Potassium Release and Seed Vigour in Germinating Bean (Phaseolus vulgarisL.) Seed as Influenced by Temperature over the Previous Five Generations

Publisher Website
Google Scholar
Abstract
Three cultivars of bean (Apollo, Goldcrop, Oregon-1604) were grown in a phytotron at four temperatures (21 day/16 night, 24/19, 27/22, 30/25 °C) for four generations. These were called Previous Temperature Treatments. No attempt at selection was made. These four lines were then grown at each of the four temperatures for one generation, resulting in 16 lines. The latter treatment was called Final Temperature Treatment. The seed was examined using a test based on the leaching of potassium from imbibing seeds, which correlates better with field performance than germination tests. A germination test was also carried out. Seed weight decreased with increasing Final Temperature, embryo weight was unaffected, and Previous Temperature Treatment had no effect on these parameters. Final Temperature Treatment had little consistent effect on K+ loss after 24 h or 72 h leaching, but there was a large and significant effect due to Previous Temperature Treatment. Leaching of K+ was considerably less in the 27/22 °C Previous Temperature lines, and this effect was unaffected by Final Temperature Treatment and was greatest in the cultivar Apollo. In the germination test the effect of Final Temperature Treatments was inconsistent, but with cv. Apollo there was a higher percentage of high vigour seedlings in the 27/22 °C Previous Temperature Treatment lines. By growing plants for four generations at 27/22 °C, seed was produced with a greater potential for vigour.
Keywords

This publication has 0 references indexed in Scilit: