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Photosynthetic performance along a light gradient as related to leaf characteristics of a naturally occurring Cypripedium flavum
Li, Zhongrong1,2; Zhang, Shibao1; Hu, Hong1; Li, Dezhu1
Corresponding Authorhuhong@mail.kib.ac.cn
2008-11-01
Source PublicationJOURNAL OF PLANT RESEARCH
ISSN0918-9440
Volume121Issue:6Pages:559-569
AbstractPhotosynthesis, leaf structure, nitrogen content and nitrogen allocation in photosynthetic functions of Cypripedium flavum were studied in a naturally varying light regime. Light-saturated leaf net photosynthetic rate (A (max)) was strongly correlated with leaf dry mass per area (LMA), mesophyll conductance (g (m)) and area-based leaf nitrogen content (N-area), with all variables increasing with increasing irradiance. Such coordinate variation of all these parameters illustrates the plastic response of leaf structure to high light (HL). Leaf N-area was greater under HL than in low light (LL). The fractions of leaf nitrogen partitioning in carboxylation (P (R)) and bioenergetics (P (B)) were positively related to LMA. In contrast, P (R) and P (B) decreased with increasing mass-based leaf nitrogen content (N-mass). However, no correlation was found between leaf nitrogen investment in light harvesting (P (L)) and either LMA or N-mass. Like maximum rate of carboxylation (V (cmax)) and electron transport (J (max)), the J (max)/V (cmax) ratio, which was strongly correlated to LMA, also increased significantly with irradiance. Under HL, leaf maximum photosynthetic nitrogen efficiency (ANUE) and intrinsic water use efficiency (WUE) were greater than in LL conditions, despite a small difference in WUE. This suggests that a functional balance in the photosynthetic machinery favors leaf photosynthetic plasticity of C. flavum in response to different light conditions. Given an ample soil nitrogen supply, C. flavum may offset its susceptibility to HL by efficient nitrogen use and higher stomatal and mesophyll conductance against photoinhibition so as to keep leaf photosynthesis positive.
KeywordCypripedium Flavum Endangered Species Leaf Dry Mass Per Area Leaf Nitrogen Partitioning Mesophyll Conductance Photosynthetic Light Responses
Subject AreaPlant Sciences
DOI10.1007/s10265-008-0186-4
Indexed BySCI
Language英语
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000260664800003
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/2469
Collection资源植物与生物技术所级重点实验室
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Li, Zhongrong,Zhang, Shibao,Hu, Hong,et al. Photosynthetic performance along a light gradient as related to leaf characteristics of a naturally occurring Cypripedium flavum[J]. JOURNAL OF PLANT RESEARCH,2008,121(6):559-569.
APA Li, Zhongrong,Zhang, Shibao,Hu, Hong,&Li, Dezhu.(2008).Photosynthetic performance along a light gradient as related to leaf characteristics of a naturally occurring Cypripedium flavum.JOURNAL OF PLANT RESEARCH,121(6),559-569.
MLA Li, Zhongrong,et al."Photosynthetic performance along a light gradient as related to leaf characteristics of a naturally occurring Cypripedium flavum".JOURNAL OF PLANT RESEARCH 121.6(2008):559-569.
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