冠菌素对大豆根系生理生化特性调控.pdfVIP

中国科技论文在线 冠菌素对大豆根系生理生化特性的调控# 沈雪峰，陈勇* （华南农业大学农学院，广州510642 ） 5 摘要：为了研究新型生物发酵植物生长调节剂冠菌素对田间不同时期大豆根系生理生化特性 的调控，本文以中黄35 为试验材料，采用大田试验方法，通过测定根系生物量、根系活力、 可溶性蛋白、可溶性糖含量以及根系中的植物激素和矿质元素。结果表明：冠菌素处理增加 了根干重，提高了大豆根系的氧化还原能力和可溶性糖含量，增加了根系中的钾，钙，铁， 10 锌元素的含量。冠菌素通过调节内源激素来实现调控根系生理活性表达，显著提高了根系中 IAA ，GAs 和ABA 的含量，同时降低了CTKs 的含量。 关键词：大豆；冠菌素；根系；激素；矿质元素 中图分类号：S565.101 15 Regulation of coronatine on the physiological and biochemical character in soybean roots SHEN Xuefeng, CHEN Yong (College of Agriculture, South China Agricultural University, Guangzou 510642) Abstract: In this paper, a field experiment was conducted to investigate the effect of plant growth 20 regulator (Coronatine, COR) on the physiological and biochemical parameters in soybean (Glycine max L.Zhonghuang 35) roots in 2008 at Shangzhuang trial station of China Agricultural University, Beijing. Coronatine was sprayed at 0 μ mol/L, 0.1 μ mol/L and 0.01 μ mol/L in the early flowering stage. The result showed that the oxidation-reduction capacity, soluble sugar and soluble protein of soybean root were increased by COR, K, Ca, Fe, Zn were improved but N, P 25 were decreased by Coronatine in the root, CTKs ，Gas, and ABA were enhanced but IAA was decreased by COR. Key words: Soybean; Coronation; Root; Hormone; Trace ment 0 引言 30 根系在植物的生命活动中发挥着重要地位，它既是植物营养的吸收器官，也是一个重要 [1] 的代谢器官，对作物的生长发育、产量形成及植株体的生命活动起着重要作用 。若根系发 [2] 育不良或生理功能失调，会严重影响整株大豆的生长发育并降低籽粒产量和品质 。根系建 成和功能发挥受内源激素等信号物质的调节，同时根系