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240128s2024 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erae029
|2 doi
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|a pubmed24n1577.xml
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|a (NLM)38280208
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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 Ali, Akhtar
|e verfasserin
|4 aut
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|a ABA INSENSITIVE 2 promotes flowering by inhibiting OST1/ABI5-dependent FLOWERING LOCUS C transcription in Arabidopsis
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|c 2024
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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 16.04.2024
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|a Date Revised 23.10.2024
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a The plant hormone abscisic acid (ABA) is an important regulator of plant growth and development and plays a crucial role in both biotic and abiotic stress responses. ABA modulates flowering time, but the precise molecular mechanism remains poorly understood. Here we report that ABA INSENSITIVE 2 (ABI2) is the only phosphatase from the ABA-signaling core that positively regulates the transition to flowering in Arabidopsis. Loss-of-function abi2-2 mutant shows significantly delayed flowering both under long day and short day conditions. Expression of floral repressor genes such as FLOWERING LOCUS C (FLC) and CYCLING DOF FACTOR 1 (CDF1) was significantly up-regulated in abi2-2 plants while expression of the flowering promoting genes FLOWERING LOCUS T (FT) and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1) was down-regulated. Through genetic interactions we further found that ost1-3 and abi5-1 mutations are epistatic to abi2-2, as both of them individually rescued the late flowering phenotype of abi2-2. Interestingly, phosphorylation and protein stability of ABA INSENSITIVE 5 (ABI5) were enhanced in abi2-2 plants suggesting that ABI2 dephosphorylates ABI5, thereby reducing protein stability and the capacity to induce FLC expression. Our findings uncovered the unexpected role of ABI2 in promoting flowering by inhibiting ABI5-mediated FLC expression in Arabidopsis
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|a Journal Article
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|a ABA signaling
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|a ABI2
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|a ABI5
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|a FLC
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|a SnRK2
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|a flowering time
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|a ABI5 protein, Arabidopsis
|2 NLM
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|a Abscisic Acid
|2 NLM
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|a 72S9A8J5GW
|2 NLM
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|a Arabidopsis Proteins
|2 NLM
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|a Basic-Leucine Zipper Transcription Factors
|2 NLM
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| 650 |
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|a OST1 protein, Arabidopsis
|2 NLM
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| 650 |
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|a EC 2.7.1.-
|2 NLM
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|a Plant Growth Regulators
|2 NLM
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| 650 |
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|a Protein Kinases
|2 NLM
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|a EC 2.7.-
|2 NLM
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|a ABI2 protein, Arabidopsis
|2 NLM
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| 650 |
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|a EC 3.1.3.-
|2 NLM
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| 700 |
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|a Zareen, Shah
|e verfasserin
|4 aut
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|a Park, Junghoon
|e verfasserin
|4 aut
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|a Khan, Haris Ali
|e verfasserin
|4 aut
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|a Lim, Chae Jin
|e verfasserin
|4 aut
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|a Bader, Zein Eddin
|e verfasserin
|4 aut
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|a Hussain, Shah
|e verfasserin
|4 aut
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|a Chung, Woo Sik
|e verfasserin
|4 aut
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|a Gechev, Tsanko
|e verfasserin
|4 aut
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|a Pardo, Jose M
|e verfasserin
|4 aut
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|a Yun, Dae-Jin
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 75(2024), 8 vom: 15. Apr., Seite 2481-2493
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:75
|g year:2024
|g number:8
|g day:15
|g month:04
|g pages:2481-2493
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|u http://dx.doi.org/10.1093/jxb/erae029
|3 Volltext
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