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The NAC Transcription Factor SlNAP2 Regulates Leaf Senescence and Fruit Yield in Tomato
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SYSNO ASEP 0492765 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The NAC Transcription Factor SlNAP2 Regulates Leaf Senescence and Fruit Yield in Tomato Author(s) Ma, X. (CN)
Zhang, Y. (CN)
Turečková, Veronika (UEB-Q) RID, ORCID
Xue, G.P. (DE)
Fernie, A. R. (DE)
Mueller-Roeber, B. (DE)
Balazadeh, S. (DE)Number of authors 7 Source Title Plant Physiology. - : Oxford University Press - ISSN 0032-0889
Roč. 177, č. 3 (2018), s. 1286-1302Number of pages 17 s. Language eng - English Country US - United States Keywords abscisic-acid ; arabidopsis-thaliana ; chlorophyll degradation ; aba biosynthesis ; oryza-sativa ; rice leaves ; genes ; expression ; metabolism ; protein Subject RIV EB - Genetics ; Molecular Biology OECD category Biochemistry and molecular biology Institutional support UEB-Q - RVO:61389030 UT WOS 000438735500034 EID SCOPUS 85050214770 DOI 10.1104/pp.18.00292 Annotation Leaf senescence is an essential physiological process in plants that supports the recycling of nitrogen and other nutrients to support the growth of developing organs, including young leaves, seeds, and fruits. Thus, the regulation of senescence is crucial for evolutionary success in wild populations and for increasing yield in crops. Here, we describe the influence of a NAC transcription factor, SlNAP2 (Solanum lycopersicum NAC-like, activated by Apetala3/Pistillata), that controls both leaf senescence and fruit yield in tomato (S. lycopersicum). SlNAP2 expression increases during age-dependent and dark-induced leaf senescence. We demonstrate that SlNAP2 activates SlSAG113 (S. lycopersicum SENESCENCE-ASSOCIATED GENE113), a homolog of Arabidopsis (Arabidopsis thaliana) SAG113, chlorophyll degradation genes such as SlSGR1 (S. lycopersicum senescence-inducible chloroplast stay-green protein 1) and SlPAO (S. lycopersicum pheide a oxygenase), and other downstream targets by directly binding to their promoters, thereby promoting leaf senescence. Furthermore, SlNAP2 directly controls the expression of genes important for abscisic acid (ABA) biosynthesis, S. lycopersicum 9-cis-epoxycarotenoid dioxygenase 1 (SlNCED1), transport, S. lycopersicum ABC transporter G family member 40 (SlABCG40), and degradation, S. lycopersicum ABA 8'-hydroxylase (SlCYP707A2), indicating that SlNAP2 has a complex role in establishing ABA homeostasis during leaf senescence. Inhibiting SlNAP2 expression in transgenic tomato plants impedes leaf senescence but enhances fruit yield and sugar content likely due to prolonged leaf photosynthesis in aging tomato plants. Our data indicate that SlNAP2 has a central role in controlling leaf senescence and fruit yield in tomato. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2019
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