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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erw150
|2 doi
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|a pubmed24n0864.xml
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|e rakwb
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|a eng
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|a Khoshravesh, Roxana
|e verfasserin
|4 aut
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| 245 |
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|a C3-C4 intermediacy in grasses
|b organelle enrichment and distribution, glycine decarboxylase expression, and the rise of C2 photosynthesis
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|c 2016
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 01.09.2017
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|a Date Revised 13.11.2018
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a Photorespiratory glycine shuttling and decarboxylation in bundle sheath (BS) cells exhibited by C2 species is proposed to be the evolutionary bridge to C4 photosynthesis in eudicots. To evaluate this in grasses, we compare anatomy, cellular localization of glycine decarboxylase (GDC), and photosynthetic physiology of a suspected C2 grass, Homolepis aturensis, with these traits in known C2 grasses, Neurachne minor and Steinchisma hians, and C3 S laxum that is sister to S hians We also use publicly available genome and RNA-sequencing data to examine the evolution of GDC subunits and enhance our understanding of the evolution of BS-specific GDC expression in C2 and C4 grasses. Our results confirm the identity of H aturensis as a C2 species; GDC is confined predominantly to the organelle-enriched BS cells in H aturensis and S hians and to mestome sheath cells of N minor Phylogenetic analyses and data obtained from immunodetection of the P-subunit of GDC are consistent with the hypothesis that the BS dominant levels of GDC in C2 and C4 species are due to changes in expression of a single GLDP gene in M and BS cells. All BS mitochondria and peroxisomes and most chloroplasts in H aturensis and S hians are situated centripetally in a pattern identical to C2 eudicots. In S laxum, which has C3-like gas exchange patterns, mitochondria and peroxisomes are positioned centripetally as they are in S hians This subcellular phenotype, also present in eudicots, is posited to initiate a facilitation cascade leading to C2 and C4 photosynthesis
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Arthropogoninae
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|a C2 Kranz anatomy
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|a C2 photosynthesis
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|a Homolepis.
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|a bundle sheath
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|a glycine decarboxylase
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|a grasses
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|a mitochondria
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|a Glycine Dehydrogenase (Decarboxylating)
|2 NLM
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|a EC 1.4.4.2
|2 NLM
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|a Ribulose-Bisphosphate Carboxylase
|2 NLM
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|a EC 4.1.1.39
|2 NLM
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1 |
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|a Stinson, Corey R
|e verfasserin
|4 aut
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|a Stata, Matt
|e verfasserin
|4 aut
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|a Busch, Florian A
|e verfasserin
|4 aut
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|a Sage, Rowan F
|e verfasserin
|4 aut
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|a Ludwig, Martha
|e verfasserin
|4 aut
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|a Sage, Tammy L
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 67(2016), 10 vom: 07. Mai, Seite 3065-78
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:67
|g year:2016
|g number:10
|g day:07
|g month:05
|g pages:3065-78
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|u http://dx.doi.org/10.1093/jxb/erw150
|3 Volltext
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