玉米重要种质资源郑58与PH4CV苗期干旱耐性比较分析

doi:10.11924/j.issn.1000-6850.casb16100059

中国农学通报 ›› 2017, Vol. 33 ›› Issue (35): 18-24.doi: 10.11924/j.issn.1000-6850.casb16100059

所属专题：资源与环境；玉米；农业气象

玉米重要种质资源郑58与PH4CV苗期干旱耐性比较分析

郭竞选,彭雷,樊若楠,詹启迪,李保珠

棉花生物学国家重点实验室/河南省植物逆境生物学重点实验室/河南大学生命科学学院,棉花生物学国家重点实验室/河南省植物逆境生物学重点实验室/河南大学生命科学学院,棉花生物学国家重点实验室/河南省植物逆境生物学重点实验室/河南大学生命科学学院,棉花生物学国家重点实验室/河南省植物逆境生物学重点实验室/河南大学生命科学学院,棉花生物学国家重点实验室/河南省植物逆境生物学重点实验室/河南大学生命科学学院

收稿日期:2016-10-15 修回日期:2017-11-21 接受日期:2016-12-23 出版日期:2017-12-14 发布日期:2017-12-14
通讯作者: 李保珠
基金资助:
河南省教育厅科学技术研究重点项目(14A180032)；河南大学科研(zzjj20140055)

Comparative Analysis of Drought Tolerance at Seedling Stage Between Maize‘Zheng58’and‘PH4CV’

李保珠

Received:2016-10-15 Revised:2017-11-21 Accepted:2016-12-23 Online:2017-12-14 Published:2017-12-14

摘要/Abstract

摘要： 为合理利用现有玉米种质资源，培养干旱耐性玉米品系提供理论基础。通过对生长15 天的‘郑58’和‘PH4CV’进行干旱、正常浇水和干旱后复水3 种处理，观察其表型差异及测定与抗旱性相关的生理指标。结果显示，干旱条件下‘PH4CV’苗期叶温较低、离体叶片失水较快。干旱处理5 天后，‘PH4CV’幼苗表现出较‘郑58’更为严重的萎蔫表型，其组织相对含水量较低，积累了较多的H2O2和丙二醛(MDA)，具有更高的电解质渗出率。干旱处理后‘郑58’与‘PH4CV’根冠比均有所增加，而‘郑58’的增加幅度更大。综上所述，‘郑58’苗期干旱处理下各项生理生化指标均显著优于‘PH4CV’，干旱耐性相对较强。

关键词: 块根紫金牛, 块根紫金牛, 种苗, 分级标准, 相关分析, 聚类分析

Abstract: The aims are to rationally use the maize germplasm resource and provide basis for breeding maize varieties with drought tolerance. The 15-day-old seedlings ‘Zheng58’and‘PH4CV’were used as materials for three treatments, drought, normal irrigation, and re-water after drought. The phenotypic difference and drought-relevant physiological indexes were observed. The results showed that, under the drought treatment, leaf temperature of‘PH4CV’seedlings was lower, and water loss was faster in detached leaves of‘PH4CV’. After drought treatment for 5 days, seedlings of‘PH4CV’showed more severe wilting than‘Zheng58’, accompanied with lower relative water content, accumulated more H2O2 and MDA, and had higher ionic leakage level. The root/shoot ratio increased in both‘PH4CV’and‘Zheng58’after drought treatment, and the ratio was much higher in‘Zheng58’. In conclusion, the drought-relevant physiological indexes of‘Zheng58’ are better than that of‘PH4CV’, indicating that the variety has more tolerance to drought stress at seedlings stage.

中图分类号:

S513.035

郭竞选,彭雷,樊若楠,詹启迪,李保珠. 玉米重要种质资源郑58与PH4CV苗期干旱耐性比较分析[J]. 中国农学通报, 2017, 33(35): 18-24.

李保珠. Comparative Analysis of Drought Tolerance at Seedling Stage Between Maize‘Zheng58’and‘PH4CV’[J]. Chinese Agricultural Science Bulletin, 2017, 33(35): 18-24.

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玉米重要种质资源郑58与PH4CV苗期干旱耐性比较分析

Comparative Analysis of Drought Tolerance at Seedling Stage Between Maize‘Zheng58’and‘PH4CV’

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