Potencial alelopático de exsudado radicular de sorgo sacarino

Abstract

The goal of this study was to identify the effect of four sweet sorghum hybrids exudates on germination and seedling development of test plants. Two bioassays were carried out to check the allelopathic exudate potential of the sweet sorghum hybrids CVSW 81198, CVSW 80007, CVSW 80147 and XBSW 82158 in test plants. In the first bioassay, were evaluated the germinability and seedling development of four test plants (lettuce, I. quamoclit, D. nuda and onion) submitted to the four sweet sorghum exudates. The wheat coleoptile length and the coleoptile length inhibition/ stimulation percentage by the exudate treatments were evaluated in the second bioassay. The solutions containing root exudate, from the four sweet sorghum hybrids, did not alter the germinability and seedling development of the test plants, neither the coleoptiles wheat length.