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Control of cambium initiation and activity in Arabidopsis by the transcriptional regulator AHL15
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SYSNO ASEP 0561529 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Control of cambium initiation and activity in Arabidopsis by the transcriptional regulator AHL15 Author(s) Rahimi, A. (IR)
Karami, O. (NL)
Lestari, A. D. (NL)
de Werk, T. (NL)
Amakorová, Petra (UEB-Q) ORCID
Shi, D. (CN)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Greb, T. (DE)
Offringa, R. (NL)Number of authors 9 Source Title Current Biology. - : Cell Press - ISSN 0960-9822
Roč. 32, č. 8 (2022), s. 1764-1775Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords ahl15 ; Arabidopsis ; cytokinin ; ful ; secondary growth ; secondary xylem ; soc1 ; tdif-pxy-wox ; vascular cambium ; woody OECD category Biochemistry and molecular biology R&D Projects EF16_019/0000827 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UEB-Q - RVO:61389030 UT WOS 000800107000008 EID SCOPUS 85129779066 DOI 10.1016/j.cub.2022.02.060 Annotation Plant secondary growth, which is the basis of wood formation, includes the production of secondary xylem, which is derived from meristematic cambium cells embedded in vascular tissue. Here, we identified an important role for the Arabidopsis thaliana (Arabidopsis) AT-HOOK MOTIF CONTAINING NUCLEAR LOCALIZED 15 (AHL15) transcriptional regulator in controlling vascular cambium activity. The limited secondary xylem development in inflorescence stems of herbaceous Arabidopsis plants was significantly reduced in ahl15 loss-of-function mutants, whereas constitutive or vascular meristem-specific AHL15 overexpression produced woody inflorescence stems. AHL15 was required for enhanced secondary xylem formation in the woody suppressor of overexpression of constans 1 (soc1) fruitfull (ful) double loss-of-function mutant. Moreover, we found that AHL15 induces vascular cambium activity downstream of the repressing SOC1 and FUL transcription factors, most likely similar to how it enhances lateral branching by promoting biosynthesis of the hormone cytokinin. Our results uncover a novel pathway driving cambium development, in which AHL15 expression levels act in parallel to and are dependent on the well-established TDIF-PXY-WOX pathway to differentiate between herbaceous and woody stem growth. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2023 Electronic address https://doi.org/10.1016/j.cub.2022.02.060
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