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231225s2022 xx |||||o 00| ||eng c |
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|a 10.1016/j.plantsci.2022.111177
|2 doi
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|a pubmed25n1122.xml
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|a (DE-627)NLM33683571X
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|a (NLM)35151443
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|a (PII)S0168-9452(22)00001-2
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Gupta, Prateek
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Phytoene synthase 2 in tomato fruits remains functional and contributes to abscisic acid formation
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 15.02.2022
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|a Date Revised 07.12.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2022 Elsevier B.V. All rights reserved.
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|a In ripening tomato fruits, the leaf-specific carotenoids biosynthesis mediated by phytoene synthase 2 (PSY2) is replaced by a fruit-specific pathway by the expression of two chromoplast-specific genes: phytoene synthase 1 (PSY1) and lycopene-β-cyclase (CYCB). Though both PSY1 and PSY2 genes express in tomato fruits, the functional role of PSY2 is not known. To decipher whether PSY2-mediated carotenogenesis operates in ripening fruits, we blocked the in vivo activity of lycopene-β-cyclases in fruits of several carotenoids and ripening mutants by CPTA (2-(4-Chlorophenylthio)triethylamine hydrochloride), an inhibitor of lycopene-β-cyclases. The CPTA-treatment induced accumulation of lycopene in leaves, immature-green and ripening fruits. Even in psy1 mutants V7 and r that are deficient in fruit-specific carotenoid biosynthesis, CPTA triggered lycopene accumulation but lowered the abscisic acid level. Differing from fruit-specific carotenogenesis, CPTA-treated V7 and r mutant fruits accumulated lycopene but not phytoene and phytofluene. The lack of phytoene and phytofluene accumulation was reminiscent of PSY2-mediated leaf-like carotenogenesis, where phytoene and phytofluene accumulation is never seen. The lycopene accumulation was associated with the partial transformation of chloroplasts to chromoplasts bearing thread-like structures. Our study uncovers the operation of a parallel carotenogenesis pathway mediated by PSY2 that provides precursors for abscisic acid biosynthesis in ripening tomato fruits
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|a Journal Article
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|a Abscisic acid
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|a CPTA
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|a Carotenoid biosynthesis
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|a Chromoplasts
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|a Fruit ripening
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| 650 |
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|a Phytoene synthase
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| 650 |
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|a Tomato
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| 650 |
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7 |
|a Carotenoids
|2 NLM
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| 650 |
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|a 36-88-4
|2 NLM
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| 650 |
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|a Abscisic Acid
|2 NLM
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| 650 |
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7 |
|a 72S9A8J5GW
|2 NLM
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| 650 |
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7 |
|a (all-E) phytoene
|2 NLM
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| 650 |
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|a 87E4NJ6N51
|2 NLM
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| 700 |
1 |
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|a Rodriguez-Franco, Marta
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bodanapu, Reddaiah
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sreelakshmi, Yellamaraju
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sharma, Rameshwar
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Plant science : an international journal of experimental plant biology
|d 1985
|g 316(2022) vom: 01. März, Seite 111177
|w (DE-627)NLM098174193
|x 1873-2259
|7 nnas
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| 773 |
1 |
8 |
|g volume:316
|g year:2022
|g day:01
|g month:03
|g pages:111177
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| 856 |
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|u http://dx.doi.org/10.1016/j.plantsci.2022.111177
|3 Volltext
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