Plant Mol Biol (2017) 93:533–546 DOI 10.1007/s11103-016-0580-6 Opposite roles of the Arabidopsis cytokinin receptors AHK2 and AHK3 in the expression of plastid genes and genes for the plastid transcriptional machinery during senescence 1 1 1 Maria N. Danilova · Natalia V. Kudryakova · Anastasia S. Doroshenko · 1 1 2 Dmitry A. Zabrodin · Zulfira F. Rakhmankulova · Ralf Oelmüller · Victor V. Kusnetsov Received: 8 July 2016 / Accepted: 14 December 2016 / Published online: 1 February 2017 © Springer Science+Business Media Dordrecht 2017 Abstract Keywords Arabidopsis · Chloroplast gene expression · Key message Cytokinin membrane receptors of the Cytokinin receptors · Senescence · Transcription Arabidopsis thaliana AHK2 and AHK3 play oppo‑ site roles in the expression of plastid genes and genes for the plastid transcriptional machinery during leaf Introduction senescence Abstract Loss-of-function mutants of Arabidopsis thali- Leaf senescence is a highly regulated part of the plant life ana were used to study the role of cytokinin receptors in cycle. It involves the sequential activation or inhibition of the expression of chloroplast genes during leaf senescence. genes for the remobilization of nutrients from senescing Accumulation of transcripts of several plastid-encoded cells to young leaves, developing seeds or storage proteins genes is dependent on the АНК2/АНК3 receptor combina- (Gregersen and Holm 2007; Woo et al. 2013). Over the last tion. АНК2 is particularly important at the
Plant Molecular Biology – Springer Journals
Published: Feb 1, 2017
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