An alternative splicing variant of PtRD26 delays leaf senescence by regulating multiple NAC transcription factors in Populus.

ABSTRACT: During leaf senescence, the final stage of leaf development, nutrients are recycled from leaves to other organs, and therefore proper control of senescence is thus critical for plant fitness. Although substantial progress has been achieved in understanding leaf senescence in annual plants, the molecular factors that control leaf senescence in perennial woody plants are largely unknown. Using RNA sequencing, we obtained a high-resolution temporal profile of gene expression during autumn leaf senescence in poplar (Populus tomentosa). Identification of hub transcription factors (TFs) by co-expression network analysis of genes revealed that senescence-associated NAC family TFs (Sen-NAC TFs) regulate autumn leaf senescence. Age-dependent alternative splicing (AS) caused an intron retention (IR)

SUBMITTER: Wang HL 

PROVIDER: S-EPMC8254505 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature