The study of a determinate growth orchid highlights the role of new leaf production in photosynthetic light acclimation
Zhang, Wei1,2,3; Huang, Wei1,2; Zhang, Shi-Bao1,2
2017-08-01
发表期刊PLANT ECOLOGY
ISSN1385-0237
卷号218页码:997-1008
摘要Plants usually respond to the changes of growth irradiance by a combination of the physiological modifications in their preexisting leaves and the production of new leaves. However, those with a determinate growth habit produce certain number of leaves in a growing season and cannot produce new leaves when light condition changes. We used an epiphytic orchid with only one leaf produced every growing season to examine whether and how determinate growth species adapt to changing environments after their preexisting leaves mature. Leaf photosynthesis and anatomy of Pleione aurita were investigated at full expansion and at 40 days after the fully expanded leaves were transferred from high to low light or from low to high light. Leaves show large physiological and morphological plasticity to light gradients at full expansion and the transferred leaves exhibited multiple physiological modifications, including reallocation of nitrogen between light harvesting and carbon fixation, and enhancement of thermal dissipation in their new environments, to optimize carbon assimilation and avoid photoinhibition. Irrespective of the various changes either to shade or sun, the sole preexisting leaf could not fully acclimate to new light environments due to the mesophyll thickness constraint. This leads to the consequence that only plants exposed to high light throughout the experiment had a positive annual biomass gain. Our results highlighted the importance of new leaf production in the carbon accumulation during photosynthetic light acclimation, and contribute new insights of epiphytes physiological responses to their highly dynamic arboreal habitat.
关键词Carbon Starvation Carry-over Effect Epiphytic Plant Leaf Anatomy Leaf Production Light Acclimation
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/54938
专题资源植物与生物技术所级重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming 650201, Yunnan, Peoples R China
2.Yunnan Key Lab Wild Plant Resources, Kunming 650201, Yunnan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Zhang, Wei,Huang, Wei,Zhang, Shi-Bao. The study of a determinate growth orchid highlights the role of new leaf production in photosynthetic light acclimation[J]. PLANT ECOLOGY,2017,218(8):997-1008.
APA Zhang, Wei,Huang, Wei,&Zhang, Shi-Bao.(2017).The study of a determinate growth orchid highlights the role of new leaf production in photosynthetic light acclimation.PLANT ECOLOGY,218(8),997-1008.
MLA Zhang, Wei,et al."The study of a determinate growth orchid highlights the role of new leaf production in photosynthetic light acclimation".PLANT ECOLOGY 218.8(2017):997-1008.
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