摘要
以杂交稻籼优 63(Sy63) ,常规稻武育粳 (Wyj) ,旱稻 85 - 1 5 ( 85 - 1 5 )为材料 ,分别研究了旱作处理与水作处理的水稻体内脱落酸 (ABA) ,生长素 (IAA) ,赤霉素 (GAs)和细胞分裂素 (CTKs)在全生育期内的变化规律 ,初步探究了激素变化与旱作水稻形态及生理适应性的关系。旱作条件下水稻根叶的ABA都显著增加且各品种均呈现一定的规律性 ;旱作水稻的根叶中GAs规律与其ABA的变化规律相似。旱作水稻叶中IAA苗期增加而根先减少后增加 ,后期IAA逐步减低 ;苗期旱作水稻叶中CTKs增加而根减少 ,后期差异不大。实验结果表明旱作条件下的气孔行为可能由ABA和IAA共同调控 ;
Investigations were made of dynamic change in phytohormones, including abscisic acid (ABA), indole-3-acetic acid (IAA), gibberellins (GAs) and cytokinis (CTKs) and their effects on the physio-biochemistry in and morphology of rice of three different cultivars, i.e .,'Shanyou63' (Sy63), 'Wuyujing'(Wyj) and upland rice '85-15' (85-15) grown in upland soil. The content of ABA increased as compared with that in the CK (waterlogged) and the dynamic change in ABA in rice of different cultivars followed some rules. And the dynamic change in GAs was similar to that in ABA. IAA decreased in roots and increased in leaves at the beginning of the stress period. The change in CTKs content was similar to that in IAA. The results suggested that on the upland soil the action of stoma of rice was controlled by IAA as well as ABA and the development of lateral roots was related to the increase in endogenous IAA and the decrease in endogenous CTKs in root.
出处
《土壤学报》
CAS
CSCD
北大核心
2002年第2期206-213,共8页
Acta Pedologica Sinica
基金
国家自然科学基金资助项目 (编号 :3 9970 449和 3 0 0 70 446)
关键词
旱作水稻
内源激素
形态
生理生化指标
Rice grown in upland soil, Endogenous hormones, Morphology, Physio- biochemistry
