Acceso usuarios
Lucio Zabot, Luis Marcelo Costa Dutra, Danton Camacho Garcia, Nilson Lemos Menezes, Marcos Paulo Ludwig
Com o objetivo de avaliar o crescimento de plântulas de feijoeiro, foi realizado um experimento para avaliar a influência da temperatura, em lotes com diferentes qualidades fisiológicas de duas cultivares de feijão (Phaseolus vulgaris L.). O experimento foi conduzido em câmaras climatizadas no Laboratório Didático e de Pesquisas em Sementes do Departamento de Fitotecnia – UFSM, onde foram usadas as temperaturas constantes de 10, 15, 20, 25 e 30 ºC, com as cultivares Valente e Uirapuru e quatro lotes de diferentes qualidades fisiológicas, obtidos por meio de envelhecimento artificial durante períodos de zero, 12, 24 e 36 horas (41 ºC e 100% de UR do ar). O delineamento usado foi inteiramente ao acaso, com quatro repetições. A cultivar Uirapuru apresentou desempenho inferior a Valente nas menores temperaturas, enquanto que nas menores ocorre o inverso. A qualidade fisiológica das sementes interfere no desenvolvimento de plântulas. As baixas temperaturas influenciam negativamente a germinação e elongação do hipocótilo
Aiming to evaluate the initial growth of bean seedlings, it was carried out an experiment analyzing the influence of temperature on different levels of physiological qualities of two common bean varieties (Phaseolus vulgaris L.). The experiment was conducted in climatic chambers in the Didactic and Research Lab of the Departamento de Fitotecnia – UFSM – where the varieties Valente and Uirapuru with four different physiological qualities, obtained through artificial aging during periods of zero, 12, 24 and 36 hours (41 ºC and 100% of air RH), were subjected to different constant temperatures of 10, 15, 20, 25 and 30 ºC, The treatments were evaluated according to the following variables: germination, first germination count, Velocity Germination index, length of hypocotyl and radicle of young plants and dry matter of hypocotyl and radicle. The experimental design used was complete random, with four replications. In the condition of the experiment, the variety Uirapuru showed an inferior development compared to Valente in the lowest temperatures for the analyzed variables, while the physiological quality of the seeds interferes in the development of young plants. Low temperatures have affected negatively the germination and elongation of the hypocotyl
