EVALUATION OF STOMATAL AND NON-STOMATAL LIMITATION IN PHOTOSYNTHETIC INDUCTION RESPONSE OF LEAVES GROWN UNDER DIFFERENT LIHT AND WATER ENVIRONMENTS

不同光照和水环境下叶片光合诱导反应中气孔和非气孔限制的评价

• 批准号: 12640624
• 负责人: YANHONG Tang
• 金额: $ 1.54万
• 依托单位: NATIONAL INSTITUTE FOR ENVIRONMENTAL STUDIES
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640624/
• 关键词: ACCLIMATION; CARBON GAIN; DYNAMIC PHOTOSYNTHESIS; LIGHT ENVIRONMENT; STOMATAL PATCHINESS; SUNFLECKS; VAPOR PRESSURE DEFICIT; WATER AVAILABILITY; サンフレック; 水ストレス; 土壌水分; 高山植物; チベット草原; 草本植物; 光利用効果; 気孔反応; 陽班; 稚樹; ポプラ

To evaluate the stomatal and non-stomatal limitation in photosynthetic induction response for leaves developed under different light and water availabilities, the project used three approaches :(1) Experiment using phytotron and hybrid popular species: Seedlings of the popular species were grown under two light levels (a high-light and a low-light) x two water levels (well-watered and dehydrated) conditions. Although light regimes affected photosynthetic induction efficiency considerably, water availability showed no significant influence. Since stomata of the hybrid species exhibited little response to light change, the induction limitation on leaf carbon gain could be considered as mainly to be due to the biochemical components.(2)Photosynthetic induction response, dynamic photosynthesis and chlorophyll fluorescence response were examined in natural environment for five alpine grassland species on Qinghai-Tibet plateau. The five grasslands species showed no significant difference in induction response and dynamic photosynthetic carbon gain under different soil water availability and vapor pressure deficit during about two weeks.(3)Modeling approach is used to evaluate the effects of stomatal patchiness on photosynthetic induction response and dynamic photosynthesis under different air temperatures. The model consists of two major components : a stomatal component and a biochemical component. Using the improved model, we found that patchiness decreased photosynthetic CO_2 uptake through the decrease of stomatal conductance during the induction response. Induction response showed a more rapid increase in a model leaf experiences an increase of light following a short shade-fleck under a higher temperature.

为评价不同光能和水分条件下叶片光合诱导响应的气孔和非气孔限制，本项目采用三种方法：(1)植生植物和杂交常见种试验：常见种幼苗在两个光照水平（强光和弱光）×两个水分水平（丰水和脱水）条件下生长。虽然光照条件对光合诱导效率有显著影响，但水分有效性对光合诱导效率无显著影响。由于杂交种气孔对光照变化的响应不大，因此叶片碳增益的诱导限制主要是由生物化学成分造成的。在2周左右的时间内，不同土壤水分有效性和水汽压亏缺条件下，5种草地植物的诱导响应和动态光合碳增益均无显著差异。(3)采用建模方法评价不同气温条件下气孔斑块对光合诱导响应和动态光合作用的影响。该模型由两个主要成分组成：气孔成分和生化成分。利用改进的模型，我们发现在诱导响应过程中，斑块通过气孔导度的降低降低了光合作用CO_2的吸收量。诱导响应表明，在较高的温度下，模式叶片经历短暂的遮光斑后，光照增加的速度更快。

项目成果

Tang Y., Okuda T., Awang M., Rahim Nik A., Tani M.: "Sunfleck contribution to leaf carbon gain in tree seedlings from gap and the understory"Ecology of a lowland rainforest in Southeast Asia. (in press). (2003)

Tang Y.、Okuda T.、Awang M.、Rahim Nik A.、Tani M.：“太阳斑点对间隙和林下树苗叶片碳增益的贡献”东南亚低地雨林的生态。

Muraoka, H., Tang Y., Koizumi, H., Washitani, I.: "Effects of light and soil water availability on leaf photosynthesis and growth of Arisaema heterophyllum, a riparian forest understorey plant"Journal of Plant Research. 115. 419-427 (2002)

Muraoka, H., Tang Y., Koizumi, H., Washitani, I.：“光和土壤水分可用性对河岸森林下层植物 Arisaemahetoriphyllum 叶片光合作用和生长的影响”植物研究杂志。

Tang Y., Liang N.: "Characterization of the photosynthetic induction response in a Populus species with stomata barely responding to light changes"Tree Physiology. 20. 959-976 (2000)

Tang Y.，Liang N.：“气孔几乎不响应光变化的杨树光合诱导反应的表征”树木生理学。

Muraoka H., Tang Y., Koizumi H., Terashima I. and Washitani I.: "Contributions of diffusional limitation, photoinhibition and photorespiration to midday depression of photosynthesis of Arisaema heterophyllum in the natural high light"Plant, Cell and Envir

Muraoka H.、Tang Y.、Koizumi H.、Terashima I. 和 Washitani I.：“扩散限制、光抑制和光呼吸对自然强光下异叶天南星光合作用中午抑制的贡献”Plant, Cell and Envir

Muraoka H., Tang Y., Koizumi H. and Washitani I.: "Effects of light and soil water availability on leaf photosynthesis and growth of Arisaema heterophyllum, a riparian forest understorey plant"J Plant Res. 115. 419-427 (2002)

Muraoka H.、Tang Y.、Koizumi H. 和 Washitani I.：“光和土壤水分可用性对河岸森林下层植物 Arisaemaheterophyllum 叶片光合作用和生长的影响”J Plant Res。