中国水稻科学

中国水稻科学 ›› 2013, Vol. 27 ›› Issue (1): 77-83.DOI: 10.3969/j.issn.10017216.2013.01.011

• 研究报告 • 上一篇    下一篇

抽穗期干旱复水对不同产量早稻品种结实及一些生理指标的影响

陈小荣*,刘灵燕,严崇虎,钟蕾,朱昌兰,彭小松,贺晓鹏,傅军如,欧阳林娟,贺浩华   

  1. 江西农业大学 农学院/江西省作物生理生态与遗传育种重点实验室/作物生理生态与遗传育种教育部重点实验室， 江西 南昌 330045；
  • 收稿日期:2012-02-27 修回日期:2012-10-28 出版日期:2013-01-10 发布日期:2013-01-10
  • 通讯作者: 陈小荣*,
  • 基金资助:

    国家自然科学基金资助项目（30860136）； 江西省科技支撑计划资助项目（2010BNA03600）； 江西省教育厅项目（GJJ10423）； 江西省领军人才培养计划资助项目。

Effects of Rewatering after Drought at Heading Date on Seed Setting and Some Physiological Indexes in Early Rice Varieties with Different Yields

CHEN Xiaorong*, LIU Lingyan, YAN Chonghu, ZHONG Lei, ZHU Changlan, PENG Xiaosong, HE Xiaopeng, FU Junru, OUYANG Linjuan, HE Haohua   

  1. College of Agronomy, Jiangxi Agricultural University/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding of Jiangxi Province/Key Laboratory of Crop Physiology, Ecology, Genetics and Breeding, Ministry of Education, Nanchang 330045, China;
  • Received:2012-02-27 Revised:2012-10-28 Online:2013-01-10 Published:2013-01-10
  • Contact: CHEN Xiaorong*,

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被引次数

26

摘要： 为了探明生育后期干旱复水对双季早稻产量补偿效应及其生理机制，选择淦鑫203和淦鑫206为材料，于抽穗期干旱7 d，然后复水处理，分析了其结实和产量、剑叶渗透调节物质、丙二醛（MDA）和内源激素含量及保护酶活性等。结果表明，干旱复水处理后供试品种的结实率、千粒重及单株产量均表现出不同程度下降，其中，结实率和单株产量降幅均达显著水平；抽穗期干旱7 d复水不存在产量补偿效应；两个品种剑叶可溶性糖（SS）、游离脯氨酸（Pro）、MDA含量以及超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性均表现为干旱处理显著高于CK，以复水0 d后相差最大，复水后上述指标均明显下降，但处理与CK之间至复水12 d后仍然存在一定差距；总体上，淹水条件下抽穗期两个品种剑叶IAA、GA3含量随生育进程呈现上升趋势，而ABA、ZR含量呈现下降趋势；干旱复水处理下两个品种剑叶ABA、IAA及ZR含量呈持续上升趋势，GA3含量则表现出先降后升趋势。抽穗期干旱处理将启动稻株体内抗衰老机制，复水后将在一定程度上激活稻株体内生长促进因子并抑制生长抑制因子，但其效果十分有限，且与品种产量相关不显著。

关键词: 早稻, 不同产量品种, 干旱复水, 结实, 生理指标

Abstract: In order to prove up yield compensatory effect and the physiological mechanism of doubleseason early rice under the treatment of rewatering after drought 7 days at heading,  the seed setting rate and yield,  contents of osmolytes, malondialdehyde (MDA), endogenous hormones, and protective enzyme activity  in flag leaf were  investigated with Ganxin 203 and Ganxin 206  as material. The results were as follows: the seedsetting rate, 1000grain weight and yield per plant of the two varieties  declined to various extent under the treatment of rewatering after drought. Among them, seed setting rate and yield per plant differed significatly, demonstrating a lack of yield compensatory effect under the treatment of rewatering after 7 days of drought at heading. The contents of soluble sugar(SS), free proline(Pro), MDA, superoxide dismutase(SOD), and catalase(CAT) activity in flag leaf under the treatment for the two varieties  were  significantly higher than the CK and the gap peaked 0 day after rewatering (DAR). The abovementioned indexes all decreased markedly after rewatering with difference between the treatment and the CK till 12 DAR. As a whole, under the flooded conditions  at  heading, contents of endogenous hormones  of  Indole3acetic acid(IAA) and  gibberellin A3(GA3) in flag leaf increased, while abscisci alid (ABA) and   zeatin riboside (ZR)  contents declined along with the growth course. The ABA, IAA and ZR  contents in the flag leaf of the two varieties under the treatment continually increased, while GA3 content decreased at first then increased. The treatment of drought after heading would promote the senescence resistant mechanism inner the rice plant, and rewatering would activate the growth promotion factors and inhibited the growth restrain factors, but the effects were quite limited and not evidently related with the yield performance.

Key words: early rice, varieties with different yields, rewatering after drought, seed setting, physiological indexes

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