[1]ZHANG Junbin,CHEN Yichang,LIN Xinhui,et al.Study on the Growth Activity Responses of Three Native Trees to Stress for Middle and Low Elevation in Taiwan[J].Research of Soil and Water Conservation,2002,9(03):136-145.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
9
Number of periods:
2002年03期
Page number:
136-145
Column:
Public date:
1900-01-01
- Title:
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Study on the Growth Activity Responses of Three Native Trees to Stress for Middle and Low Elevation in Taiwan
- Author(s):
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ZHANG Junbin1, CHEN Yichang2, LIN Xinhui1, CHEN Fangqiong1
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1. Department of Soil and Water Conservation, Chung Hsing University, Taichung 0, Taiwan, China;
2. "Land Consolidation Engineering Bureau, Ministry of Interior Affairs", Taiwan 402, China
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- Keywords:
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native plant; stress; growth activity
- CLC:
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S796
- DOI:
-
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- Abstract:
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Three native trees, Formosan Michelia, Taiwan Incense-cedar and Large-leaved Nanmu, were chosen to test their physiological responses to different environmental stresses, including drought stress.Responses of photosynthetic gas exchange and chlorophyll fluorescence following drought acclimation were measured to understand the adaptative responses to water stress.According to the photosynthetic responses to irradiance, Formosan Michelia and Taiwan Incense-cedar had higher photosynthetic rates at low light intensity than Large-leaved Nanmu.In addition, Large-leaved Nanmu was more sensitive to light intensity.The photosynthesis optimum temperature was 30℃ for Formosan Michelia and Taiwan Incense-cedar and 32℃ for Large-leaved Nanmu.After three months of the drought acclimation treatment, trees of Taiwan Incense-cedar and Formosan Michelia were better able to acclimate in morphology including height, ground diameter, root-shoot ratio and specific leaf weight.During water withholding treatment, acclimated trees that displayed higher photosynthetic capacity under high soil water potential were more drought resistant.The Ci/Ca ratios of acclimated trees were lower than those of controls.This implied that stomatal regulation of photosynthesis in acclimated trees was important in controlling the photosynthetic rate.The leaf conductance of acclimated Taiwan Incense-cedar was lower than the controlable which showed a greater adaptive response to water stress.