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@ARTICLE{Sack:151783,
author = {Sack, L. and Scoffoni, Ch. and John, G. P. and Poorter,
Hendrik and Mason, C. M. and Mendez-Alonzo, R. and Donovan,
L. A.},
title = {{L}eaf mass per area is independent of vein length per
area: avoiding pitfalls when modelling phenotypic
integration (reply to {B}londer et al. 2014)},
journal = {The journal of experimental botany},
volume = {65},
number = {18},
issn = {0022-0957},
address = {Oxford},
publisher = {Univ. Press},
reportid = {FZJ-2014-01665},
pages = {5115-5123},
year = {2014},
abstract = {It has been recently proposed that leaf vein length per
area ( VLA ) is the major determinant of leaf mass per area
( LMA ), and would thereby determine other traits of the
leaf economic spectrum (LES), such as photosynthetic rate
per mass (A mass), nitrogen concentration per mass (N mass)
and leaf lifespan (LL). In a previous paper we argued that
this ‘vein origin’ hypothesis was supported only by a
mathematical model with predestined outcomes, and that we
found no support for the ‘vein origin’ hypothesis in our
analyses of compiled data. In contrast to the ‘vein
origin’ hypothesis, empirical evidence indicated that VLA
and LMA are independent mechanistically, and VLA (among
other vein traits) contributes to a higher photosynthetic
rate per area (A area), which scales up to driving a higher
A mass, all independently of LMA, N mass and LL. In their
reply to our paper, Blonder et al. (2014) raised questions
about our analysis of their model, but did not address our
main point, that the data did not support their hypothesis.
In this paper we provide further analysis of an extended
data set, which again robustly demonstrates the mechanistic
independence of LMA from VLA, and thus does not support the
‘vein origin’ hypothesis. We also address the four
specific points raised by Blonder et al. (2014) regarding
our analyses. We additionally show how this debate provides
critical guidance for improved modelling of LES traits and
other networks of phenotypic traits that determine plant
performance under contrasting environments.},
cin = {IBG-2},
ddc = {580},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {89582 - Plant Science (POF2-89582)},
pid = {G:(DE-HGF)POF2-89582},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000343182800002},
pubmed = {pmid:25118296},
doi = {10.1093/jxb/eru305},
url = {https://juser.fz-juelich.de/record/151783},
}