NDLI: Photosynthetic response of Fragaria orientalis in different water contrast clonal integration

Content Provider	Springer Nature Link
Author	Zhang, Yunchun Zhang, Qiaoying Luo, Peng Wu, Ning
Copyright Year	2008
Abstract	The capacity to exchange resources and non-resource agents is one of the most outstanding features of clonal plants. Contrast between patches in a heterogeneous environment is the main external driving force behind integration effects. It was hypothesized, on the basis of the source–sink hypothesis, that assimilate demand from drought-stressed ramets will result in enhancement of the photosynthesis of well-watered ramets by a mechanism of feedback regulation, that the negative effect of drought on the photosynthesis of drought-stressed ramets will be ameliorated by physiological integration, and that these effects will be enhanced by increasing contrast. A pot experiment was conducted with clonal fragments consisting of two interconnected ramets of Fragaria orientalis. In the experiment, both the connected and the disconnected clonal fragments were divided into three water contrast groups: (1) homogeneous (no contrast) group; (2) low-contrast group; (3) high-contrast group. The photosynthesis and stress tolerance of drought-stressed ramets did not decrease under the support of well-watered ramets when they were connected, allowing clones to maintain their performance in less favorable environments. But the photosynthesis and stress tolerance of drought-stressed ramets decreased with increasing drought-stress when stolons were disconnected. With a feedback regulation process, the photosynthesis of well-watered ramets connected to drought-stressed ramets was enhanced by the latter, which can compensate, at least partially, for the cost of maintaining the stressed ramets. Drought-stressed ramets gained more benefits in a high-contrast environment than in a lower-contrast environment; this can enhance the survival of drought-stressed ramets in unfavorable habitats, especially stressed patches that would otherwise be unexploitable by independent ramets. But photosynthesis of well-watered ramets did not increase with increasing water availability contrast. It can be concluded that photosynthesis and stress tolerance of F. orientalis was affected by clonal integration and by contrasts of water availability.
Starting Page	617
Ending Page	625
Page Count	9
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	24
Issue Number	3
e-ISSN	14401703
Language	English
Publisher	Springer Japan
Publisher Date	2008-08-13
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Clonal plant Physiological integration Drought Heterogeneous environment Forestry Behavioural Sciences Evolutionary Biology Zoology Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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Acknowledgements to Reviewer

List of reviewers

Photosynthetic response of Fragaria orientalis in different water contrast clonal integration

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Acknowledgements to Reviewer

List of reviewers

Photosynthetic response of Fragaria orientalis in different water contrast clonal integration