华北农学报 ›› 2007, Vol. 22 ›› Issue (2): 101-105. doi: 10.3321/j.issn:1000-7091.2007.02.025

所属专题: 玉米 抗旱节水 栽培生理

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玉米高产种质抗旱性鉴定及生理机理研究

郭秀林1, 刘子会1, 栗秋生3, 张文英2, 谢俊良2, 栗雨勤2   

  1. 1. 河北省农林科学院遗传生理研究所, 河北 石家庄 050051;
    2. 河北省农林科学院旱作研究所, 河北 衡水 053000;
    3. 河北省农林科学院植物保护研究所, 河北 保定 071000
  • 收稿日期:2007-01-20 出版日期:2007-04-28
  • 作者简介:郭秀林(1971-),女,河北康保人,副研究员,博士,主要从事植物抗逆生理及分子遗传研究工作。
  • 基金资助:
    河北省自然科学基金项目(200600727);北京农业育种基础研究创新平台·北京市自然科学基金项目(YZPT02-03)

Study on Identification of Drought-Resistant and Physiological Mechanism of High-Yield Maize Germplasm

GUO Xiu-lin1, LIU Zi-hui1, LI Qiu-sheng3, ZHANG Wen-ying2, XIE Jun-liang2, LI Yu-qin2   

  1. 1. Institute of Genetics and Physiology, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, China;
    2. Institue of Dryland Farming, Hebei Academy of Agriculture and Forestry Sciences, Hengshui 053000, China;
    3. Insititute of Plant Protection, Hebei Academy of Agriculture and Forestry Sciences, Baoding 071000, China
  • Received:2007-01-20 Published:2007-04-28

摘要: 将玉米种子萌发期、苗期及整个生育期相结合,研究了玉米种子耐旱指数(GSI)、不同生理性状和抗旱指数(DRI)及其相互关系。结果发现:正常条件下叶片水势值较高、胁迫后降低幅度较大以及渗透势较高、胁迫后降低幅度较小的品种,抗旱指数较大;正常条件下水势低、胁迫后降低幅度中等以及胁迫前后渗透势降低幅度较大的品种抗旱指数较低;正常条件下植株POD活性较低、而胁迫后酶活升高幅度较大的品种,抗旱指数较大,而本身酶活较高,胁迫后升高幅度较小的品种,抗旱指数较低;胁迫下升高幅度较小、而本身脯氨酸含量较高的品种,抗旱指数较大;胁迫下升高幅度较大且本身脯氨酸含量较低的品种,抗旱指数一般较小;正常条件下丙二醛(MDA)含量较低的品种,抗旱指数也较大。种子耐旱指数低的品种,抗旱指数也低。综合认为,萌发期种子耐旱指数、苗期叶片水势、渗透势、POD活性与抗旱指数的一致性较高,脯氨酸和丙二醛含量次之,从机理上解释了玉米抗旱性差异。

关键词: 玉米, 抗旱性, 鉴定, 生理机理, 高产

Abstract: Fourteen maize cross lines were selected in order to study the index of droughtresisrance indentification and the mechanism in germinating, seedling and maturity period. The seed germination index (GSI), physiological traits and drought resistance index (DRI) and their ralationship were analyzed. The results showed that the cultivars had high DRI which the water potential and osmotic potential were high in normal condition, and the decreasing rate were high in water potential and low in osmotic potential under osmotic stress. To cultivars which had low POD activities and high proline content in normal condition, and increasing rate were high in POD activities and low in proline content, their DRI were high too. In generally, if some cultivars had lower MDA in normal condition, their DRI were higher. In conclusion, it's consistent among GSI, water potential, osmotic potential, POD activity and DRI. These explained the difference of drought-resistance of maize cultivars in machanism.

Key words: Maize, Drought-resistant, Identification, Physiological mechanism, High-yield

中图分类号: 

引用本文

郭秀林, 刘子会, 栗秋生, 张文英, 谢俊良, 栗雨勤. 玉米高产种质抗旱性鉴定及生理机理研究[J]. 华北农学报, 2007, 22(2): 101-105. doi: 10.3321/j.issn:1000-7091.2007.02.025.

GUO Xiu-lin, LIU Zi-hui, LI Qiu-sheng, ZHANG Wen-ying, XIE Jun-liang, LI Yu-qin. Study on Identification of Drought-Resistant and Physiological Mechanism of High-Yield Maize Germplasm[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(2): 101-105. doi: 10.3321/j.issn:1000-7091.2007.02.025.