欢迎访问《中国农学通报》,

中国农学通报 ›› 2021, Vol. 37 ›› Issue (19): 13-22.doi: 10.11924/j.issn.1000-6850.casb2020-0504

所属专题: 生物技术 玉米 农业气象 烟草种植与生产

• 农学·农业基础科学 • 上一篇    下一篇

不同温度水杨酸引发对干旱胁迫下玉米种子发芽及幼苗生理特性的影响

侯林欣(), 吕强, 黄明, 焦念元, 尹飞, 刘领, 吕梦, 付国占()   

  1. 河南科技大学农学院/河南旱地农业工程技术研究中心,河南洛阳 471003
  • 收稿日期:2020-09-27 修回日期:2020-12-16 出版日期:2021-07-05 发布日期:2021-07-29
  • 通讯作者: 付国占
  • 作者简介:侯林欣,男,1995年出生,河南安阳人,硕士研究生,研究方向:作物旱作生理生态。通信地址:471003 河南洛阳洛龙区开元大道263号 河南科技大学,E-mail: 1119315230@qq.com
  • 基金资助:
    国家重点研发计划重点专项“河南多热少雨区小麦-玉米周年集约化丰产增效技术集成与示范”(2018YFD0300707);国家重点研发计划重点专项“黄淮海南部小麦-玉米周年光热资源高效利用与水肥一体化均衡丰产增效关键技术研究与模式构建”(2017YFD0301101)

SA Priming of Maize Seeds at Different Temperature Under Drought Stress: Effects on Seed Germination and Seedling Physiological Characteristics

Hou Linxin(), Lv Qiang, Huang Ming, Jiao Nianyuan, Yin Fei, Liu Ling, Lv Meng, Fu Guozhan()   

  1. College of Agriculture, Henan University of Science and Technology/Henan Dryland Agricultural Engineering Technology Research Center, Luoyang Henan 471023
  • Received:2020-09-27 Revised:2020-12-16 Online:2021-07-05 Published:2021-07-29
  • Contact: Fu Guozhan

摘要:

为探究不同温度水杨酸(SA)引发对水分胁迫下玉米种子发芽和幼苗生长、生理特性的影响,以‘郑单958’、‘金甜808’和‘京科糯2000’为试验材料,设置5组处理(CK、5、10、15、20℃)研究干旱胁迫下幼苗生长表现。结果表明,水杨酸引发显著提高了玉米幼苗抗氧化酶活性,增加了渗透调节物质含量,降低了丙二醛(MDA)含量,缓解了水分胁迫对玉米生长的影响。其中,玉米发芽参数(发芽率、发芽势、发芽指数和活力指数),‘郑单958’和‘金甜808’以15℃引发处理最高,较对照分别提高了16.67%、21.26%、17.69%、25.39%和10.88%、8.76%、10.02%、26.83%;而‘京科糯2000’以10℃引发处理最高,较对照提高了16.48%、10.73%、14.27%和32.00%。可见,种子引发增强了干旱胁迫下玉米种子的发芽能力,本研究结果可为种子引发在旱地玉米生产上的应用提供理论依据。

关键词: 玉米, 种子引发, 水杨酸, 温度, 水分胁迫, 干旱胁迫

Abstract:

The aim is to investigate the effect of SA priming at different temperature on maize seed germination, growth and physiological characteristics of maize seedling under drought stress. The maize varieties ‘Zhengdan 958’, ‘Jingtian 808’ and ‘Jingkenuo 2000’ were used as materials, and five treatments including CK, 5, 10, 15 and 20℃ were designed to study the seedling growth performance under drought stress. The results showed that SA priming significantly enhanced the antioxidant enzyme activities, increased the content of osmotic regulatory substances, and decreased the content of MDA in maize seedling, alleviated the effects of drought stress on the growth of maize. Among them, the maize germination parameters (germination rate, germination potential, germination index and vigor index) of ‘Zhengdan 958’ and ‘Jingtian 808’ were the highest at 15℃ priming treatment, increased by 16.67%, 21.26%, 17.69%, 25.39% and 10.88%, 8.76%, 10.02%, 26.83%, respectively, compared with those of the control; while for ‘Jingkenuo 2000’, the priming temperature of 10℃, could achieve an increase of 16.48%, 10.73%, 14.27% and 32.00% compared with those of the control. In conclusion, seed priming can enhance the germination ability of maize seeds under drought stress, and the study could provide a theoretical basis for the application of seed priming to maize production in dryland.

Key words: maize, seed priming, salicylic acid, temperature, dehydration stress, drought stress

中图分类号: