Acta Agrestia Sinica ›› 2018, Vol. 26 ›› Issue (6): 1444-1448.DOI: 10.11733/j.issn.1007-0435.2018.06.022

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Comparison of Physiological Response and Resistances of Four Paspalum vaginatum to Low Temperature Stress

LI Jing-si1, HUANG Ning1, MA Jia-xin1, SUN Tong1, JIA Zi-shuo1, ZHANG Tian1, WANG Ya-jiao2, SUN Xin-bo1   

  1. 1. Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei Province 071001, China;
    2. Journal Publishing Department of Hebei Agricultural University, Baoding, Hebei Province 071001, China
  • Received:2018-07-18 Revised:2018-10-30 Online:2018-12-15 Published:2019-01-28

4个海滨雀稗对低温胁迫的生理响应及抗寒性比较

李静思1, 黄宁1, 麻加欣1, 孙铜1, 贾子硕1, 张钿1, 王雅娇2, 孙鑫博1   

  1. 1. 河北农业大学河北省作物生长调控重点实验室, 河北 保定 071001;
    2. 河北农业大学期刊社, 河北 保定 071001
  • 通讯作者: 孙鑫博
  • 作者简介:李静思(1996-),女,河北正定人,本科,主要从事草坪草抗逆生理研究,E-mail:1582055268@qq.com
  • 基金资助:
    大学生创新创业训练计划项目(2018134);国家自然科学基金(31701955);河北省自然科学基金优秀青年项目(C2018204056);河北省高等学校科学技术研究项目(Z2017004)资助

Abstract: Four Paspalum vaginatum cultivars were used in this study to investigate the effect of low temperature stress on Paspalum vaginatum physiological response,and then we evaluate the cold resistance of these four cultivars. The results showed that the leaf chlorophyll content increased with the time of chilling treatment and PL,Sa had higher chlorophyll content than other two cultivars. Relative electrolyte leakage,MDA content increased under low temperature condition. After 28 d of treatment,relative electrolyte leakage and MDA content in Sa cultivar are significant lower than that in other three cultivars,respectively. H2O2 and O2- content increased under low temperature stress. No significant difference of O2- was found between four cultivars,whereas PL and SP had significantly lower H2O2 content compare with other two cultivars. SOD activity of all cultivars tends to remain consistent first increase,second decrease and then increase. POD activity increased in all cultivars under low temperature condition. CAT and APX activities were decreased in all cultivars under low temperature condition. No significant difference of CAT activity was found between four cultivars whereas APX activity in SI cultivars was significantly higher than that in other three cultivars. Taken together,Sa has better cold resistance than the other three cultivars.

Key words: Low temperature stress, Paspalum vaginatum, Antioxidant enzyme, Reactive oxygen species

摘要: 为比较不同品种海滨雀稗的抗寒性,以4个品种的海滨雀稗为供试材料,探讨低温胁迫(4℃)对海滨雀稗的生理影响,并对4个品种的海滨雀稗的抗寒性进行了比较。结果表明低温胁迫能够使海滨雀稗的叶绿素含量增加,处理28d后,PL和Sa的叶绿素含量最高。低温胁迫能够使海滨雀稗的相对电导率和MDA含量增加,在处理第28 d时,Sa的相对电导率和MDA含量显著低于其他品种。海滨雀稗的H2O2和O2-含量随着低温处理而增加,处理28 d后4个品种间的O2-含量没有显著差异,PL和SP品种的H2O2含量显著低于其他两个品种。低温使海滨雀稗的SOD活性呈现先升后降,然后再升高的趋势,处理后第28 d,4个品种间没有显著差异;低温胁迫能够使海滨雀稗的POD活性升高,但品种间没有显著差异;低温可以降低海滨雀稗CAT和APX的活性,其中CAT活性4个品种之间没有显著差异,而SI品种的APX活性显著高于其他品种。综合各项生理指标,Sa品种的抗寒性较好。

关键词: 低温胁迫, 海滨雀稗, 抗氧化酶, 活性氧

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