%20of%20shoot,%20root.JPG "a, b and c aqueous extracts (AE) of shoot, root and whole plant, respectively and d is control.")
Ebrahim Benyas, Mohsen Aghaz, Ozra Sadat Khatamian Oskooei, Saied Zehtab Salmasi and Yaghub Raii, from the institute of Iran.
wrote a Research article about, Allelopathic Impact of Redroot Pigweed on
Summer Savory. Entitled, Allelopathic effects of aqueous extracts of different
organs of redroot pigweed (Amaranthus retrofelexus L.) on summer savory
(Satureja hortensis L.). This research paper published by the International Journal of Biosciences | IJB. an open access scholarly research journal
Biosciences. under the affiliation of the International Network For
Natural Sciences| INNSpub. an open access multidisciplinary research
journal publisher.
Abstract
In order to demonstrate
the allelopathic effects of different organs (root, shoot and whole plant) of
redroot pigweed (Amaranthus retrofelexus L.) on germination, emergence,
growth and development of summer savory (Satureja hortensis L.) under
laboratory and greenhouse conditionan experiment was carried out as CRD design
with nine and five replications at laboratory and greenhouse of the Faculty of
Agriculture, University of Tabriz, Iran, respectively. Results showed the
significant effects of different organs aqueous extracts (AEs) of redroot
pigweed on germination percentage, germination rate and normal seedlings
percentage. Germination rate decreased by shoot, root and whole plant AEs
compare with control. Shoot and whole plant AEs of redroot pigweed were able to
reduce summer savory biomass more than the root aqueous extract.
Read more : Morphological & Genetic Adaptation in Amaranthus spinosus | InformativeBD
Introduction
Weeds are the most
severe and widespread biological constraint to crop production and cause
invisible damage till the crop is harvested. Weeds are undesirable plants which
compete with main crops in the growth media for nutrients, moisture, space,
light and hamper the healthy growth ultimately reducing the growth and yield
both qualitatively and quantitatively. Allelopathy is defined as
inhibitory/stimulatory the effect(s) of one plant on other plants through the
release of chemical compounds in the environment (Rice, 1984). Allelopathy
interactions are primarily based on the ability of certain species to produce
secondary chemical compounds that exert some sort of biological effects on
other organisms, many of which are unknown. The chemical causing the allelophatic
effects are called allelochemicals. Allelopathy is characterized by a reduction
in plant emergence or growth, reducing their performance in the association
(Florentine et al., 2006).
Allelopathy provides a
relatively cheaper and environmental friendly weed control alternative. This
can be considered as a possible alternative weed management strategies (Cheema
et al., 2000). The world consumption of medicinal plants as pharmaceuticals,
cosmetics and as a food supplement for the improvement of human welfare is
increasing day by day. One of the possible solutions is allelopathy, the
utilization of the chemical interaction between plants by introducing modern
biological and ecological methods. The various methods such as race, frequency
control, chemical, mechanical and on chemical as properties of plants
allelopathic weed control are applied in weed control management systems.
Allelochemicals
emancipated as residues, exudates and leachates by many plants from leaves,
stem, roots, fruit and seeds reported to interfere with growth of other plants
(Asgharipour and Armin, 2010). These chemicals products mainly affect plants at
seed emergence and seedling levels (Alam and Islam, 2002; Hussain et al., 2007;
Naseem et al., 2009). The allelopathic potential of several weeds have been
studied in the laboratory (Bhowmik and Doll, 1984). Batish et al., (2007)
conducted experiment using residue of Chenopodium murale on the growth of
chickpea and pea and found that their root and shoot length significantly
decreased.
The present study was
conducted to examine the allelopathic effects of aqueous extracts of different
organs of redroot pigweed (A. retrofelexus L.) on germination, emergence,
growth and development of summer savory (S. hortensis L.) in the University of
Tabriz.
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