文献类型：期刊文献

英文题名：Characteristics, Relationships, and Anatomical Basis of Leaf Hydraulic Traits and Economic Traits in Temperate Desert Shrub Species

作者：Tan, Fengsen[1] Cao, Wenxu[1] Li, Xu[1] Li, Qinghe[1]

第一作者：Tan, Fengsen

通信作者：Li, QH[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Efficient Prod Forest Resources, Key Lab Tree Breeding & Cultivat Natl Forestry & G, Beijing 100091, Peoples R China

年份：2024

卷号：14

期号：7

外文期刊名：LIFE-BASEL

收录：;Scopus(收录号：2-s2.0-85199558483);WOS:【SCI-EXPANDED(收录号:WOS:001277073100001)】；

基金：This work was supported by the National Natural Science Foundation of China(No. 31470622)

语种：英文

外文关键词：hydraulic efficiency; hydraulic safety; nutritional element content; leaf thickness; specific leaf area; anatomical structure

摘要：Shrubs are a key component of desert ecosystems, playing a crucial role in controlling desertification and promoting revegetation, yet their growth is often impeded by drought. Leaf hydraulic traits and economic traits are both involved in the process of water exchange for carbon dioxide. Exploring the characteristics, relationships, and anatomical basis of these two suites of traits is crucial to understanding the mechanism of desert shrubs adapting to the desert arid environment. However, the relationship between these two sets of traits currently remains ambiguous. This study explored the leaf hydraulic, economic, and anatomical traits of 19 desert shrub species. The key findings include the following: Relatively larger LT values and smaller SLA values were observed in desert shrubs, aligning with the "slow strategy" in the leaf economics spectrum. The relatively high P50leaf, low HSMleaf, negative TLPleaf, and positive HSMtlp values indicated that severe embolism occurs in the leaves during the dry season, while most species were able to maintain normal leaf expansion. This implies a "tolerance" leaf hydraulic strategy in response to arid stress. No significant relationship was observed between P50leaf and Kmax, indicating the absence of a trade-off between hydraulic efficiency and embolism resistance. Certain coupling relationships were observed between leaf hydraulic traits and economic traits, both of which were closely tied to anatomical structures. Out of all of the leaf traits, LT was the central trait of the leaf traits network. The positive correlation between C content and WPleaf and HSMleaf, as well as the positive correlation between N content and HSMtlp, suggested that the cost of leaf construction was synergistic with hydraulic safety. The negative correlation between SLA, P content, GCL, and SAI suggested a functional synergistic relationship between water use efficiency and gas exchange rate. In summary, this research revealed that the coupling relationship between leaf hydraulic traits and economic traits was one of the important physiological and ecological mechanisms of desert shrubs for adapting to desert habitats.