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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erv193
|2 doi
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|a pubmed24n0829.xml
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|a (NLM)25954047
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Peraudeau, Sébastien
|e verfasserin
|4 aut
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| 245 |
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|a Effect of carbohydrates and night temperature on night respiration in rice
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|c 2015
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 28.03.2016
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|a Date Revised 20.06.2015
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
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|a Global warming causes night temperature (NT) to increase faster than day temperature in the tropics. According to crop growth models, respiration incurs a loss of 40-60% of photosynthate. The thermal sensitivity of night respiration (R(n)) will thus reduce biomass. Instantaneous and acclimated effects of NT on R(n) of leaves and seedlings of two rice cultivars having a variable level of carbohydrates, induced by exposure to different light intensity on the previous day, were investigated. Experiments were conducted in a greenhouse and growth chambers, with R(n) measured on the youngest fully expanded leaves or whole seedlings. Dry weight-based R(n) was 2.6-fold greater for seedlings than for leaves. Leaf R(n) was linearly related to starch (positive intercept) and soluble sugar concentration (zero intercept). Increased NT caused higher R(n) at a given carbohydrate concentration. The change of R(n) at NT increasing from 21 °C to 31 °C was 2.4-fold for the instantaneous response but 1.2- to 1.7-fold after acclimation. The maintenance component of R(n) (R(m)'), estimated by assimilate starvation, averaged 28% in seedlings and 34% in leaves, with no significant thermal effect on this ratio. The acclimated effect of increased NT on R(m)' across experiments was 1.5-fold for a 10 °C increase in NT. No cultivar differences were observed in R(n) or R(m)' responses. The results suggest that the commonly used Q10=2 rule overestimates thermal response of respiration, and R(n) largely depends on assimilate resources
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Acclimation
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|a Oryza sativa L.
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|a Q10
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|a maintenance and growth respiration
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|a shading
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|a soluble sugars
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|a starch.
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|a Carbohydrates
|2 NLM
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|a Gases
|2 NLM
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|a Starch
|2 NLM
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|a 9005-25-8
|2 NLM
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|a Lafarge, Tanguy
|e verfasserin
|4 aut
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|a Roques, Sandrine
|e verfasserin
|4 aut
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|a Quiñones, Cherryl O
|e verfasserin
|4 aut
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|a Clement-Vidal, Anne
|e verfasserin
|4 aut
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|a Ouwerkerk, Pieter B F
|e verfasserin
|4 aut
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|a Van Rie, Jeroen
|e verfasserin
|4 aut
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|a Fabre, Denis
|e verfasserin
|4 aut
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|a Jagadish, Krishna S V
|e verfasserin
|4 aut
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|a Dingkuhn, Michael
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 66(2015), 13 vom: 01. Juli, Seite 3931-44
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:66
|g year:2015
|g number:13
|g day:01
|g month:07
|g pages:3931-44
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|u http://dx.doi.org/10.1093/jxb/erv193
|3 Volltext
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