Allelopathic effects of black pepper leachings on Vigna mungo (L.) Hepper

摘要: The possible physiological mechanisms behind the allelopathic effects of three concentrations black pepper (Piper nigrum) whole plants leachings on germination, seedling growth, chlorophyll and supply-orientation (precursors for biosynthesis) in Vigna mungo var. NIAB were investigated. Fifty 75% leaching solutions negatively affected germination growth V. mungo. Maximum inhibition (58.11%) was recorded at leaching-treated seeds. In addition, also retarded by application leachings. Especially affect shoot more evident with increasing compared to root growth. other experiment 10-day old etiolated seedlings cultured chamber one-tenth Hoagland culture solution or without leaching-concentrations. Leaves harvested randomly 0, 6, 12, 24 48-h time interval after treatment. chlorophyll, porphyrin its biosynthetic precursors such as proto IX (Proto), Mg-proto (Mg-Proto), proto-chlorophyllide (Pchlide) determined. Synthesis inhibited increased. mole percent Mg-Proto exhibited same pattern that Pchlide Proto. data suggest enzymes responsible conversion may be major targets causing significant decrease concentration.