Allelopathic effects of some Brassica species on germination and growth of cutleaf ground-cherry (Physalis angulata L.).
Abstract
A laboratory study was conducted to determine the allelopathic potential of Brassica species widely cultivated in Turkey, i.e. round white radish (Raphanus sativus), garden radish (Raphanus sativus), black radish (Raphanus sativus var. niger), little radish (Raphanus sativus var. radicula), turnip (Brassica campestris var rapa) and rape (Brassica napus var. oleifera) cv. Westar, on the germination and seedling growth of cutleaf ground-cherry (Physalis angulata) using shoot powder extracts at various concentrations (2, 4 and 8%). There were differences among Brassica species for allelopathic inhibition of cutleaf ground-cherry seed germination and seedling growth. Shoot powder extracts exhibited marked differences in the inhibition of cutleaf ground-cherry seed germination. Inhibition on seedling growth was not as much as inhibition on germination. The inhibitory effects of shoot powder extracts on cutleaf ground-cherry seed germination and seedling growth increased as their concentrations increased.
