Acta Agrestia Sinica ›› 2017, Vol. 25 ›› Issue (4): 796-802.DOI: 10.11733/j.issn.1007-0435.2017.04.016

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The Physiological Response of the Warm-season Turfgrass Cynodon dactylon Accessions to Acidity and Aluminum Stress

HUANG Chun-qiong, CHEN Zhen, LIU Guo-dao, BAI Chang-jun   

  1. Tropical Crops Genetic Resources Institute/Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture, Danzhou, Hainan Province 571737, China
  • Received:2016-06-21 Revised:2017-03-29 Online:2017-08-15 Published:2017-11-01

暖季型草坪草狗牙根对酸铝胁迫的生理响应

黄春琼, 陈振, 刘国道, 白昌军   

  1. 中国热带农业科学院热带作物品种资源研究所/农业部华南作物 基因资源与种质创制重点实验室, 海南 儋州 571737
  • 作者简介:黄春琼(1982-),女,云南宣威人,博士,副研究员,研究方向为热带牧草种质资源与育种,E-mail:huangchunqiong44@163.com
  • 基金资助:

    中央级公益性科研院所基本科研业务费专项资金(1630032014028);现代农业产业技术体系建设专项(No.CARS-35);农业部物种资源保护项目“热带牧草种质资源保护”资助

Abstract:

Five Al-tolerant and Al-sensitive Cynodon dactylon accessions selected based on the preliminary study were planted in acidity and aluminum soil. The physiological index of the total chlorophyll content, relative electrical conductivity, MDA (malondialdehyde) content, SOD (superoxide dismutase) activity, POD (peroxidase) activity, proline content and total soluble sugar content were assessed after growing in acidity and aluminum soil for 28 days in order to study the physiological responses of Cynodon dactylon accessions. The results showed that the total chlorophyll and soluble sugar content were reduced under acidity and aluminum stress, and the reduced range of sensitive accessions was greater than that of the tolerant accessions; the relative electrical conductivity, MDA content, SOD activity, POD activity, and proline content increased under aluminum stress, and the increased range of tolerant accessions was higher than that of the sensitive, suggesting that Cynodon dactylon could alleviate the effects of acidity and aluminum stress by increasing antioxidant enzyme activities.

Key words: Cynodon dactylon accessions, Acidity and aluminum stress, Physiological response

摘要:

本研究将前期研究筛选出的5份耐铝及5份铝敏感狗牙根[Cynodon dactylon(Linn.)Pers.]种植于酸铝土壤上,通过测定叶绿素、电导率、丙二醛、过氧化物酶、超氧化物歧化酶、游离脯氨酸、可溶性总糖含量等7个生理指标,研究其对酸铝胁迫的生理响应情况,结果表明:酸铝胁迫引起狗牙根叶绿素和可溶性糖含量降低,铝敏感种质降低幅度较大;电导率、丙二醛、过氧化物酶、超氧化物歧化酶及脯氨酸含量增加,耐铝种质增加幅度较大,说明狗牙根可以通过增加抗氧化酶的活性来降低所受酸铝胁迫的危害。

关键词: 狗牙根, 酸铝胁迫, 生理响应

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