2011年5月
Allocation of foliar phosphorus fractions and leaf traits of tropical tree species in response to decreased soil phosphorus availability on Mount Kinabalu, Borneo
Journal of Ecology
- ,
- 巻
- 99
- 号
- 3
- 開始ページ
- 849
- 終了ページ
- 857
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1111/j.1365-2745.2011.01805.x
- 出版者・発行元
- WILEY-BLACKWELL
Foliar phosphorus (P) concentration is the sum of the concentrations of P fractions in cells, such as inorganic P and various P-containing biochemical compounds (e.g. nucleic acids, lipids and sugar phosphates). Plants generally reduce foliar P concentration and enhance P-use efficiency in response to low soil P availability. However, how plants allocate P among foliar P fractions to reduce foliar P concentration remains unclear. We investigated foliar P fractions and leaf traits of 21 tropical tree species along a soil P availability gradient across three tropical montane rain forests on Mount Kinabalu, Borneo. We chemically and sequentially fractionated foliar P into the following four fractions: structural P (i.e. phospholipids), metabolic P (collectively including Pi, ATP and sugar phosphates), nucleic acid P and residual P (phosphoproteins and unidentified residue). With decreasing soil P availability, foliar P concentration decreased and leaf mass per area (LMA) increased. The reduction in foliar P concentration strongly correlated with the reduction in the concentrations of both metabolic P and nucleic acid P. Although increased LMA implies an increased allocation to structural tissues, there was no trade-off in P allocation between metabolic P and structural P with increasing LMA. This suggests that tropical tree species on P-poor soils increase the toughness of leaves (i.e. prolonged leaf life span) and also maintain high photosynthetic P-use efficiency (PPUE) without increasing the cost of P for structural tissues. Phosphorus resorption efficiency increased with decreasing soil P availability. The amount of P resorbed before leaf abscission on P-poor soils exceeded that of metabolic P. This suggests that tropical tree species achieve the high P resorption efficiency by withdrawing immobile fractions (i.e. nucleic acid P and structural P) in addition to metabolic P. Synthesis. We conclude that tree species on P-poor soils reduce the demand for foliar P by reducing concentrations of both metabolic P and nucleic acid P, which may potentially limit growth and productivity. However, these tree species can maintain high whole-plant P-use efficiency, because such responses in foliar P fractions do not decrease PPUE, leaf life span and P resorption efficiency. © 2011 The Authors. Journal of Ecology © 2011 British Ecological Society.
- リンク情報
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- DOI
- https://doi.org/10.1111/j.1365-2745.2011.01805.x
- J-GLOBAL
- https://jglobal.jst.go.jp/detail?JGLOBAL_ID=201202267187602770
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000289626000021&DestApp=WOS_CPL
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79954555448&origin=inward 本文へのリンクあり
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79954555448&origin=inward
- ID情報
-
- DOI : 10.1111/j.1365-2745.2011.01805.x
- ISSN : 0022-0477
- eISSN : 1365-2745
- J-Global ID : 201202267187602770
- SCOPUS ID : 79954555448
- Web of Science ID : WOS:000289626000021