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231224s2017 xx |||||o 00| ||eng c |
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|a 10.1111/nph.14207
|2 doi
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|a pubmed24n0882.xml
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|a (DE-627)NLM264612604
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|a (NLM)27659765
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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 Cecchetti, Valentina
|e verfasserin
|4 aut
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|a An auxin maximum in the middle layer controls stamen development and pollen maturation in Arabidopsis
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|c 2017
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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 21.02.2018
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|a Date Revised 08.04.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2016 The Authors. New Phytologist © 2016 New Phytologist Trust.
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|a Here, we investigated the role of auxin distribution in controlling Arabidopsis thaliana late stamen development. We analysed auxin distribution in anthers by monitoring DR5 activity: at different flower developmental stages; inhibiting auxin transport; in the rpk2-3 and ems1 mutants devoid of middle layer (ML) or tapetum, respectively; and in the auxin biosynthesis yuc6 and perception afb1-3 mutants. We ran a phenotypic, DR5::GUS and gene expression analysis of yuc6rpk2 and afb1rpk2 double mutants, and of 1-N-naphthylphthalamic acid (NPA)-treated flower buds. We show that an auxin maximum, caused by transport from the tapetum, is established in the ML at the inception of late stamen development. rpk2-3 mutant stamens lacking the ML have an altered auxin distribution with excessive accumulation in adjacent tissues, causing non-functional pollen grains, indehiscent anthers and reduced filament length; the expression of genes controlling stamen development is also altered in rpk2-3 as well as in NPA-treated flower buds. By decreasing auxin biosynthesis or perception in the rpk2-3 background, we eliminated these developmental and gene expression anomalies. We propose that the auxin maximum in the ML plays a key role in late stamen development, as it ensures correct and coordinated pollen maturation, anther dehiscence and filament elongation
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|a Journal Article
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|a Arabidopsis thaliana
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|a anther dehiscence
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|a auxin maximum
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|a auxin transport
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|a filament elongation
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| 650 |
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|a middle layer
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|a pollen maturation
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|a stamen-specific genes
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|a Arabidopsis Proteins
|2 NLM
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|a Indoleacetic Acids
|2 NLM
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| 650 |
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|a RNA, Messenger
|2 NLM
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| 650 |
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|a Transcription Factors
|2 NLM
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| 700 |
1 |
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|a Celebrin, Daniela
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Napoli, Nadia
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ghelli, Roberta
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Brunetti, Patrizia
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Costantino, Paolo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cardarelli, Maura
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 213(2017), 3 vom: 22. Feb., Seite 1194-1207
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:213
|g year:2017
|g number:3
|g day:22
|g month:02
|g pages:1194-1207
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|u http://dx.doi.org/10.1111/nph.14207
|3 Volltext
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|e 3
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|h 1194-1207
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