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231223s2008 xx |||||o 00| ||eng c |
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|a 10.1111/j.1469-8137.2008.02412.x
|2 doi
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|a pubmed24n0594.xml
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|a (NLM)18346109
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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 Gay, Alan
|e verfasserin
|4 aut
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|a Nondestructive analysis of senescence in mesophyll cells by spectral resolution of protein synthesis-dependent pigment metabolism
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|c 2008
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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
|b cr
|2 rdacarrier
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|a Date Completed 07.11.2008
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|a Date Revised 16.04.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a * Over 6 d of dark-induced senescence, leaf segments of wild-type Lolium temulentum lost > 96% chlorophyll a + b; leaves from plants containing a staygreen mutation introgressed from Festuca pratensis, which has a lesion in the senescence-associated fragmentation of pigment-proteolipid complexes, retained over 43% of total chlorophyll over the same period. * Mutant segments preferentially retained thylakoid membrane proteins (exemplified by LHCP II) but lost other cellular proteins at the same rate as wild-type tissue. The protein synthesis inhibitor D-MDMP inhibited chlorophyll degradation and partially prevented protein loss in both genotypes, but tissues treated with the ineffective L-stereoisomer were indistinguishable from water controls. * Principal-components analysis of leaf reflectance spectra distinguished between genotypes, time points and D-MDMP treatments, showing the disruption of pigment metabolism during senescence brought about by the staygreen mutation, by inhibition of protein synthesis and by combinations of the two factors. * The build-up of oxidized, dephytylated and phaeo-derivatives of chl a during senescence of staygreen tissue was prevented by D-MDMP and associated with characteristic difference spectra when senescent mutant tissue was compared with wild-type or inhibitor-treated samples. The suitability of senescence as a subject for systems biology approaches is discussed
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Pigments, Biological
|2 NLM
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|a Plant Proteins
|2 NLM
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|a Propionates
|2 NLM
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|a Chlorophyll
|2 NLM
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|a 1406-65-1
|2 NLM
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|a 2-(4-methyl-2,6-dinitroanilino)-N-methylpropionamide
|2 NLM
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|a 25272-41-7
|2 NLM
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|a chlorophyll b
|2 NLM
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| 650 |
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|a 5712ZB110R
|2 NLM
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| 650 |
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|a Chlorophyll A
|2 NLM
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| 650 |
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|a YF5Q9EJC8Y
|2 NLM
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| 700 |
1 |
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|a Thomas, Howard
|e verfasserin
|4 aut
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|a Roca, María
|e verfasserin
|4 aut
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|a James, Caron
|e verfasserin
|4 aut
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|a Taylor, Janet
|e verfasserin
|4 aut
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|a Rowland, Jem
|e verfasserin
|4 aut
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|a Ougham, Helen
|e verfasserin
|4 aut
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|i Enthalten in
|t The New phytologist
|d 1979
|g 179(2008), 3 vom: 14., Seite 663-674
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:179
|g year:2008
|g number:3
|g day:14
|g pages:663-674
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|u http://dx.doi.org/10.1111/j.1469-8137.2008.02412.x
|3 Volltext
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