J Integr Plant Biol. ›› 2002, Vol. 44 ›› Issue (1): 97-100.

• Research Articles • Previous Articles     Next Articles

Architectural Plasticity in Response to Soil Moisture in the Stoloniferous Herb, Duchesnea indica

LUO Xue-Gang and DONG Ming   

Abstract:

Architectural plasticity of clonal plants may enhance exploitation of soil moisture heterogeneity by the plants. The plasticity of clonal architecture in response to soil moisture in the stoloniferous herb, Duchesnea indica Focke, was investigated in an experiment with different soil moisture contents as treatments, i.e. 40%, 60%, 80%, 100% of the maximum moisture content of soil (MMCS). As soil moisture content increased, the spacer length, ramet density, branching intensity and branching angle of D. indica plants changed by quadratic curve. And the optimum habitat for the plants was at 80% of the MMCS. This architectural plasticity in D. indica was simulated through the Dynamic Logistic Model. The imitative effect was statistically satisfactory. Its architectural plasticity observed here may allow the species to show foraging behavior in its habitat where soil moisture is patchily distributed.

 

匍匐茎草本蛇莓克隆构型对土壤水分的可塑性反应
罗学刚1,2 董鸣1*
(1. 中国科学院植物研究所植被数量生态学开放实验室, 北京 100093; 2. 西南科技大学, 绵阳 621000)
 
克隆植物构型的可塑性有可能促进它对斑块性分布土壤水分资源的利用, 因而可能具有生态学意义。在田间实验中,匍匐茎草本蛇莓(Duchesnea indica Focke)经历了不同土壤水分水平(土壤最大含水量的40%、60%、80%、100%等)处理,以研究土壤水分对蛇莓克隆构型的影响。结果表明:间隔子长度、分株密度、分枝角度和分枝强度呈二次曲线变化,土壤含水量为最大含水量的80%的生境为最适。在不同土壤水分水平生境中,蛇莓克隆构型相关特征的可塑性变化可用动态Logistic 模型进行模拟和预测,拟合效果较好。结合植物对环境异质性的利用对策,对所揭示的蛇莓克隆构型可塑性进行了讨论。
 
关键词:蛇莓;克隆植物;土壤水分;克隆构型;可塑性
 
通讯作者E-mail: dongming@public.east.net.cn

 

Key words: Duchesnea indica, clonal plant, soil moisture, clonal architecture, plasticity

Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail: jipb@ibcas.ac.cn
Copyright © 2022 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q
备案号:京ICP备16067583号-22