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The impacts of exogenous H2O2 on primary root horizontal bending of pea (Pisum sativum L.)

文献类型： 外文期刊

作者： Li, Sheng 1 ; Su, Lirong 1 ; Ma, Shaoying 1 ; Shi, Zhenzhen 1 ; Zhang, Zhen 1 ; Liu, Huijie 1 ; Zhang, Jinlin 2 ; Yang, X 1 ;

作者机构： 1.Gansu Agr Univ, Coll Life Sci & Technol, Gansu Prov Key Lab Aridland Crop Sci, Lanzhou 730070, Peoples R China

2.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Peoples R China

3.Gansu Acad Agr Sci, Inst Crop, Lanzhou 730070, Peoples R China

关键词： Gravitropism;H2O2;Horizontal bending;Pisum sativum L.;Primary root

期刊名称：PLANT GROWTH REGULATION （ 影响因子：3.412； 五年影响因子：3.691 ）

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收录情况： SCI

摘要： Root gravitropism makes plant roots maintain a definite growth toward gravity direction. In this study, the garden pea seeds were used to investigate the impacts of exogenous hydrogen peroxide on the primary root horizontal bending. The results showed that exogenous H2O2 inhibited primary root gravitropism and induced horizontal bending at the initial stage of the pea seed germination, and the curvature was more severe with the increase of H2O2 concentration. The horizontal bending emerged before the radicale broke through the seed coat, after which the bending could not appear, and the earlier H2O2 treated, the more obvious the effect showed. In accordance with cytohistological observations, an asymmetrical cell-elongation generated at the elongation zones of the bending root, in which the outer layer cells was remarkably wider than the inner layer cells. Besides, it was only found in Papilionoideae that the primary root horizontal bending was induced by exogenous H2O2. As the H2O2 concentrations raised, the content of gibberellin A(3) (GA(3)) increased, which stimulated the activity of alpha-amylase (EC3.2.1.1) and promoted the hydrolysis of root starch, so the root-cap parts were dyed much lighter with the raising concentrations of H2O2. Finally, the root tip lost gravisensing and horizontally bended.

  • 相关文献

[1]Initial exploration of the mechanism underlying H2O2-induced root horizontal bending in pea. Li, Sheng,Su, Li-Rong,Ma, Shao-Ying,Shi, Zhen-Zhen,Yang, Xiao-Ming. 2015

[2]外源NO和H_2O_2诱导不同颜色马铃薯花青素积累. 马廷蕊,张金文,梁慧光,柳永强. 2012

[3]NO和H_2O_2依赖Ca~(2+)/CaM信号调控马铃薯花青素积累. 马廷蕊,张金文,梁慧光,柳永强,王金虎. 2013

[4]外源NO和H_2O_2诱导马铃薯对盐碱土壤的适应. 柳永强,杨谋,马廷蕊,张勇. 2012

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