植物生长调节剂对水稻分蘖芽生长与内源激素变化的调控效应.pdf

作物学报 ACTA AGRONOMICA SINICA 2011, 37(4): 670−676 /zwxb/ ISSN 0496-3490; CODEN TSHPA9 E-mail: xbzw@ DOI: 10.3724/SP.J.1006.2011.00670 植物生长调节剂对水稻分蘖芽生长和内源激素变化的调控效应 刘 杨 丁艳锋 王强盛 李刚华 许俊旭 刘正辉 王绍华* / , 210095 : 6 44 , ABAGA3 NAA , GA3 NAA , ABA GA3 NAA ABA , Z+ZR , GA3 IAA , , IAA Z+ZR ABA , IAAABA Z+ZR , IAA Z+ZR , ABA , 3 : ; ; ; Effect of Plant Growth Regulators on the Growth of Rice Tiller Bud and the Changes of Endogenous Hormones LIU Yang, DING Yan-Feng, WANG Qiang-Sheng, LI Gang-Hua, XU Jun-Xu, LIU Zheng-Hui, and WANG * Shao-Hua Agronomy College, Nanjing Agricultural University / Key Laboratory of Crop Physiology Ecology in Southern China, Ministry of Agriculture, Nanjing 210095, China Abstract: Hormones have substantial effect on tiller bud growth of rice. However, little is known on the relation between en- dogenous hormonal changes and the growth of rice tiller bud induced by exogenous hormones. In present study, two rice cultivars (Yangdao 6 and Nanjing 44) were used to investigate the effect of exogenous ABA, GA3, and NAA on tiller bud outgrowth and the changes of endogenous hormones. The results showed that exogenous GA3 and NAA completely inhibited the tiller bud growth, while applied ABA did not, but ABA slowed the growth rate of it. Both exogenous GA3 and NAA increased the ABA contents and decreased the Z+ZR contents in tiller node and tiller bud, and exogenous GA3 increased the IAA content in tiller node, and IAA and Z+ZR changed earlier than ABA. In conclusion, IAA and Z+ZR may play key roles in regulating the growth of rice tiller bud, while ABA may not, although ABA can a