Indoleacetic acid levels in Phaseolus, Zea and Pincus during seed germination

Se determinaron los contenidos de acido indolacetico (AIA) en semillas secas y en germinacion de habichuela (Phaseolus vulgaris), maiz (Zea mays) y pino (Pinus silvestris). las embebidas de las 3 especies examinadas. fresco fue muy diferente en las 3 especies, en tanto que la variacion entre las diferentes cosechas de la misma especie fue pequena. nivel mas alto de AIA y el frijol el mas bajo. una influencia decisiva en el nivel de AIA. especies aumento considerablemente durante las primeras 4 horas de expansion. El nivel mas alto de AIA se encontro en las semillas que se habian expandido durante 24-48 horas, periodo durante el cual las radiculas comenzaron a emerger de la testa de la semilla. posteriormente durante el periodo de crecimiento radical rapido. spa

The content of indoleacetic acid (IAA) was determined in dry and germinating seeds of french beans (Phaseolus vulgaris), maize (Zea mays) and Scots pine (Pinus silvestris). IAA was found in both the dry and the soaked seeds of the 3 species examined. The amount of IAA/fresh wt was extremely different in the 3 species whereas the variation between different harvests of the same species was small. Maize contained the highest level of IAA and beans the smallest. The time of imbibition was of decisive importance for the level of IAA. In all 3 species the content of IAA increased considerably during the initial 4 hours of swelling. The highest level of IAA was found in seeds that had swelled for 24-48 h, during which period the radicles began to emerge from the seed coat. Later, during the period of rapid root growth, the content of IAA declined. (AS) eng