华北农学报 ›› 2019, Vol. 34 ›› Issue (3): 119-128. doi: 10.7668/hbnxb.201751362

所属专题: 玉米 油料作物

• 耕作栽培·生理生化 • 上一篇    下一篇

外源油菜素内酯对低温胁迫下玉米发芽及幼苗生理特性的影响

孙玉珺1, 吴玥1, 马德志1, 吕金莹1, 贺韵涵1, 宫磊1, 刘哲1, 高丽丹1, 李娜1, 闫冬1, 朱晶桓2, 杨德光1   

  1. 1. 东北农业大学 农学院, 黑龙江 哈尔滨 150030;
    2. 齐齐哈尔市甘南县扶贫开发服务中心, 黑龙江 齐齐哈尔 162100
  • 收稿日期:2019-01-29 出版日期:2019-06-28
  • 通讯作者: 杨德光(1967-),男,湖北孝感人,教授,博士,主要从事玉米逆境生理研究。
  • 作者简介:孙玉珺(1992-),男,黑龙江鸡西人,在读硕士,主要从事玉米低温逆境生理研究。
  • 基金资助:
    农业部全国杰出科研人才项目(2015);农业部绿色品种特性鉴定评价专项(111721301354052342);国家重点研发计划(2018YFD0300103)

Effects of Brassinolide on Seed Germination and Seedling Physiology of Maize under Low Temperature Stress

SUN Yujun1, WU Yue1, MA Dezhi1, LÜ Jinying1, HE Yunhan1, GONG Lei1, LIU Zhe1, GAO Lidan1, LI Na1, YAN Dong1, ZHU Jinghuan2, YANG Deguang1   

  1. 1. College of Agriculture, Northeast Agricultural University, Harbin 150030, China;
    2. Qiqihar Gannan Poverty Alleviation and Development Service Center, Qiqihar 162100, China
  • Received:2019-01-29 Published:2019-06-28

摘要: 为探究外源油菜素内酯(BR)对低温胁迫下玉米发芽及幼苗生理特性的影响,以天农九号和天和1号玉米杂交种为试验材料,分别用BR浸种和喷施处理后,对2个玉米品种低温处理下的农艺性状和生理特性进行了比较研究。结果表明,外源BR处理能有效缓解低温胁迫对玉米生长的抑制程度。其中0.1 mg/L BR处理效果最好,主要表现在玉米发芽率、幼苗地上及地下部生物量和SPAD值的增加;MDA含量和相对电导率的降低;SOD、POD和CAT活性的增加;脯氨酸、可溶性糖和可溶性蛋白含量的增加;与低温对照比较,玉米杂交种天农九号和天和1号起始发芽率分别提高18.89,11.10百分点,终发芽率分别提高6.67,18.89百分点;地上部干质量增加55.92%,49.15%,地下部干质量增加38.79%,14.26%,相对电导率降低7.33%,6.80%,CAT活性增加110.58%,120.43%,脯氨酸含量增加66.59%,54.63%。说明低温胁迫下喷施适宜浓度的BR对2个玉米品种缓解抑制能力不同,表现为天农九号 > 天和1号;抗冷性强弱不同的玉米品种对不同浓度BR的适应性存在差异。

关键词: 玉米, 低温胁迫, 油菜素内酯, 发芽, 生理特性

Abstract: In order to explore the effects of brassinolide(BR) on seed germination and seedling physiological characteristics of maize under low temperature stress, the maize hybrids Tiannong 9 and Tianhe 1 were used as the materials to study the changes of agronomic traits and physiological properties after their seeds were soaked or sprayed with BR. The results showed that exogenous BR treatment could effectively alleviate the inhibition of maize growth under low temperature stress. The best treating concentration was 0.1 mg/L BR, which increased the germination rate, the biomass of overground and underground parts, the SPAD value, the activities of SOD, POD and CAT, and the contents of proline, soluble sugar and soluble protein, while decreased the MDA content and the relative conductivity in maize seedlings. Compared with the low temperature control, the maize hybrids Tiannong 9 and Tianhe 1 treated with exogenous BR of 0.1 mg/L initial germination rate increased by 18.89 and 11.10 percentage points respectively, the final germination rate increased by 6.67 and 18.89 percentage points, their aboveground dry weight increased by 55.92% and 49.15%, their underground dry weight raised by 38.79% and 14.26%, their relative electrical conductivity decreased by 7.33% and 6.80%, their CAT activity increased by 110.58% and 120.43%, and their proline content increased by 66.59% and 54.63%, respectively. It suggested that the relieving effects of 0.1 mg/L BR treatment on the two maize varieties under low temperature stress were different, Tiannong 9 being better than Tianhe 1. The maize varieties with different cold resistances had different adaptability to different BR concentrations.

Key words: Maize, Chilling resistance, Brassinolide, Germinate, Physiological property

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孙玉珺, 吴玥, 马德志, 吕金莹, 贺韵涵, 宫磊, 刘哲, 高丽丹, 李娜, 闫冬, 朱晶桓, 杨德光. 外源油菜素内酯对低温胁迫下玉米发芽及幼苗生理特性的影响[J]. 华北农学报, 2019, 34(3): 119-128. doi: 10.7668/hbnxb.201751362.

SUN Yujun, WU Yue, MA Dezhi, LÜ Jinying, HE Yunhan, GONG Lei, LIU Zhe, GAO Lidan, LI Na, YAN Dong, ZHU Jinghuan, YANG Deguang. Effects of Brassinolide on Seed Germination and Seedling Physiology of Maize under Low Temperature Stress[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(3): 119-128. doi: 10.7668/hbnxb.201751362.

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