文献类型：期刊文献

英文题名：Evidence of elemental homeostasis in fine root and leaf tissues of saplings across a fertility gradient in tropical montane forest in Hainan, China

作者：Hogan, J. Aaron[1] Valverde-Barrantes, Oscar J.[1] Tang, Wenguang[2] Ding, Qiong[3] Xu, Han[4] Baraloto, Christopher[1]

第一作者：Hogan, J. Aaron

通信作者：Hogan, JA[1]

机构：[1]Florida Int Univ, Dept Biol Sci, Inst Environm, Miami, FL 33199 USA;[2]Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England;[3]Hainan Univ, Coll Hort & Landscape Architecture, Haikou 570228, Hainan, Peoples R China;[4]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China

年份：2021

卷号：460

期号：1-2

起止页码：625-646

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-85099857704);WOS:【SCI-EXPANDED(收录号:WOS:000610479000006)】；

基金：We are grateful for the constructive comments of Rich Norby and two anonymous reviewers whose comments improved this work. We thank Michael Breithaupt and the personnel at the Soil Testing and Plant Analysis Laboratory at Louisiana State University. We also thank Liyuan Chen at the China Xinhua Agricultural Technical Development Limited Company. We acknowledge Shaojun Ling, Yaxin Xie, Jaming Wang, Siqi Yang, ShitaingMa, Qiqi Zhang, and Jiazhu Shi for assistance in the field. JAH received support for this work from CTFS-ForestGEO at the Smithsonian. Additionally, we are grateful for many small personal donations that helped fund the soil analyses (www.experiment.com/chinaroots).

语种：英文

外文关键词：Plant nutrient analysis; Leaf chemistry; Root chemistry; Stoichiometry; Tropical forest; Jianfengling; Responsible Editor; Philip John White

摘要：Aims For plants, elemental nutrients are important belowground resources that sustain growth and survival. To understand how tropical plant nutrient status responds to environmental variation, we asked whether concentrations of nutrients in root and leaf tissues track gradients in soil nutrient concentrations and if tissue nutrient concentrations respond independently or in concert to soil nutrient concentrations. Methods We measured soil nutrient concentrations of rhizosphere soil and root and leaf tissue elemental concentrations of saplings from 14 Angiosperm families in montane tropical forest of Jianfengling, China. Using mixed-effects models, we modeled the nutrient concentration of plant tissues as a function of soil resources. Results Of fourteen elements measured, seven -nitrogen, boron, phosphorus, potassium, manganese, copper and zinc- increased in concentrations in root and leaf tissues with higher soil nutrient availability; two decreased -aluminum and carbon; three were invariant -magnesium, sulfur, and calcium; and two -sodium and iron- showed contrasting patterns between leaves and roots. Eight elements necessary to leaf physiological function, but also used in root functioning -nitrogen, boron, magnesium phosphorus, sulfur, potassium, calcium, manganese- were more concentrated in leaves than roots. Additionally, most elements showed tradeoffs in concentrations between roots and leaves. Plant lineage (i.e. family) explained very little of the variation about this overall trend. Conclusions Overall, increases in tissue nutrient concentrations with soil fertility were subtle if present at all. Thus, we conclude that tissue nutrients of juvenile tropical trees have a high degree of elemental homeostasis with local-scale soil nutrient content in Jianfengling.