Mechanical shaking and soil water affect the growth of Psammochloa villosa in the Mu Us Sandland

被引：12

作者：

Wang, Y. -H. ^{[1
,2
]}

Dong, M. ^{[1
]}

Yu, F. -H. ^{[3
]}

Jiang, H. ^{[2
]}

Yu, S. -Q ^{[2
]}

Lin, X-Q. ^{[2
]}

He, W. -M. ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China

[2] Zhejiang Agr & Forestry Univ, Zhejiang Prov Key Lab Carbon Cycling Forest Ecosy, Hangzhou 311300, Zhejiang, Peoples R China

[3] Beijing Forestry Univ, Coll Nat Conservat, Beijing 100083, Peoples R China

来源：

JOURNAL OF ARID ENVIRONMENTS | 2011年 / 75卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Growth; Psammochloa villosa; Suppression; Thigmomorphogenesis; Water; BIOMASS ALLOCATION; WIND; THIGMOMORPHOGENESIS; STRESS; FIELD;

D O I：

10.1016/j.jaridenv.2011.04.019

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The Mu Us Sandland is basically characterized by water shortage and high wind. Thus, wind-induced mechanical perturbation (MP) and soil water availability are likely to interact to affect plant growth. Since high water availability and MP can induce responses that are in the opposite direction, we hypothesized that MP effects on perennial grasses might be mitigated by increased soil water availability in the Mu Us Sandland. We counducted an experiment in which seedlings of Psammochloa villosa were subjected to two levels of MP (non-MP vs. MP 1 min d(-1)) and two levels of water availability (200 ml d(-1) vs. 400 ml d(-1)) and measured three plant traits. MP significantly decreased plant height, total biomass, and root/shoot ratio. There were significant interactions between MP and soil water availability on plant height and root/shoot ratio. These findings imply that MP alone is a stressful factor for P. villosa and MP effects on its growth can be partially mitigated by increased soil water availability, and also suggest that P villosa may respond to MP in a way that allows plants to survive in the windy semiarid environments. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：974 / 977

页数：4

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