Effects of Groundwater Level on Morphological, Anatomical Structure and Leaf Hydraulic Conductance of Populus euphratica

doi:10.7522/j.issn.1000-694X.2015.00123

JOURNAL OF DESERT RESEARCH ›› 2016, Vol. 36 ›› Issue (5): 1302-1309.DOI: 10.7522/j.issn.1000-694X.2015.00123

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Effects of Groundwater Level on Morphological, Anatomical Structure and Leaf Hydraulic Conductance of Populus euphratica

Wang Rizhao^1,2, Chen Yapeng¹, Chen Yaning¹, Pan Yingping^1,2, He Guangzhi³

1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. College of Pratacultural and Environmental Science, Xinjiang Agricultural University, Urumqi 830052, China

Received:2015-05-28 Revised:2015-07-14 Online:2016-09-20 Published:2016-09-20

Abstract

Abstract: Structure is the basis of function, morphological and anatomical structure of photosynthetic organ can indicate their leaf hydraulic conductance (K_leaf). In this paper, the relationships between morphological, anatomical structure parameters and leaf maximum hydraulic conductance (K_leaf-max) were analyzed at different groundwater depths in the lower reaches of Tarim River. The results showed that:(1) Populus euphratica leaf exhibited obvious xeric structure:leaf was thick and isobilateral, and the upper and lower epidermis were made up of two-storey cell. There were highly developed palisade tissue, highly developed leaf vein, sunken stomata and two types of crystals:prismatic crystal and clustered crystal in the mesophyll cells. (2) The study showed that leaf thickness (LT), epidermal thickness (ET), palisade tissue thickness (PT), the ratio of palisade tissue thickness to spongy tissue thickness (PT/ST), leaf vein density (LVD), major vein vessel diameter (MVD), stomatal density (SD) increased, stomatal area (SA) decreased as the groundwater depth increased. So we concluded that Populus euphratica changed the morphological and anatomical structure and leaf hydraulic conductance to adapt drought. (3) K_leaf-max showed significant positive correlations with LT, ET, PT, PT/ST, LVD, MVD, SD(P<0.01), while showing significantly negative correlation with SA (P<0.01). These indicted that the character of morphological and anatomical structure was the basis of P.euphratica leaf hydraulics.

Key words: Populus euphratica, morphological and anatomical structure, leaf hydraulic conductance, Tarim River

CLC Number:

Q948.11

Wang Rizhao, Chen Yapeng, Chen Yaning, Pan Yingping, He Guangzhi. Effects of Groundwater Level on Morphological, Anatomical Structure and Leaf Hydraulic Conductance of Populus euphratica[J]. JOURNAL OF DESERT RESEARCH, 2016, 36(5): 1302-1309.

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Effects of Groundwater Level on Morphological, Anatomical Structure and Leaf Hydraulic Conductance of Populus euphratica

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