Co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China

Abstract Leaf photosynthetic capacity is mainly constrained by nitrogen (N) and phosphorus (P). Little attention has been given to the photosynthetic capacity of mature forests with high calcium (Ca) and magnesium (Mg) in the Karst critical zone. We measured light-saturated net photosynthesis (A sat...

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Autores principales:	Jing Wang, Xuefa Wen, Xinyu Zhang, Shenggong Li, Da-Yong Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/659b943d843c4a5cb5e804f4ac9716f7
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spelling	oai:doaj.org-article:659b943d843c4a5cb5e804f4ac9716f72021-12-02T15:08:26ZCo-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China10.1038/s41598-018-25839-12045-2322https://doaj.org/article/659b943d843c4a5cb5e804f4ac9716f72018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25839-1https://doaj.org/toc/2045-2322Abstract Leaf photosynthetic capacity is mainly constrained by nitrogen (N) and phosphorus (P). Little attention has been given to the photosynthetic capacity of mature forests with high calcium (Ca) and magnesium (Mg) in the Karst critical zone. We measured light-saturated net photosynthesis (A sat), photosynthetic capacity (maximum carboxylation rate [V cmax], and maximum electron transport rate [J max]) as well as leaf nutrient contents (N, P, Ca, Mg, potassium [K], and sodium [Na]), leaf mass per area (LMA), and leaf thickness (LT) in 63 dominant plants in a mature subtropical forest in the Karst critical zone in southwestern China. Compared with global data, plants showed higher A sat for a given level of P. V cmax and J max were mainly co-regulated by N, P, Mg, and LT. The ratios of V cmax to N or P, and J max to N or P were significantly positively related to Mg. We speculate that the photosynthetic capacity of Karst plants can be modified by Mg because Mg can enhance photosynthetic N and P use efficiency.Jing WangXuefa WenXinyu ZhangShenggong LiDa-Yong ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jing Wang Xuefa Wen Xinyu Zhang Shenggong Li Da-Yong Zhang Co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China
description	Abstract Leaf photosynthetic capacity is mainly constrained by nitrogen (N) and phosphorus (P). Little attention has been given to the photosynthetic capacity of mature forests with high calcium (Ca) and magnesium (Mg) in the Karst critical zone. We measured light-saturated net photosynthesis (A sat), photosynthetic capacity (maximum carboxylation rate [V cmax], and maximum electron transport rate [J max]) as well as leaf nutrient contents (N, P, Ca, Mg, potassium [K], and sodium [Na]), leaf mass per area (LMA), and leaf thickness (LT) in 63 dominant plants in a mature subtropical forest in the Karst critical zone in southwestern China. Compared with global data, plants showed higher A sat for a given level of P. V cmax and J max were mainly co-regulated by N, P, Mg, and LT. The ratios of V cmax to N or P, and J max to N or P were significantly positively related to Mg. We speculate that the photosynthetic capacity of Karst plants can be modified by Mg because Mg can enhance photosynthetic N and P use efficiency.
format	article
author	Jing Wang Xuefa Wen Xinyu Zhang Shenggong Li Da-Yong Zhang
author_facet	Jing Wang Xuefa Wen Xinyu Zhang Shenggong Li Da-Yong Zhang
author_sort	Jing Wang
title	Co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China
title_short	Co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China
title_full	Co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China
title_fullStr	Co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China
title_full_unstemmed	Co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China
title_sort	co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical karst forest in china
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/659b943d843c4a5cb5e804f4ac9716f7
work_keys_str_mv	AT jingwang coregulationofphotosyntheticcapacitybynitrogenphosphorusandmagnesiuminasubtropicalkarstforestinchina AT xuefawen coregulationofphotosyntheticcapacitybynitrogenphosphorusandmagnesiuminasubtropicalkarstforestinchina AT xinyuzhang coregulationofphotosyntheticcapacitybynitrogenphosphorusandmagnesiuminasubtropicalkarstforestinchina AT shenggongli coregulationofphotosyntheticcapacitybynitrogenphosphorusandmagnesiuminasubtropicalkarstforestinchina AT dayongzhang coregulationofphotosyntheticcapacitybynitrogenphosphorusandmagnesiuminasubtropicalkarstforestinchina
_version_	1718388124834332672

Co-regulation of photosynthetic capacity by nitrogen, phosphorus and magnesium in a subtropical Karst forest in China

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