华北农学报 ›› 2020, Vol. 35 ›› Issue (3): 111-118. doi: 10.7668/hbnxb.20190947

所属专题: 水稻 油料作物

• 耕作栽培·生理生化 • 上一篇    下一篇

孕穗期低温灌溉对水稻剑叶和颖花生理特征的影响

罗秋红1,2, 吴俊2, 柏斌2, 庄文2, 姚栋萍1,2, 肖贵2, 刘雄伦1, 邓启云1,2,3   

  1. 1. 湖南农业大学 农学院, 湖南 长沙 410128;
    2. 杂交水稻国家重点实验室, 湖南杂交水稻研究中心, 湖南 长沙 410125;
    3. 湖南袁创超级稻技术有限公司, 湖南 长沙 410323
  • 收稿日期:2019-12-05 出版日期:2020-06-28
  • 通讯作者: 邓启云(1962-),男,湖南浏阳人,研究员,博士,博士生导师,主要从事水稻遗传育种和杂种优势利用研究。
  • 作者简介:罗秋红(1996-),女,河南信阳人,在读硕士,主要从事水稻低温生理和稻米品质研究。
  • 基金资助:
    湖南农业科技创新资金项目(2017QN02)

Effects of Low Temperature Irrigation at Booting Stage on Physiological Characteristics of Sword Leaves and Spikelets in Rice

LUO Qiuhong1,2, WU Jun2, BAI Bin2, ZHUANG Wen2, YAO Dongping1,2, XIAO Gui2, LIU Xionglun1, DENG Qiyun1,2,3   

  1. 1. College of Agronomy, Hunan Agricultural University, Changsha 410128, China;
    2. State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, China;
    3. Hunan Yuanchuang Super Rice Technology Co., Ltd, Changsha 410323, China
  • Received:2019-12-05 Published:2020-06-28

摘要: 为探究孕穗期持续低温对水稻的伤害机理,利用Y两优957、天优华占、Y两优1号和中早39这4个生产上大面积推广的水稻品种,分别在其幼穗分化Ⅴ期进行17.5℃、10 d的低温冷水灌溉处理。处理结束当天利用SPAD502测定剑叶SPAD值、利用酶联免疫吸附试验测定剑叶与颖花的抗氧化系统和渗透调节系统等生理生化指标、液相色谱串联质谱法测定ABA含量。结果表明,孕穗期低温胁迫降低了水稻的结实率与花粉育性,但不同品种的降幅有差异,分析认为结实率下降的重要原因之一是花粉育性下降。孕穗期低温胁迫后剑叶SPAD值降低,且不同品种表现有差异。根据结实率的结果,Y两优957和天优华占可作为低温耐受品种,Y两优1号和中早39可作为低温敏感品种。低温处理后,低温耐受品种剑叶SOD、POD、CAT活性升高,颖花SOD活性降低;低温敏感品种剑叶SOD、POD活性降低,颖花SOD活性升高,与低温耐受品种相反。低温耐受品种低温处理后渗透调节物质在剑叶中大多高于对照,颖花中则均低于对照;低温敏感品种则呈现较为相反的趋势。低温处理后无论材料是否耐受低温,其颖花中ABA含量均显著高于对照组。颖花与剑叶在抗氧化系统的SOD活性、渗透调节系统的PRO和STS含量等多个生理指标上大多呈现较为相反的变化趋势,推测水稻的源库受低温胁迫后可能存在一个动态平衡调节机制,为研究孕穗期低温胁迫对水稻生理特征影响提供了新的思路。

关键词: 水稻, 孕穗期, 低温, 生理, 颖花

Abstract: To explore persistent damage mechanism of low temperature on rice during the booting stage, this experiment used four rice varieties widely used in large areas of production:Yliangyou 957, Tianyouhuazhan, Yliangyou 1, Zhongzao 39. Respectively in their panicle differentiation Ⅴ period with 17.5℃ cold water irrigation, continued treatment for 10 days. After 10 days of treatment, SPAD value of sword leaves was measured by SPAD502. Physiological and biochemical indicators such as the permeation regulation system index and antioxidant system index of sword leaves and spikelets were measured by Elisa kit. ABA content of spikelets was measured by high performance liquid chromatography tandem mass spectrometry. The results showed that low temperature stress at booting stage reduced rice seed setting rate and pollen fertility. This difference in the reduction of both parameters was observed among the four rice varieties. It suggested that one of the principal reasons for the decline in setting rate was the decline in pollen fertility. The SPAD value of sword leaves decreased after low temperature stress during booting stage, and different varieties showed different degrees of decline. According to the results of the setting rate, Yliangyou 957 and Tianyouhuazhan could be considered as low temperature tolerant varieties while Yliangyou 1 and Zhongzao 39 could be considered as low temperature sensitive varieties. After low temperature treatment, SOD, POD and CAT activities were increased in the leaves of the tolerant varieties, while SOD activities were decreased in spikelets. SOD and POD activities of sword leaves of sensitive varieties were decreased, which was contrary to that in low temperature tolerant cultivars. Osmotic regulators in the low temperature tolerant varieties were mostly higher than those in the control group, and osmotic regulators in the spikelets were lower than those in the control group. The low temperature sensitive cultivars showed the opposite trend. ABA content in spikelets was significantly higher than that in control group, regardless of whether the varieties is resistant to low temperature. Spikelets and sword leaves were mostly showing the opposite trend on physiological and biochemical indicators. It included the SOD activity of the antioxidant system, PRO and STS content of the osmosis control system, and so on. It was speculated that there might be a dynamic regulation mechanism of the rice source sink relationships under low temperature stress, which provided a new idea for the research on the effects of low temperature stress on rice physiology at the booting stage.

Key words: Rice, Booting stage, Low temperature, Physiology, Spikelets

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引用本文

罗秋红, 吴俊, 柏斌, 庄文, 姚栋萍, 肖贵, 刘雄伦, 邓启云. 孕穗期低温灌溉对水稻剑叶和颖花生理特征的影响[J]. 华北农学报, 2020, 35(3): 111-118. doi: 10.7668/hbnxb.20190947.

LUO Qiuhong, WU Jun, BAI Bin, ZHUANG Wen, YAO Dongping, XIAO Gui, LIU Xionglun, DENG Qiyun. Effects of Low Temperature Irrigation at Booting Stage on Physiological Characteristics of Sword Leaves and Spikelets in Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(3): 111-118. doi: 10.7668/hbnxb.20190947.

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