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Determination of leaf carbon isotope discrimination in C4 plants under variable N and water supply
Yang, Hao1; Yu, Qiang2; Sheng, Wen-ping1; Li, Sheng-gong1; Tian, Jing1
2017-03-23
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume7Pages:8
Corresponding AuthorYang, Hao(yangh@igsnrr.ac.cn)
AbstractUnderstanding the mechanisms underlying variations in carbon isotope discrimination (Delta) in C4 plants is critical for predicting the C3/C4 ratio in C3/C4 mixed grassland. The value of Delta is determined by bundle sheath leakiness (Phi) and the ratio of intercellular to ambient CO2 concentration (Ci/Ca). Leaf nitrogen concentration (N-leaf) is considered a driver of Delta in C4 plants. However, little is known about how N-leaf affects Phi and Ci/Ca, and subsequently.Delta Here leaf carbon isotope composition, N-leaf,Phi, and leaf gas exchange were measured in Cleistogenes squarrosa, a dominant C4 species in the Inner Mongolia grassland.Delta remained relatively stable under variable N and water supply. Higher N supply and lower water supply increased N-leaf, stimulated photosynthesis and further decreased Ci/Ca. High N supply increased Phi, which responded weakly to water supply. N-leaf exerted similar effects on Ci/Ca and on Phi in the field and pot experiments. Pooling all the data, N-leaf explained 73% of the variation in Ci/Ca. Overall, both Phi and Ci/Ca determined Delta; however, the contribution of Phi was stronger. N-leaf influenced Delta primarily though Ci/Ca, rather than Phi.Phi should be considered in estimating Delta of C4 endmember.
DOI10.1038/s41598-017-00498-w
WOS KeywordINNER-MONGOLIA GRASSLAND ; BUNDLE-SHEATH LEAKINESS ; COMBINED GAS-EXCHANGE ; C-4 PHOTOSYNTHESIS ; STOMATAL CONDUCTANCE ; USE EFFICIENCY ; NITROGEN ; CO2 ; PRECIPITATION ; ECOSYSTEM
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[31290221] ; National Natural Science Foundation of China[31100336] ; National Natural Science Foundation of China[31670486] ; National Natural Science Foundation of China[31130009]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000397096800007
PublisherNATURE PUBLISHING GROUP
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/64804
Collection中国科学院地理科学与资源研究所
Corresponding AuthorYang, Hao
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Observat & Modeling, Beijing 100101, Peoples R China
2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Nat Hulunber Grassland Ecosyst Observat & Res, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Yang, Hao,Yu, Qiang,Sheng, Wen-ping,et al. Determination of leaf carbon isotope discrimination in C4 plants under variable N and water supply[J]. SCIENTIFIC REPORTS,2017,7:8.
APA Yang, Hao,Yu, Qiang,Sheng, Wen-ping,Li, Sheng-gong,&Tian, Jing.(2017).Determination of leaf carbon isotope discrimination in C4 plants under variable N and water supply.SCIENTIFIC REPORTS,7,8.
MLA Yang, Hao,et al."Determination of leaf carbon isotope discrimination in C4 plants under variable N and water supply".SCIENTIFIC REPORTS 7(2017):8.
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