湖北农业科学 ›› 2020, Vol. 59 ›› Issue (4): 42-44.doi: 10.14088/j.cnki.issn0439-8114.2020.04.008

• 资源·环境 • 上一篇    下一篇

PEG模拟干旱对鲜食木薯华南9号幼苗生长的影响

段元杰1, 孟富宣1, 杨玉皎1, 刘海刚1, 黄洁2, 魏云霞2   

  1. 1.云南省农业科学院热区生态农业研究所/元谋干热河谷植物园,云南 元谋 651300;
    2.中国热带农业科学院热带作物品种资源研究所/农业农村部木薯种质资源保护与利用重点实验室,海南 儋州 571737
  • 收稿日期:2019-05-20 出版日期:2020-02-25 发布日期:2020-05-13
  • 通讯作者: 刘海刚(1982-),男,副研究员,主要从事作物栽培研究,(电子信箱)lhg_728@sina.com。
  • 作者简介:段元杰(1991-),男,云南楚雄人,研究实习员,主要从事作物栽培研究,(电话)15288458687(电子信箱)836908231@qq.com。
  • 基金资助:
    国家现代木薯产业技术体系建设专项(CARS-11-hnhj)

Effects of PEG simulated drought on the growth of fresh-eating Manihot esculenta Crantz SC9 seedlings

DUAN Yuan-jie1, MENG Fu-xuan1, YANG Yu-jiao1, LIU Hai-gang1, HUANG Jie2, WEI Yun-xia2   

  1. 1.Tropical Eco-Agricultural Research Institute,Yunnan Academy of Agricultural Sciences/Yuanmou Dry-Hot Valley Botanical Garden,Yuanmou 651300,Yunnan,China;
    2.Tropical Crops Genetic Resources Institute,Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Conservation and Utilization of Cassava Genetic Resources,Ministry of Agriculture and Rural Affairs,Danzhou 571737,Hainan,China
  • Received:2019-05-20 Online:2020-02-25 Published:2020-05-13

摘要: 以鲜食木薯(Manihot esculenta Crantz)华南9号(SC9)幼苗为材料,用不同浓度的PEG模拟干旱胁迫进行抗旱性研究。结果表明,随着PEG浓度提高,胁迫程度加剧,SC9幼苗叶片脱落数增多,株高增长量、冠面积、地上部分干重、叶片干重、支持结构干重、叶片面积、叶片鲜重逐渐减小,相对电导率逐渐上升,光合色素含量先增加后减小。在干旱胁迫下SC9幼苗通过改变生长状况和叶片生理功能来适应干旱环境,对干旱胁迫具有一定的耐受性。

关键词: 鲜食木薯(Manihot esculenta Crantz)SC9, 干旱胁迫, 生长状况, 生理指标

Abstract: Seedlings of fresh-eating cassava Manihot esculenta Crantz variety South China 9(SC9) were used as materials, different concentrations of PEG were used to study drought resistance under simulated drought stress. The results showed that with the increase of PEG concentration, the drought stress increased, the number of leaf abscission increased, plant height growth, crown area, dry weight of aboveground part, dry weight of leaf, dry weight of supporting structure, leaf area, leaf area, leaf area of SC9 seedlings increased. The fresh weight of the slices decreased gradually, the relative conductivity increased gradually, and the content of photosynthetic pigments increased first and then decreased. That SC9 could adapt to drought environment by changing morphological characteristics, growth indicators and physiological functions of leaves under drought stress, and had good tolerance to drought stress.

Key words: fresh-eating Manihot esculenta Crantz SC9, drought stress, growth condition, physiological index

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