Does foliar nutrient resorption regulate the coupled relationship between nitrogen and phosphorus in plant leaves in response to nitrogen deposition?
Does foliar nutrient resorption regulate the coupled relationship between nitrogen and phosphorus in plant leaves in response to nitrogen deposition?
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叶面养分重吸收是否调节植物叶片中氮磷之间的耦合关系以响应氮沉降？
DOI：
10.1016/j.scitotenv.2018.07.186
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发表时间：
2018-12
影响因子：
9.8
通讯作者：
Changkun Fu
中科院分区：
文献类型：
--
作者：
Chengming You;Fuzhong Wu;Wanqin Yang;Zhenfeng Xu;Bo Tan;Li Zhang;Kai Yue;Xiangyin Ni;Han Li;Chenhui Chang;Changkun Fu
衰老叶片的养分再吸收是植物体内养分循环的重要过程，但氮沉降对植物叶片养分再吸收的影响及其与氮磷的耦合关系尚不清楚。本文基于一项综合荟萃分析，分析了不同养分限制条件下，氮素添加对植物叶片养分再吸收的影响以及氮、磷之间的耦合关系。在自然条件下，全球平均氮吸收效率（NRE）和磷吸收效率（PRE）分别为47.4%和53.6%，受地理气候因素和植物特性的显著影响。此外，在全球范围内，N添加显著降低了NRE 13.3%，但对PRE影响不大，并且N添加率和纬度直接影响N添加对NRE的影响。具体而言，氮添加显着降低NRE在所有营养限制条件下，而它有负面的，积极的，和中性的影响，在氮限制，磷限制，N和P共同限制条件下，分别对PRE。此外，在自然生态系统中，不同营养限制条件下，绿色和衰老叶片中N和P的关系是紧密耦合的。施氮显著削弱了绿色叶片中氮磷浓度的相关性，但对衰老叶片中氮磷浓度的相关性影响不大，这主要是受施氮量对养分再吸收效率的影响，尤其是对NRE的影响。这些结果强调，营养有限的条件下，确定的营养吸收N沉积的反应，并强调营养吸收调节N和P响应N富集耦合的效果。研究结果对于理解植物养分利用策略和N、P化学计量耦合响应气候变化的机制具有重要意义，并可用于全球生态地球化学模型。
Nutrient resorption from senescing leaves is an important process of internal nutrient cycling in plants, but the patterns of nutrient resorption and the coupled relationship between nitrogen (N) and phosphorus (P) in plant leaves as affected by N deposition remain unclear. We analysed the effects of N addition on the nutrient resorption and coupled relationship between N and P in plant leaves under different nutrient-limited conditions based on a global meta-analysis. Globally, the mean N resorption efficiency (NRE) and P resorption efficiency (PRE) under natural conditions were 47.4% and 53.6%, respectively, which were significantly regulated by geographical and climatic factors as well as plant characteristics. Furthermore, N addition significantly decreased the NRE by 13.3% but slightly affected the PRE on a global scale, and N addition rates and latitude directly and negatively affected the effects of N addition on NRE. Specifically, N addition significantly decreased the NRE under all nutrient-limited conditions, while it had negative, positive, and neutral effects on the PRE under N-limited, P-limited, and N and P-co-limited conditions, respectively. Moreover, the relationships between N and P in green and senesced leaves were tightly coupled under different nutrient-limited conditions in natural ecosystems. However, N addition significantly weakened the relationships between N and P concentrations in green leaves but slightly affected the relationship in senesced leaves, which were mainly modulated by the effects of N addition on nutrient resorption efficiency, especially NRE. These results highlight that nutrient-limited conditions determine the response of nutrient resorption to N deposition and emphasize the effect of nutrient resorption regulation on the coupling of N and P responses to N enrichment. The findings are important for understanding plant nutrient use strategies and the mechanisms underlying the stoichiometric coupling of N and P in response to climate change, and can be used in global biogeochemical models.
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DOI：
10.1136/bmj.b2535
发表时间：
2009-07-21
期刊：
BMJ (Clinical research ed.)
影响因子：
--
作者：
Moher D;Liberati A;Tetzlaff J;Altman DG;PRISMA Group
通讯作者：
PRISMA Group
影响因子：
16.6
作者：
Zhiyou Yuan;Han Y. H. Chen;Han Y. H. Chen;P. B. Reich;P. B. Reich
通讯作者：
Zhiyou Yuan;Han Y. H. Chen;Han Y. H. Chen;P. B. Reich;P. B. Reich
影响因子：
5.5
作者：
Mayor, Jordan R.;Joseph Wright, S.;Turner, Benjamin L.
通讯作者：
Turner, Benjamin L.
影响因子：
2.7
作者：
M. Wang;Meaghan T. Murphy;T. Moore
通讯作者：
M. Wang;Meaghan T. Murphy;T. Moore
影响因子：
8.8
作者：
Harpole, W. Stanley;Ngai, Jacqueline T.;Smith, Jennifer E.
通讯作者：
Smith, Jennifer E.