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中国农学通报 ›› 2016, Vol. 32 ›› Issue (36): 16-23.doi: 10.11924/j.issn.1000-6850.casb16070120

所属专题: 生物技术 水稻

• 农学 农业基础科学 • 上一篇    下一篇

孕穗期低温条件下ABA对水稻结实率及叶片生理特性的影响

项洪涛1,2,王彤彤2,郑殿峰3,王立志2,洛 育2,李 琬1,2   

  1. (1黑龙江省农业科学院博士后工作站,哈尔滨 150086;2黑龙江省农业科学院耕作栽培研究所,哈尔滨 150086;3黑龙江八一农垦大学,黑龙江大庆 163319)
  • 收稿日期:2016-07-24 修回日期:2016-09-19 接受日期:2016-09-21 出版日期:2016-12-26 发布日期:2016-12-26
  • 通讯作者: 项洪涛
  • 基金资助:
    中国博士后基金面上项目“开花期低温导致寒地粳稻颖花败育的生理学机理研究”(2016M591563);黑龙江省政府博士后资助基金项目“花期低温导致水稻颖花败育的机理研究”(LBH-Z15197);黑龙江省科学基金面上项目“黑龙江省水稻抗瘟模块的挖掘及近等基因系构建”(C2015028);黑龙江省农业科技创新工程青年基金项目“ABA对水稻障碍型冷害防控效果研究”(2013QN005);黑龙江省农业科学院引进博士人员科研启动金项目“孕穗期低温导致水稻颖花败育的机理研究”(201507-07)。

Effect of ABA on Seed-setting Rate and Physiological Characteristics of Rice Leaves Under Low Temperature Stress at Booting Stage

Xiang Hongtao1,2, Wang Tongtong2, Zheng Dianfeng3, Wang Lizhi2, Luo Yu2, Li Wan1,2   

  1. (1Heilongjiang Academy of Agricultural Sciences Postdoctoral Programme, Harbin 150086; 2Crop Tillage and Cultivation Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086; 3Collage of Agronomy, Heilongjiang Bayi Agricultural University, Daqing Heilongjiang 163319)
  • Received:2016-07-24 Revised:2016-09-19 Accepted:2016-09-21 Online:2016-12-26 Published:2016-12-26

摘要: 为了明确ABA对孕穗期低温下水稻结实率及叶片生理特性的调控效应,本试验在盆栽条件下,以2个水稻(Oryza sativa L.)品种‘龙粳11’(冷敏型)和‘龙稻5’(耐冷型)为材料,于孕穗期在人工气候室进行低温(15℃,持续1,2,3,4,5天)处理,并喷施不同浓度的脱落酸(ABA),研究低温条件下ABA对不同水稻结实率的调控效应,同时探讨了ABA和低温对水稻叶片膜透性、抗氧化酶等生理特性的影响。结果表明:低温条件下,‘龙稻5’的结实率变化不大,‘龙粳11’的结实率显著降低,20 mg/L的ABA能够有效缓解低温伤害,相对提高低温胁迫下水稻的结实率。叶片超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性表现出先升高后下降的变化趋势,‘龙稻5’的抗氧化酶活性、可溶性糖和可溶性蛋白含量高于‘龙粳11’,但丙二醛(MDA)含量和相对电导率低于‘龙粳11’。ABA可提高冷敏品种的抗氧化酶活性、可溶性糖和可溶性蛋白的含量,同时可降低MDA含量和相对电导率。这说明ABA可以通过调控水稻抗氧化酶、可溶性糖等生理指标的活性及含量,进而提高冷敏水稻品种的耐冷性。

关键词: 糖, 糖, 根系, 生长发育, 调控机理

Abstract: The aim is to clarify the regulating effects of ABA under low temperature stress on seed-setting rate and physiological characteristics of rice leaves at booting stage. This study was conducted with two rice cultivars ‘Longjing11’ (cold sensitive) and ‘Longdao5’ (cold tolerant) which were planted in pots. At booting stage, the low temperature treatments (15℃, lasting 1, 2, 3, 4, 5 d) were carried out in climatic laboratory. The different concentrations of abscisic acid (ABA) were sprayed. The regulating effects of ABA on the seed-setting rate of different rice cultivars were studied. The effects of ABA and low temperature on the membrane permeability of leaf and antioxidant enzyme were also discussed. The results showed that the seed-setting rate of ‘Longdao5’ had little change in low temperature condition, and the seed-setting rate of ‘Longjing11’ decreased significantly. Spraying of 20 mg/L ABA could effectively alleviate the cold damage, and the seed-setting rate was improved relatively under low temperature. The activities of SOD, POD and CAT in leaves first showed an increasing trend then a decreasing trend. The activities of antioxidase, contents of soluble sugar and soluble protein of ‘Longdao5’ were higher than those of ‘Longjing11’, but the content of malondialdehyde (MDA) and relative conductivity were lower than that of ‘Longjing11’. It indicated that ABA could increase the cold tolerance of cold sensitive rice cultivar through regulating some physiological characteristics such as the activities of antioxidant enzyme, the content of soluble sugar in leaf.