Effects of Exogenous Calcium on the Physiological Characters of Cajanus cajan under Drought Stress

doi:10.11733/j.issn.1007-0435.2014.05.021

Acta Agrestia Sinica ›› 2014, Vol. 22 ›› Issue (5): 1051-1055.DOI: 10.11733/j.issn.1007-0435.2014.05.021

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Effects of Exogenous Calcium on the Physiological Characters of Cajanus cajan under Drought Stress

CHEN Ying¹, WANG Pu-chang¹, ZHAO Li-li², YANG Chun-yan¹, SONG Gao-xiang²

1. Guizhou Institute of Prataculture, Guiyang, Guizhou Province 550006, China;
2. College of Animal Science, Guizhou University, Guiyang, Guizhou Province 550025, China

Received:2013-11-18 Revised:2014-01-06 Online:2014-10-15 Published:2014-09-30

外源钙对干旱胁迫下木豆种苗生理特性的影响

陈莹¹, 王普昶¹, 赵丽丽², 杨春燕¹, 宋高翔²

1. 贵州省草业研究所, 贵州贵阳 550006;
2. 贵州大学动物科学学院, 贵州贵阳 550025

通讯作者: 王普昶
作者简介:陈莹（1986-），女，贵州独山人，硕士，主要从事牧草生理研究，E-mail：cy860803@163.com；
基金资助:
国家自然科学基金（31260572）；贵州省科学技术基金（黔科合J字[2012]2198号）；贵州省农科院基金（黔科合NY字[2010]3045号）资助

Abstract

Abstract:

The arid environments in the karst area of Guizhou were simulated using exogenous Ca²⁺( CK and 50 mmol·L^-1) and the different concentrations of PEG 6000 (CK, 5%, 10% and 20%). The effects of exogenous calcium on the seed germination, soluble protein and GSH contents, SOD, POD and CAT activities of Cajanus cajan under different drought stresses were investigated. The results showed that seed germination presented declining tendency with the increase of the PEG concentration (P<0.01), and there was no significant effect by applying exogenous calcium. SOD and POD activities revealed exponential changes (P<0.01), and CAT activity, soluble protein and GSH contents presented negative quadratic curve with the increase of drought stress. Exogenous calcium significantly improved soluble protein and GSH contents (P<0.05). The experimental results show that exogenous calcium can alleviate damage from drought stress and improve the drought resistance of C. cajan.

Key words: Exogenous calcium, Drought stress, Cajanus cajan, Physiological characters

摘要：

通过模拟贵州岩溶地区土壤富钙的生境（CK和50 mmol·L^-1 CaCl₂），以岩溶地区常见饲用灌木木豆（Cajanus cajan）为材料，研究外源钙对干旱胁迫（CK，5%，10%，20% PEG-6000）下木豆种子的萌发率、保护性酶活性（SOD，POD，CAT）及可溶性蛋白质和GSH含量的变化。结果表明：木豆种子萌发随着干旱胁迫的增强而呈显著线性下降趋势（P<0.01），施加外源钙对其无显著影响；随着干旱胁迫的增强保护酶SOD和POD成指数关系，CAT成负二次关系；施加外源钙能显著提高低浓度干旱胁迫下木豆种子SOD和POD活性；可溶性蛋白质和GSH含量随着干旱胁迫的增强呈现指数和二次曲线关系，施加外源钙显著提高了木豆种子可溶性蛋白质和GSH含量（P<0.05）。表明外源钙的施加能缓解木豆种子受到的干旱伤害，提高木豆苗期抗旱性。

关键词: 外源钙, 干旱胁迫, 木豆, 生理特性

CLC Number:

CHEN Ying, WANG Pu-chang, ZHAO Li-li, YANG Chun-yan, SONG Gao-xiang. Effects of Exogenous Calcium on the Physiological Characters of Cajanus cajan under Drought Stress[J]. Acta Agrestia Sinica, 2014, 22(5): 1051-1055.

陈莹, 王普昶, 赵丽丽, 杨春燕, 宋高翔. 外源钙对干旱胁迫下木豆种苗生理特性的影响[J]. 草地学报, 2014, 22(5): 1051-1055.

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Effects of Exogenous Calcium on the Physiological Characters of Cajanus cajan under Drought Stress

外源钙对干旱胁迫下木豆种苗生理特性的影响

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