COMPARATIVE ALLELOPATHIC INTERACTIONS OF S.TORVUM (SW.) AND T. PORTULACASTRUM (L.) WITH V. UNGUICULATA (L.) WALP.VAR. PK

Prabhat Singh*

Department of Botany, Sanjay Gandhi (P.G.) College Sarurpur Khurd, Meerut, UP

Email: pskohli007@gmail.com

Received-15.03.2024, Revised-17.04.2024, Accepted-28.04.2024

Abstract: Studies were carried out to determineallelopathic interactions of a perennial weed Solanumtorvum (Sw.) (Solanaceae) and a seasonal weed Trianthema portulacastrum (L.) (Aizoaceae) with a leguminous crop Vigna unguiculata (L.)Walp.var. Pusa Komal (Lobia) at seedling stage. When Lobia seeds were grown in different concentration of S. torvum leaf leachates, the morphological attributes like % germination, shoot length, root length, biomass, vigour index, tolerance index, germination speed  and biochemical parameters viz. chlorophyll content, protein, α-amylase and peroxidase activity increased maximallyat 2% concentration ofS. torvum leaf leachate (SLL) as compared to control (DDW). On the other hand, in seedlings grown in different concentrations of T. portulacastrum leaf leachates (TLL), most of morphological and biochemical parameters increased maximally at 1% concentration. There was negligible germination in 10% T. portulacastrum leaf leachate showing highest phytotoxicity at this concentration. The studies indicate thatV. unguiculata var. PK underwent stimulation/toleranceupto 2% SLL, while seedlings exhibit stimulation at 1% TLL and further higher concentrations of SLL/TLL are phytotoxic to V. unguiculata var. PK as compared to control. Studies also indicate that T. portulacastrum leaf leachate exhibits more phytotoxicity on Vignaunguiculata var. PK as compared to S. torvum leaf leachate.

Keywords: Solanum torvum,Tolerance index, Trianthema portulacastrum, Vigour index

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