Gene expression changes occurring at bolting time are associated with leaf senescence in Arabidopsis

Plant Direct
Will E Hinckley, J. A. Brusslan

Abstract

In plants, the vegetative to reproductive phase transition (termed bolting in Arabidopsis) generally precedes age-dependent leaf senescence (LS). Many studies describe a temporal link between bolting time and LS, as plants that bolt early, senesce early, and plants that bolt late, senesce late. The molecular mechanisms underlying this relationship are unknown and are potentially agriculturally important, as they may allow for the development of crops that can overcome early LS caused by stress-related early-phase transition. We hypothesized that leaf gene expression changes occurring in synchrony with bolting were regulating LS. ARABIDOPSIS TRITHORAX (ATX) enzymes are general methyltransferases that regulate the adult vegetative to reproductive phase transition. We generated an atx1, atx3, and atx4 (atx1,3,4) triple T-DNA insertion mutant that displays both early bolting and early LS. This mutant was used in an RNA-seq time-series experiment to identify gene expression changes in rosette leaves that are likely associated with bolting. By comparing the early bolting mutant to vegetative WT plants of the same age, we were able to generate a list of differentially expressed genes (DEGs) that change expression with bolting as the p...Continue Reading

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Citations

Apr 4, 2021·International Journal of Molecular Sciences·Zaira M López-JuárezPlinio Guzmán

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Datasets Mentioned

BETA
GSE134177

Methods Mentioned

BETA
PCR
PCA

Software Mentioned

VirtualPlant
Short Time ‐ Series Expression Miner ( STEM )
Noiseq
Genesect
VirtualPlant1
DILS
R
TAIR
DeSeq2
GENIE3

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