Inhibitory impact of some crop plants extracts on germination and growth of wheat.

Abstract

3 Abstract: in order to evaluate allelopathy effects of maize CVS. 301 and 704, sorghum, barley and alfalfa on some aspects of wheat plantlet such as germination and growth, a factorial experiment based on completely randomized design was carried out with three realizations. Two concentrates of 50 and 100 percent extracts based on one gram grinded aerial parts in 10 cc distilled water, were considered as 100 percent extracts. To prepare 50 and 100 percent sucrose solutions with the same osmotic potential for their relevant plant extracts, character procedure was us employed. Results showed that there were significant allelopatic differences across alfalfa, sorghum and maize cv.301 and the highest decrease in coleoptiles length was belonged to the extracts of alfalfa, sorghum and maize cv.704, while the longest seed root was achieved using alfalfa, sorghum, maize cv.301 and extracts. Decrease in the number of roots related to the extracts of alfalfa, sorghum and maize cv.704. By considering the interactions between plant extracts and sucrose solutions, it was revealed that the shortest wheat coleoptiles was obtained by applying the sorghum and alfalfa extracts and the longest seed root was achieved as a result of 100 percent alfalfa extract. The lowest seed root number was counted after maize cv.704 and alfalfa extranets, respectively. Allelopathic potentials of these plants which induces identifying and purification of allelopathic substances, may entitle them to control specific weeds especially in non-sequential crops by preparing them as natural herbicides.