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|a 10.1111/j.1469-8137.2011.03847.x
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|a eng
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|a Vico, Giulia
|e verfasserin
|4 aut
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|a Effects of stomatal delays on the economics of leaf gas exchange under intermittent light regimes
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|c 2011
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|a Text
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|a ƒaComputermedien
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|a Date Completed 10.02.2012
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.
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|a • Understory plants are subjected to highly intermittent light availability and their leaf gas exchanges are mediated by delayed responses of stomata and leaf biochemistry to light fluctuations. In this article, the patterns in stomatal delays across biomes and plant functional types were studied and their effects on leaf carbon gains and water losses were quantified. • A database of more than 60 published datasets on stomatal responses to light fluctuations was assembled. To interpret these experimental observations, a leaf gas exchange model was developed and coupled to a novel formulation of stomatal movement energetics. The model was used to test whether stomatal delays optimize light capture for photosynthesis, whilst limiting transpiration and carbon costs for stomatal movement. • The data analysis showed that stomatal opening and closing delays occurred over a limited range of values and were strongly correlated. Plant functional type and climate were the most important drivers of stomatal delays, with faster responses in graminoids and species from dry climates. • Although perfectly tracking stomata would maximize photosynthesis and minimize transpiration at the expense of large opening costs, the observed combinations of opening and closure times appeared to be consistent with a near-optimal balance of carbon gain, water loss and movement costs
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Gases
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|a Carbon
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|a 7440-44-0
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|a Manzoni, Stefano
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|a Palmroth, Sari
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|a Katul, Gabriel
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|i Enthalten in
|t The New phytologist
|d 1990
|g 192(2011), 3 vom: 01. Nov., Seite 640-52
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|x 1469-8137
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|g volume:192
|g year:2011
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|g day:01
|g month:11
|g pages:640-52
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