Nitrogen and phosphorus availabilities interact to modulate leaf trait scaling relationships across six plant functional types in a controlled-environment study

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 215(2017), 3 vom: 26. Aug., Seite 992-1008
1. Verfasser:	Crous, Kristine Y (VerfasserIn)
Weitere Verfasser:	O'Sullivan, Odhran S, Zaragoza-Castells, Joana, Bloomfield, Keith J, Negrini, A Clarissa A, Meir, Patrick, Turnbull, Matthew H, Griffin, Kevin L, Atkin, Owen K
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2017
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article day respiration glasshouse leaf economic spectrum nitrogen (N) nutrient supply photosynthesis plant functional groups Sugars Carbon Dioxide mehr... 142M471B3J Phosphorus 27YLU75U4W Starch 9005-25-8 Nitrogen N762921K75

Beschreibung
Zusammenfassung:	© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust. Nitrogen (N) and phosphorus (P) have key roles in leaf metabolism, resulting in a strong coupling of chemical composition traits to metabolic rates in field-based studies. However, in such studies, it is difficult to disentangle the effects of nutrient supply per se on trait-trait relationships. Our study assessed how high and low N (5 mM and 0.4 mM, respectively) and P (1 mM and 2 μM, respectively) supply in 37 species from six plant functional types (PTFs) affected photosynthesis (A) and respiration (R) (in darkness and light) in a controlled environment. Low P supply increased scaling exponents (slopes) of area-based log-log A-N or R-N relationships when N supply was not limiting, whereas there was no P effect under low N supply. By contrast, scaling exponents of A-P and R-P relationships were altered by P and N supply. Neither R : A nor light inhibition of leaf R was affected by nutrient supply. Light inhibition was 26% across nutrient treatments; herbaceous species exhibited a lower degree of light inhibition than woody species. Because N and P supply modulates leaf trait-trait relationships, the next generation of terrestrial biosphere models may need to consider how limitations in N and P availability affect trait-trait relationships when predicting carbon exchange
Beschreibung:	Date Completed 09.04.2018 Date Revised 30.09.2020 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.14591