962).

To our knowledge, the data published after detailed studies on the interactions between insects and H. annuus are those of Pham-Delègue et al. (1985) in Bulgaria, Ahmed et al. (1989) in Soudan, Phillipe (1991) in America, Roubik (2000) in Pakistan, Oz et al. (2009) in Turkey, Tchuenguem et al. (2009b) in Ngaoudéré (Cameroon), Vimla et al. (2013) in India, Pisanty et al. (2014) in Israel. In all these investigations, the foraging behavior and pollination activity was carried out in detail only on A. mellifera. The flowering entomofauna and the impact of insects on pollination and fruit and/or seed yields of a plant species may vary with the species of insect, time and space (Michener, 2000; Gallai et al., 2009). Hence there is a need of other studies in the Adamaoua region, to supplement existing data. The general objective of this work is to contribute to the understanding of the relationships between H. annuus and Braunsapis sp., for their optimal management. Specific objectives were to: (a) determine the place of Braunsapis sp. in the H. annuus floral entomofauana; (b) study the activity of this Apidae on florets of this Asteraceae; (c) evaluate the impact of the flowering insects including Braunsapis sp. on pollination and fruit and seed yields of H. annuus; (d) estimate the pollination efficiency of Braunsapis sp. on this plant species.

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Article souirce : Pollination efficiency of Braunsapis sp. (Hymenoptera: Apidae) on Helianthus annuus L. (Asteraceae)flowers at Dang (Ngaoundéré, Cameroon) 

Radiation and Seeds: How Gamma Doses Influence Jatropha Germination | InformativeBD

Enhancement of metabolic spectrum and antibacterial activity of endophytic fungi using antibiotics as inducers

Abdul Haleem, Sajid Iqbal, Kashif Latif, Muniba Jadoon, Nighat Fatima, and Safia Ahmed, from the institute of Pakistan. wrote a Research Article about, Radiation and Seeds: How Gamma Doses Influence Jatropha Germination. Entitled, Enhancement of metabolic spectrum and antibacterial activity of endophytic fungi using antibiotics as inducers. This research paper published by the International Journal of Biosciences | IJB. an open access scholarly research journal on Biosciences. under the affiliation of the International Network For Natural Sciences| INNSpub. an open access multidisciplinary research journal publisher.

Abstract

Natural resources associated with production of bioactive compounds are getting immense importance in therapeutic fields due to concerns like increasing antibiotic resistance. Endophytic fungi are promising natural source to produce antibacterial agents. In this study, metabolic potential of two endophytic fungi, Epicoccum nigrum NFW1 (JX402049.1) and Chaetomium sp. NFW8 (KC797170.1), was evaluated using antibiotics (moxifloxacin and clarithromycin) as inducers. Fungal species were under standard cultivation conditions in media supplemented with and without antibiotics. Following incubation, ethyl acetate extract was analysed for antibacterial activity and probable shift in metabolic profile, induced by antibiotics, by high performance liquid chromatography. The results were further verified by thin layer chromatography, bioautography and Fourier Transform Infra-red spectroscopy. In response to antibiotics, endophytic fungi expressed changes in metabolic spectrum. These variations were manifested as phenotypic changes in the growth pattern as indicated by loss of colour by NFW8. Metabolic profiling revealed additional peaks in extracts of media obtained under presence of antibiotics. Considerable changes in antibacterial activity were noted in samples grown in the presence of antibiotics as compared to those grown without antibiotics. This study showed that selective modification of cultivation medium using antibiotics under OSMAC approach could extend the metabolic spectrum of the endophytic fungi in a promising and cost-effective fashion.

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Introduction

Since the discovery of penicillin, chemical scaffolds obtained from varied natural sources have been cherished for the development of potent drugs. Given the alarming increase in antibiotic resistance worldwide, emerging and re-emerging infectious diseases and life-threatening complications (Khalil et al., 2017), there is a general call for natural product discovery leading to effective therapeutics. Among natural sources, endophytic microorganisms are known to harbor novel and potent biochemical entities (Arnold, 2007). These ubiquitous microorganisms reside asymptomatically within the intracellular spaces of higher plants and are often considered as under explored producers of chemical leads like paclitaxel or taxol (Gunatilaka, 2006).

Over the years, several different strategies have been adopted to fast track the discovery of new and novel chemical structures from natural sources including endophytic microorganisms. In addition to exploring microbial sources from novel niches and habitats, several strategies like dereplication, in-silico studies, genome mining, metabolic engineering, mathematical and statistical modeling have been employed for bioprospecting new compounds (Scherlach and Hertweck, 2009; Teixeira et al., 2019). Additionally, it has been reported that production of biochemical entities by microorganisms is highly influenced by cultivation conditions since many of biosynthetic gene clusters responsible for secondary metabolite production remain unexpressed under standard cultivation conditions (Kusari et al., 2012; Daletos et al., 2017; Ariantari et al., 2019). Therefore, varied approaches are adopted to enhance the biosynthetic potential of microbes. One such methodology is systemic alteration of easily accessible cultivation parameters for extending biosynthetic potential of a particular strain (Bode et al., 2009). This approach is termed as one strain many compounds (OSMAC) approach and involves selective modification of fermentation parameters such as cultivation media, operational parameters (pH, temperature, etc.) and addition of inducer or chemical elicitors (Bode et al., 2009).

The Northern areas of Pakistan are considered a biodiversity hotspot. The endophytic fungi associated with the medicinal plant Taxus fuana of the Himalayan region have been investigated earlier for potential chemo preventive and bioactive compounds with promising findings (Jadoon et al., 2015; Fatima et al., 2016). As part of our ongoing investigations on indigenous endophytes, this study was proposed to extend and reveal the hidden biosynthetic potential of the isolates using OSMAC approach. Therefore, we cultivated the strains by selective modification of the cultivation media and added antibiotics as elicitors of bioactive secondary metabolites. These cost-effective modifications appear instrumental in activating cryptic biosynthetic gene clusters and detecting additional lead compounds which would otherwise be overlooked.

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