Interação entre extratos aquosos de parte aérea e exsudatos radiculares de culturas de inverno sobre a germinação e o desenvolvimento de plântulas de feijão

Abstract

In seeking to clarify the occurrence of allelopathic interaction of seeds and plants of Triticum aestivum,Triticum sp.,Avena strigosa and Lolium multiflorum in Phaseolus vulgaris cv. IPR Tuiuiú seed germination () were performed at the Border Federal University South Campus Laranjeiras do Sul - PR, two bioassays: an accomplished with exudates of these plants, germinated on the role germitest and then discarded the seedlings, and a witness only with distilled water without germination the preceding beans. They analyzed the speed germination index (IVG), protrusion Speed Index Root (IVPR), germination at first count and percentage germination; and the other bioassay was performed with the aerial parts of aqueous extracts of these cultures at a concentration of 12% and a control with distilled water, which were assessed germination in the first count, percentage germination, seedling length, dry matter seedling. And of each extract was extracted and quantified the phenols.. From the results it was concluded that both root exudates as air extracts of Triticum aestivum and Triticum sp affect the vigor of bean seeds. Root exudates of Triticum aestivum , Triticum sp , Avena strigosa and Lolium multiflorum not affect the percentage of bean seed germination. Aqueous extracts of the aerial part of Triticum aestivum and Triticum sp affect the final seed germination. Lolium multiflorum culture is that less affects the germination and development of bean seedlings. The extracts with the highest amount of total phenols are Triticum aestivum, followed by Triticum sp , Avena strigosa and Lolium multiflorum respectively. Among the root exudates and shoot extracts tested what had greater allelopathic effect on the bean seed vigor wasTriticum sp , followed by Triticum aestivum , Avena strigosa and Lolium multiflorum respectively.