文献类型： 外文期刊
作者： Li, Bing-jian 1 ; Cai, Qiang 2 ; Ma, Shaoying 1 ; Li, Sheng 1 ; Zhang, Xucheng 3 ; Yu, Yin 1 ;
作者机构： 1.Gansu Agr Univ, Coll Life Sci & Technol, Lanzhou, Gansu, Peoples R China
2.Gansu Prov Key Lab Aridland Crop Sci, Lanzhou 730070, Gansu, Peoples R China
3.Gansu Acad Agr Sci, Inst Dryland Agr, Lanzhou 730070, Gansu, Peoples R China
关键词： 1-Naphthylphthalamic acid; Pea primary roots; Horizontal bending; Polar transport; Indole-3-acetic acid; ACC
期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.169； 五年影响因子：4.038 ）
ISSN： 0721-7595
年卷期： 2018 年 37 卷 1 期
页码：
收录情况： SCI
摘要： Existing reports have described a notable fact that 1-naphthylphthalamic acid (NPA) coupled with 1-aminocylopropane-1-carboxylic acid (ACC), a precursor of ethylene, can regulate gravitropism of pea primary root by altering the volume of indole-3-acetic acid (IAA) and gibberellin A(3) (GA(3)) in the root. However, the mechanism behind this is not quite clear. In this study, various concentration setups of NPA and ACC were used during cultivation of pea seeds (exposed to H2O2) to study the effect of NPA and ethylene on contents of IAA and GA(3) in curving pea primary roots. Results showed that generally the horizontal bending of pea primary roots induced by H2O2 could be alleviated by NPA and ACC. Alpha-amylase activity in pea primary roots declined gradually with the rise of NPA and ACC concentrations, consequently boosting the content of starch while reducing the content of soluble sugar. ACC instigated the ethylene triple response. In addition, IAA content in primary roots declined gradually with the rise of NPA concentration, but GA(3) content did not show any consistent fluctuation. The inhibition of NPA on IAA polar transport in pea was only effective in primary roots, with no effect on the IAA transport from bud to other parts.
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