文献类型：期刊文献

中文题名：乌兰布和沙漠10种植物叶片PV曲线水分参数与解剖特征关系

英文题名：Relationship between leaf PV curve water parameters and anatomical characteristics of ten plants spieces in the Ulan Buh Desert

作者：段瑞兵[1,2] 张瑞[2] 王乐乐[2] 张亚鑫[2] 杨战[1] 董雪[1] 马迎宾[1]

第一作者：段瑞兵

机构：[1]中国林业科学研究院沙漠林业实验中心,内蒙古磴口015200;[2]东北林业大学生态研究中心,黑龙江哈尔滨150040

年份：2024

卷号：44

期号：5

起止页码：205-216

中文期刊名：中国沙漠

外文期刊名：Journal of Desert Research

收录：CSTPCD;;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：中央引导地方科技发展资金项目(2021ZY0058);内蒙古自治区自然科学基金项目(2023QN03008,2024MS03038);国家自然科学基金项目(32001374,32101595)。

语种：中文

中文关键词：干旱区;失膨点水势;解剖结构特征;光合作用途径

外文关键词：arid region;turgor loss point;anatomical structure characteristics;photosynthetic pathway

分类号：Q945.78

摘要：灌木在荒漠化防治和植被恢复中发挥着重要作用,特别是在应对气候变化引发的干旱方面。然而,沙漠灌木通过形态和解剖结构特征适应干旱环境的机制仍不清楚。对乌兰布和沙漠10种常见植物在干旱胁迫环境下的叶片压力-容积(PV)曲线水分参数、叶片解剖和结构等特征及其适应机制进行研究。结果显示:(1)10种植物在PV曲线水分参数(PV性状)和解剖特征差异显著。(2)C_(3)植物和C_(4)植物在PV性状、叶片厚度、角质层厚度、比叶面积(SLA)和叶干物质含量(LDMC)等方面存在显著差异。C_(3)植物的失膨点水势(Ψ_(tlp))和饱和含水时的渗透势(Ψ_(0))值较高,但叶片水容(C_(leaf))较低。C_(3)植物的叶片厚度和角质层厚度显著低于C_(4)植物,而SLA和LDMC显著高于C_(4)植物。(3)叶片厚度、栅栏组织和海绵组织与Ψ_(tlp)、C_(leaf)和弹性模量(ε)等PV性状之间存在显著相关关系,并且不同光合作用途径植物叶片解剖特征与PV性状之间的关系表现出差异。
Shrubs play a crucial role in desertification control and vegetation restoration,especially under the influence of drought induced by climate change.However,the morphological and anatomical characteristics of desert shrubs and their adaptation mechanisms remain unclear.In this study,ten common plant spieces were selected from the same site conditions in the Ulan Buh Desert,and were classified into C_(3)and C_(4)plants based on their photosynthetic pathways.We investigated the leaf PV curve water parameters of the plants under drought stress,as well as their leaf anatomy,structure,and adaptation mechanisms.Our results indicate that:(1)There is significant interspecific variation among the ten woody plants in terms of their PV traits and anatomical characteristics.(2)There are significant differences between C_(3)and C_(4)plants in PV traits,leaf thickness,cuticle thickness,specific leaf area(SLA),and leaf dry matter content(LDMC).C_(3)plants exhibit higher values of turgor loss point(Ψ_(tlp))and osmotic potential at full turgor(Ψ_0),but lower leaf water capacity(C_(leaf))compared to C_4plants.The leaf thickness and cuticle thickness of C_(3)plants are significantly lower than those of C_(4)plants,while SLA and LDMC are significantly higher in C_(3)plants.(3)There are significant correlations between leaf thickness,mesophyll structure,andΨ_(tlp),C_(leaf),and modulus of elasticity(ε)among PV traits.Moreover,the relationship between leaf anatomical characteristics and PV traits varies among plants with different photosynthetic pathways.