论文摘要
Understanding physiological responses and drought adaptation strategies of woody plant leaf traits in sub-humid to semi-arid regions is of vital importance to understand the interplay between ecological processes and plant resource-allocation strategies of different tree species.Seasonal variations of leaf morphological traits, stoichiometric traits and their relationships of two drought tolerant woody species, live oak（Quercus virginiana） and honey mesquite（Prosopis glandulosa） and two less drought tolerant species, sugarberry（Celtis laevigata） and white ash（Fraxinus americana） were analyzed in a sub-humid to semi-arid area of south Texas, USA. Our findings demonstrate that for the two drought tolerant species, the leguminous P. glandulosa had the highest specific leaf area,leaf N, P, and lowest leaf area and dry mass, indicating that P. glandulosa adapts to an arid habitat by decreasing leaf area, thus reducing water loss, reflecting a resource acquisition strategy. While the evergreen species Q. virginiana exhibited higher leaf dry mass, leaf dry matter content, C content, C:N, C:P and N:P ratios, adapts to an arid habitat through increased leaf thickness and thus reduced water loss, reflecting a resource conservation strategy in south Texas. For the two less drought tolerant deciduous species, the variations of leaf traits in C. laevigata and F. americana varied between Q. virginiana and P.glandulosa, reflecting a trade-off between rapid plant growth and nutrient maintenance in a semi-arid environment.
论文目录
文章来源
类型: 期刊论文
作者: Juan Qin,Zhouping Shangguan,Weimin Xi
来源: Journal of Forestry Research 2019年05期
年度: 2019
分类: 农业科技,基础科学
专业: 生物学
单位: School of Resources and Environment, Anhui Agricultural University,Department of Biological and Health Sciences, Texas A&M University-Kingsville,State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University
基金: funded by the China Scholarship Council(CSC),a research award from Texas A&M University-Kingsville,the Natural Science Foundation of Anhui Province(Grant Number 1408085QC57),Youth Science Fund of Anhui Agricultural University(Grant Number 2012zd015)
分类号: Q945
页码: 1715-1725
总页数: 11
文件大小: 1252K
下载量: 11
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