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Plant Diversity ›› 2015, Vol. 37 ›› Issue (2): 168-176.DOI: 10.7677/ynzwyj201514089

• 研究论文 • 上一篇    下一篇


 胡静1、2, 胡虹1   

  1. 1 中国科学院昆明植物研究所资源植物与生物技术所级重点实验室,昆明650201;
     2 中国科学院研究生院,北京100049
  • 收稿日期:2014-06-16 出版日期:2015-03-25 发布日期:2014-10-27
  • 基金资助:

    The Yunnan Tobacco Academy of Agriculture[Grantnumbers 110201101003 (TS03), 2011YN02, and 2011YN03]

Viewing Leaf Shape and Size Variation in Tobacco Plants under Different Temperatures from a Hydraulic Perspective

 HU  Jing-1、2, HU  Hong-1   

  1. 1Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences,
    Kunming 650201, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-06-16 Online:2015-03-25 Published:2014-10-27
  • Supported by:

    The Yunnan Tobacco Academy of Agriculture[Grantnumbers 110201101003 (TS03), 2011YN02, and 2011YN03]


叶片形状和大小在不同的生长温度下变化非常大,但少有从水力结构的角度解释其变化原因的研究。本研究测定了生长于两个不同温度下 (24℃/18℃昼/夜; 32℃/26℃昼/夜) 的烟草叶片的解剖结构,导水率,叶片长宽比和叶面积。生长在24℃/18℃下的烟草叶片与生长在32℃/18℃的叶片相比,更狭窄,并有更小的叶柄导管直径,更低的叶脉密度和导水率。然而,在不同的生长温度下,烟草叶面积并没有显著差异。叶片导水率与叶脉密度呈正相关,但与叶片长宽比呈负相关。结果表明在不同的生长温度下叶片解剖结构和叶片导水率可能对于改变叶宽比起着重要作用。

关键词: 温度, 叶片解剖, 叶片导水率, 叶片形状, 叶片大小, 烟草


Although leaf shape and size are highly variable across different temperatures, few studies have investigated the reasons for their variations from the hydraulic perspective. We hypothesized that temperature will induce the modification of leaf waterrelated anatomy and leaf hydraulic conductance, which may play an important role in affec
ting leaf shape and size. Narrow and small leaf might be an adaptation to low water transport capacity under low temperature, making the whole leaf obtain water more uniformly. To test the above hypothesis, we investigated leaf anatomy, leaf hydraulic conductance, leaf shape and size of tobacco under two growth temperatures (24℃/18℃ day/night; 32℃/26℃ day/night) and analyzed the associations between leaf hydraulic architecture and leaf lengthtowidth ratio. We found that the tobacco leaves at 24℃ were significantly narrower, and had smaller petiole vessel diameter, lower minor vein density and hydraulic conductance compared with those at 32℃. However, there was no significant difference in leaf size between two temperatures. Leaf hydraulic conductance was positively correlated with minor vein density, but negatively with leaf lengthtowidth ratio. Our results suggested that the modification of leaf anatomy and leaf hydraulic conductance might play an important role in affecting leaf shape under different temperatures.

Key words: Leaf anatomy, Leaf hydraulic conductance, Leaf shape, Leaf size, Nicotiana tabacum Temperature