干旱区研究

干旱区研究 ›› 2018, Vol. 35 ›› Issue (3): 735-742.doi: 10.13866/j.azr.2018.03.29

• 其他 • 上一篇    下一篇

干旱胁迫下旱砂地籽瓜生理响应及其抗旱性评

杨育苗1, 蒋志荣1, 安力2   

  1. 1.甘肃农业大学林学院,甘肃 兰州 730070;
    2.甘肃农业大学园艺学院,甘肃 兰州 730070
  • 收稿日期:2017-09-13 修回日期:2018-01-05 出版日期:2018-05-15 发布日期:2025-11-17
  • 通讯作者: 蒋志荣.E-mail:jzhirong@gsau.edu.cn
  • 作者简介:杨育苗(1992-),男,在读硕士,主要从事干旱区植物生态学研究.E-mail: 571044550@qq.com
  • 基金资助:
    国家自然科学基金(31422011;31370423);中央高校基本科研业务费(Lzujbky-2016-k12)资助

Physiological Response and Drought Resistance of Seed Watermelons in Dry Sandy Land

YANG Yu-miao1, JIANG Zhi-rong1, AN Li2   

  1. 1. College of Forestry,Gansu Agricultural University,Lanzhou 730070,Gansu,China;
    2. College of Horticulture,Gansu Agriculture University,Lanzhou 730070,Gansu,China
  • Received:2017-09-13 Revised:2018-01-05 Published:2018-05-15 Online:2025-11-17

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摘要： 以靖远旱砂地主栽籽瓜品种“靖远大板”和选育新品种“黑丰1号”为试材,运用大气干旱法以乙烯利作为干燥剂设置7个浓度梯度模拟干旱胁迫,测定2种籽瓜6项生理指标,为丰富旱砂地籽瓜生理生态方面的研究以及当地引进新品种“黑丰1号”提供科学依据。结果表明:① 随着胁迫的加剧,2种籽瓜细胞相对透性、丙二醛(MDA)含量、脯氨酸 (Pro)含量随之升高,叶绿素(CHL)含量随之下降,超氧化物歧化酶 (SOD)、过氧化物酶 (POD)活性呈先升后降趋势;② 2种籽瓜各梯度下叶绿素a/b均大于1,可判定2种籽瓜均为阳性植物,具备在光照充足的靖远县的生长优势;③ 300~500 mg·L-1浓度胁迫下各指标出现明显的变化,该浓度下2种籽瓜对于胁迫反应最明显,而起催熟籽瓜作用的乙烯利浓度为100~300 mg·L-1,催熟时喷施于果实上;胁迫时喷施于叶片上,在生产过程中应格外注意;④ 由主成分分析、隶属函数分析发现“黑丰1号”较“靖远大板”具有更好的耐旱性。同等胁迫条件下“黑丰1号”渗透调节能力更强,保水性更好,在靖远县引种、推广种植是可行的。

关键词: 籽瓜, 生理响应, 乙烯利胁迫, 抗旱性评价, 主成分分析, 隶属函数分析, 灰色关联度分析

Abstract: In this study,an experiment about breeding the new variety “Heifeng 1” and the major local variety “Jingyuan Daban” was carried out so as to enrich the study on the physiological and ecological aspects of seed watermelons and provide the scientific basis for the local introduction of the new variety.In addition,the atmospheric drought method was used to simulate drought stress with ethephon as a desiccant at 7 concentration levels,and the 6 physiological indexes of 2 kinds of seed watermelons were measured and analyzed.The results are as follows: ① The cell relative permeability,MDA content and Pro content of 2 kinds of seed watermelons were increased with the aggravation of drought stress,while the CHL content was decreased.The activities of SOD and POD were increased at first and then decreased; ② The chlorophyll a/b ratios of 2 kinds of seed watermelons were higher than 1 under all the drought stress levels,so it could be determined that both kinds of seed watermelons are sun plants,and Jingyuan County is rich in sunshine which is advantageous for the growth of seed watermelons; ③ Under the drought stress of 300-500 mg·L-1 concentration,6 physiological indexes of drought resistance were changed obviously,which revealed that the response of both kinds of seed watermelons to this concentration is the most sensitive.Moreover,the ethephon concentration for ripening seed watermelons is 100-300 mg·L-1.It should be paid great attention to that ethephon is sprayed on fruits when ripening and on the leaves when stressing drought; ④ The principal component analysis and subordinate function analysis revealed that the drought tolerance of “Heifeng 1” was stronger than that of “Jinyuan Daban”.Under the same drought stress,the osmotic regulation capability and water-retaining property of “Heifeng 1” were high,and it was feasible to introduce and widely plant in Jingyuan County.

Key words: seed watermelon, ethephon stress, drought resistance, principal component analysis, membership function analysis, grey correlation analysis