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浙江大学学报（农业与生命科学版）
浙江大学学报(农业与生命科学版)  2013, Vol. 39 Issue (5): 565-574    DOI: 10.3785/j.issn.1008-9209.2013.02.181
资源与环境科学     
干旱半干旱地区植物叶片水分吸收性状
陈林， 杨新国， 宋乃平*， 杨明秀， 肖绪培， 王兴
(宁夏大学,西北退化生态系统恢复与重建教育部重点实验室/西北土地退化与生态恢复省部
共建国家重点实验室培育基地/西部生态与生物资源开发联合研究中心，银川750021)
Leaf water uptake strategy of plants in the arid and semi-arid region of Ningxia
CHEN Lin, YANG Xinguo, SONG Naiping*, YANG Mingxiu, XIAO Xupei, WANG Xing
(Ministry of Education Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in North-Western China / Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration of North-Western China / Union Research Center for Ecology and Exploitation of Biological Resources in Western China，Ningxia University，Yinchuan， 750021，China)
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摘要： 为了研究在干旱半干旱地区植物叶片是否能利用发生频率较高而又无法被植物根系吸收利用的小量级降雨，以宁夏中部干旱半干旱地区50种植物为研究对象，测定叶片的单位面积吸水量(leaf water uptake content, LWUC)、含水量增加率(percentage increase in leaf water content, RW)、水分饱和亏(leaf water saturation deficit, WSD)、叶绿素含量(chlorophyll content, ChlC)、比叶面积(specific leaf area, SLA)和叶片干物质含量(leaf dry material content, LDMC)，分析植物各叶片性状的分布规律及其相互间的关系，并比较不同功能群植物叶片吸水性状的变异特征。模拟结果表明：叶片可以吸收水分，具有利用小量级降水的能力；与其他区域的研究结果相比，研究区50种植物叶片性状值偏小，说明该区域植物能较好地适应贫瘠的环境；叶片性状存在较大的种间差异；不同叶片质地植物的LWUC、RW存在差异，肉质多汁和叶片退化显著高于草质、革质、膜质和纸质者（P<0.05），与WSD相比差异无统计学意义（P>0.05）；不同植物生活型相比，地下芽植物的LWUC、RW和WSD均显著高于地上芽植物（P<0.05）；不同植物生长型物种的LWUC和RW存在显著差异，半灌木植物的LWUC和RW显著高于乔木/小乔木和1年生/2年生草本（P<0.05），而与WSD相比差异无统计学意义（P>0.05）；且不同叶面性状植物的LWUC和RW也有所不同，周身覆毛大于双面覆毛（P>0.05）、单面覆毛（P<0.05）和背被白粉（P<0.05），而与WSD相比差异无统计学意义（P>0.05）。总之，叶片吸水对于干旱半干旱地区植物最大限度地利用有限的水资源具有重要的意义。
Abstract:   The rainfall data were collected and the rainfall pattern was characterized in the arid and semi-arid region of Ningxia.  We found that less rainfall events (<5 mm)   occurred higher frequently. Our objective was to investigate whether the plant leaf can uptake the rainfall that can not be absorbed by plant roots, and to understand leaf water uptake strategy, the relationship between leaf water uptake capability and plant ecological functional types in the arid and semi-arid region of Ningxia. The leaf water uptake content (LWUC), percentage increase in leaf water content (RW), chlorophyll content (ChlC), leaf water saturation deficit (WSD), specific leaf area (SLA) and leaf dry matter content (LDMC) of 50 plants were measured, and patterns of leaf traits were investigated to detect their difference among functional groups and relationships between each trait. The correlation coefficients were calculated between each pair of traits. One-way analysis of variance and Fisher’s multiple comparison, if applicable, were carried out on means of different ecological functional types, for comparing LWUC, RW and WSD. The results showed that the small precipitation could be uptaken  by leaves. Leaf traits of 50 plants were relatively lower compared with the results from other regions,  implying  that the plants could adapt well in poor environment in arid and semi-arid region of Ningxia. There were major interspecific difference in  the leaf traits. LWUC and RW of succulent and aphyllous were all significantly higher than herbaceous, coriaceous, membranous and paper capacitor (P<0.05), and there was no significant difference in  WSD (P>0.05). LWUC, RW and WSD of geophytes were significantly higher than chamaephytes (P<0.05). LWUC and RW of sub-shrubs were significantly higher than arbor/dwarf arbor and annual herbaceous/perennial herbaceous (P<0.05), and there was no significant difference in  WSD (P>0.05).  The LWUC, RW of whole body tomentose were higher than double-sided tomentose (P>0.05), and significantly higher than single-sided tomentose and dorsal dioxide (P<0.05), and there was no significant difference in  WSD (P>0.05). In sum, it’s very important for plants to use the rainfall resources (<5 mm) through leaf water uptake in arid and semi-arid area.
出版日期: 2013-09-20
CLC:  Q 945.79  
基金资助:

国家重点基础研究发展计划（973计划）前期专项资助项目（2012CB723206）；国家科技支撑计划资助项目（2011BAC07B03）。
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杨新国
宋乃平*
陈林
杨明秀
肖绪培
王兴

引用本文:

陈林， 杨新国， 宋乃平*， 杨明秀， 肖绪培， 王兴. 干旱半干旱地区植物叶片水分吸收性状[J]. 浙江大学学报(农业与生命科学版), 2013, 39(5): 565-574.

CHEN Lin, YANG Xinguo, SONG Naiping*, YANG Mingxiu, XIAO Xupei, WANG Xing. Leaf water uptake strategy of plants in the arid and semi-arid region of Ningxia. Journal of Zhejiang University (Agriculture and Life Sciences), 2013, 39(5): 565-574.

链接本文:

http://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2013.02.181    或    http://www.zjujournals.com/agr/CN/Y2013/V39/I5/565

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