Allelopathic Impact of Sunflower on Germination Factors of some Agronomic Crops
Keywords:
Helianthus annus L, allelopathy, allelochemicalsAbstract
Sunflower (Helianthus annuus L.) contains water-soluble allelo-chemicals that inhibit the germination and growth of other species. The current work investigated alleopathic effects of extracts from the leaves from the plant for various parameters viz a viz percent germination, seed vigour and seedling growth against fourteen agronomic plants. Not only that different species responded differently to the same formulation of allelochemicals, but also varied physiological parameters or components thereof showed different response to the same treatment. The experiments were designed to access the degree of susceptibility/ resistance of 14 chosen agronomic crop seeds to germinate under the influence of hydroleachable allelochemics of Helianthus annus L. leaves. An attempt was also made to select a few morphological parameters of the seeds that could be suggested as an indicator for predicting the allelopathic response of crop. Seedling growth was affected the most out of all the germination factors studied, followed by speed of germination and germination percentage. As regards to germinability of seeds, the most resistant indicator was found to be Linum usitatissimum, of all the species under investigation.
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