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|a 10.1111/j.1469-8137.2007.02246.x
|2 doi
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|a eng
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|a Bathellier, Camille
|e verfasserin
|4 aut
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|a Divergence in delta(13)C of dark respired CO(2) and bulk organic matter occurs during the transition between heterotrophy and autotrophy in Phaseolus vulgaris plants
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|c 2008
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 29.02.2008
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|a Date Revised 16.04.2021
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|a published: Print-Electronic
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|a CommentIn: New Phytol. 2008;177(2):285-7. - PMID 18181955
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|a Citation Status MEDLINE
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|a Substantial evidence has been published in recent years demonstrating that postphotosynthetic fractionations occur in plants, leading to (13)C-enrichment in heterotrophic (as compared with autotrophic) organs. However, less is known about the mechanism responsible for changes in these responses during plant development. The isotopic signature of both organic matter and respired CO(2) for different organs of French bean (Phaseolus vulgaris) was investigated during early ontogeny, in order to identify the developmental stage at which isotopic changes occur. Isotopic analyses of metabolites and mass balance calculations helped to constrain the metabolic processes involved. At the plant scale, apparent respiratory fractionation was constantly positive in the heterotrophic phase (c. 1 per thousand) and turned negative with autotrophy acquisition (down to -3.08 per thousand). Initially very close to that of the dry seed (-26.83 +/- 0.69 per thousand), isotopic signatures of organic matter and respired CO(2) diverged (in opposite directions) in leaves and roots after onset of photosynthesis. Respired CO(2) reached values up to -20 per thousand in leaves and became (13)C-depleted down to -29 per thousand in roots. It was concluded that isotopic differences between organs occurred subsequent to metabolic changes in the seedling during the transition from heterotrophy to autotrophy. They were especially related to respiration and respiratory fractionation
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|a Journal Article
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|a Carbon Isotopes
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|a Badeck, Franz-W
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|a Couzi, Philippe
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|a Harscoët, Sébastien
|e verfasserin
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|a Mauve, Caroline
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|a Ghashghaie, Jaleh
|e verfasserin
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|i Enthalten in
|t The New phytologist
|d 1979
|g 177(2008), 2 vom: 15., Seite 406-418
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