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@ARTICLE{Muller:154633,
author = {Muller, Onno and Stewart, Jared J. and Cohu, Christopher M.
and Polutchko, Stephanie K. and Demmig-Adams, Barbara and
Adams, William W.},
title = {{L}eaf architectural, vascular and photosynthetic
acclimation to temperature in two biennials},
journal = {Physiologia plantarum},
volume = {152},
number = {4},
issn = {0031-9317},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2014-03923},
pages = {763–772},
year = {2014},
abstract = {Acclimation of leaf features to growth temperature was
investigated in two biennials (whose life cycle spans summer
and winter seasons) using different mechanisms of sugar
loading into exporting conduits, Verbascum phoeniceum
(employs sugar-synthesizing enzymes driving symplastic
loading through plasmodesmatal wall pores of phloem cells)
and Malva neglecta (likely apoplastic loader transporting
sugar via membrane transport proteins of phloem cells). In
both species, acclimation to lower temperature involved
greater maximal photosynthesis rates and vein density per
leaf area in close correlation with modification of minor
vein cellular features. While the symplastically loading
biennial exhibited adjustments in the size of minor leaf
vein cells (consistent with adjustment of the level of
sugar-synthesizing enzymes), the putative apoplastic
biennial exhibited adjustments in the number of cells
(consistent with adjustment of cell membrane area for
transporter placement). This upregulation of morphological
and anatomical features at lower growth temperature likely
contributes to the success of both the species during the
winter. Furthermore, while acclimation to low temperature
involved greater leaf mass per area in both species, this
resulted from greater leaf thickness in V. phoeniceum vs a
greater number of mesophyll cells per leaf area in M.
neglecta. Both types of adjustments presumably accommodate
more chloroplasts per leaf area contributing to
photosynthesis. Both biennials exhibited high foliar vein
densities (particularly the solar-tracking M. neglecta),
which should aid both sugar export from and delivery of
water to the leaves.},
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:000345503100013},
doi = {10.1111/ppl.12226},
url = {https://juser.fz-juelich.de/record/154633},
}