草地学报

草地学报 ›› 2014, Vol. 22 ›› Issue (3): 653-656.DOI: 10.11733/j.issn.1007-0435.2014.03.032

• 研究专报 • 上一篇    下一篇

3种薰衣草光合生理特性对干旱胁迫的响应

孟林, 陈淑燕, 毛培春, 郭强, 田小霞   

  1. 北京市农林科学院 北京草业与环境研究发展中心, 北京 100097
  • 收稿日期:2013-09-12 修回日期:2013-10-23 发布日期:2014-06-04
  • 作者简介:孟林（1966- ），男，内蒙古乌兰察布人，研究员，博士，主要从事草业科学研究，E-mail：menglin9599@sina.com
  • 基金资助:

    北京市农林科学院科技创新能力建设专项（KJCX201101003）（KJCX201201001）；北京市农林科学院草业中心人才培养基金项目资助

Photosynthetic Characteristics of Three Lavender Varieties under Soil Drought Stress

MENG Lin, CHEN Shu-yan, MAO Pei-chun, GUO Qiang, TIAN Xiao-xia   

  1. Beijing Research and development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
  • Received:2013-09-12 Revised:2013-10-23 Published:2014-06-04

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摘要：

采用负水头供水控水装置控制土壤体积含水量，对轻度、中度和重度干旱胁迫40 d后的孟士德薰衣草（Lavandula angustifolia ‘Munstead’）、蝴蝶薰衣草（L. stoechas ‘Pedunculata’）、狭叶薰衣草（L. angustifolia）的叶绿素含量、净光合速率（Pn）、蒸腾速率（Tr）、气孔导度（Gs）、胞间CO2浓度（Ci）和水分利用效率（WUE）等光合生理指标的变化规律进行研究。结果表明：随土壤干旱胁迫程度的增强，蝴蝶薰衣草和狭叶薰衣草的叶绿素含量呈上升趋势，孟士德薰衣草呈下降趋势。3种薰衣草的Pn，Tr和Gs均随土壤干旱胁迫程度的增强呈下降趋势，且胁迫程度越强，下降幅度越大。重度干旱胁迫下，孟士德薰衣草的WUE为5.47 mmol·mol-1，分别是蝴蝶薰衣草和狭叶薰衣草的2.49倍和1.87倍。

关键词: 干旱胁迫, 薰衣草, 光合生理特性

Abstract:

The photosynthetic characteristics including chlorophyll content, net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), inter cellular CO2 consistence (Ci), and water use efficiency (WUE) of three lavender varieties (Lavandula angustifolia ‘Munstead’, L. stoechas ‘Pedunculata’, L. angustifolia) were investigated under light, moderate and severe drought stress for 40 days. Soil volumetric moisture content was controlled using negative pressure water supplying and controlling device. Results showed that the chlorophyll contents of L. stoechas ‘Pedunculata’ and L. angustifolia increased with the increase of soil drought stress, whereas that of L. angustifolia ‘Munstead’ declined. The Pn, Tr and Gs of tested lavender varieties were significantly declined with the increase of soil drought stress. The WUE of L. angustifolia ‘Munstead’ was 5.47 mmol·mol-1 under the heavy stress, was 2.49 and 1.87 times higher than that of L. stoechas ‘Pedunculata’ and L. angustifolia, respectively.

Key words: Drought stress, Lavenders, Photosynthetic characteristics

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