Allelopathic crops when used as cover crop, mulch, smother crops, green manures, or grown in rotational sequences are helpful in reducing noxious weeds and plant pathogen, improve soil quality and crop yield. are affected either by their own toxicity or phytotoxin exudates when their residues decompose in the soil, that show strong suppression on weed emergences. Several crops including alfalfa, buckwheat, maize, rice, rye, sorghum, sunflower, wheat, etc. Aspergillus fumigatus, Aspergillus tamarii Aspergillus niger Streptococcus aureus Escherichia coli Pseudomonas aeruginosaĬrop allelopathy may be useful to minimize serious problems in the present agricultural production such as environmental pollution, unsafe products, human health concerns, depletion of crop diversity, soil sickness and reduction of crop productivity. Thus play an important role in plant defense mechanism and can be utilized as a valuable source of bio-herbicides and pesticides. Mthyl-trihydroxyhexanoate exhibited wide range of defensive activity against microbes and crop seeds and also possesses potent antioxidative activity. It showed strong inhibitory activity up to 62.5ppm concentration and below this concentration the effect was stimulatory. This pure compound exhibited concentration dependent inhibitory and stimulatory activity on rice seeds germination and seedling growth. and were much more sensitive to methyl-trihydroxy-hexanoate at all concentrations than. It also revealed strong inhibitory activity against Aspergellosis disease causing fungi namely and at all concentrations. It showed significant antioxidant activity with Ic50 value of 2.5µg/ml whereas tert-butyl-1-hydroxytoluene and ascorbic acid revealed 26.0µg/ml and 5.0µg/ml respectively. This compound showed a strong antioxidant activity as well as strong antimicrobial activity. Chromatographic and spectral analyses of TrMF revealed the compound to be methyl 2,3,4-trihydroxyhexanoate. Compound responsible for strong sour tamarind flavor has been isolated and identified from Methanol fraction of tamarind leaves (TrMF). Flavoring compounds of plants play a significant role in plant defense mechanism.
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