欢迎访问《植物研究》杂志官方网站,今天是 分享到:

植物研究 ›› 2021, Vol. 41 ›› Issue (6): 947-956.doi: 10.7525/j.issn.1673-5102.2021.06.013

• 研究报告 • 上一篇    下一篇

干旱胁迫对杜仲叶片结构特征的影响

何凤1,2, 杜红岩1, 刘攀峰1, 王璐1, 庆军1, 杜兰英1()   

  1. 1.中国林业科学研究院 经济林研究开发中心,国家林业和草原局 杜仲工程技术研究中心,郑州 450003
    2.南京林业大学,南京 210037
  • 收稿日期:2020-02-28 出版日期:2021-11-20 发布日期:2021-10-29
  • 通讯作者: 杜兰英 E-mail:dly371@126.com
  • 作者简介:何凤(1988—),女,博士研究生,主要从事杜仲育种与栽培。
  • 基金资助:
    “十三五”国家重点研发计划项目“橡胶用和药用杜仲定向培育与高效利用关键技术研究”(2017YFD0600702);国家自然科学基金面上项目(31370682)

Effects of Drought Stress on Leaf Structure of Eucommia ulmoides

Feng HE1,2, Hong-Yan DU1, Pan-Feng LIU1, Lu WANG1, Jun QING1, Lan-Ying DU1()   

  1. 1.Non-timber Forest Research and Development Center,Chinese Academy of Forestry,the Eucommia Engineering Research Center,State Administration of Forestry and Grassland,Zhengzhou 450003
    2.Nanjing Forestry University,Nanjing 210037
  • Received:2020-02-28 Online:2021-11-20 Published:2021-10-29
  • Contact: Lan-Ying DU E-mail:dly371@126.com
  • About author:HE Feng(1988—),female,PhD student,majoring in Eucommia ulmoides breeding and cultivation.
  • Supported by:
    National Key R&D Program of China “Study on the key technologies of directed cultivation and efficient utilization of Eucommia ulmoides for rubber and medicinal use”(2017YFD0600702);National Natural Science Foundation of China(31370682)

摘要:

以2年生‘华仲6号’扦插幼苗为试验材料,研究不同干旱胁迫时间对杜仲扦插幼苗叶片结构的影响,了解其干旱适应特征。结果表明:与对照相比较,干旱胁迫16 d才导致叶片相对含水量、海绵组织厚度、下表皮厚度显著降低;在干旱胁迫过程中,叶片气孔密度表现为先升后降的趋势,而由气孔面积、气孔长度和气孔宽度表示的气孔大小则表现为增—减—增的趋势,且气孔长宽与气孔密度均呈显著的负线形相关。杜仲扦插幼苗厚度变薄的主要原因是海绵组织厚度变小,在干旱胁迫11 d时,叶片气孔产生小而密、气孔闭合增多的生态适应特征,在干旱胁迫16 d时气孔则呈现大而疏的适应特征。

关键词: 杜仲, 干旱胁迫, 叶片结构, 气孔

Abstract:

To explore the effects of drought stress on leaf structure of Eucommia ulmoides and understand the characteristics of drought adaptation, 2-year-old cutting seedlings of ‘Huazhong No.6’ were used as experimental materials. The results showed the leaf relative water content, sponge tissue thickness and lower epidermis thickness were significantly lower on the 16th day of drought stress compared with the control group respectively. During the drought stress, the stomatal density of leaves increased at first and then decreased, while the stomatal size expressed by stomatal area, stomatal length and stomatal width pointed a trend of “increase-decrease-increase” and there was a significant negative linear correlation among stomatal length and width and stomatal density. The main reason of the cutting seedling thickness thinning of Eucommia ulmoides was that the sponge tissue thickness became smaller. Under drought stress for 11 days, the stomata of leaves were small and dense, the stomata closure increased, while the stomata showed larger and sparser adaptation characteristics for 16 days under drought stress.

Key words: Eucommia ulmoides, drought stress, leaf structure, stomata

中图分类号: