Role of PIN-mediated auxin efflux in apical hook development ofArabidopsis thaliana
0301 basic medicine
PIN3 Apical hook Auxin Arabidopsis functional genomic analysis gene family-members box protein tir1 differential growth root gravitropism plant development cell elongation ethylene transport biosynthesis
Indoleacetic Acids
Arabidopsis Proteins
Recombinant Fusion Proteins
Meristem
Arabidopsis
Gene Expression Regulation, Developmental
Membrane Transport Proteins
Ethylenes
Genes, Plant
Plants, Genetically Modified
Models, Biological
03 medical and health sciences
Gene Expression Regulation, Plant
Seedlings
Mutation
DOI:
10.1242/dev.041277
Publication Date:
2010-01-28T12:57:34Z
AUTHORS (13)
ABSTRACT
The apical hook of dark-grown Arabidopsis seedlings is a simple structure that develops soon after germination to protect the meristem tissues during emergence through the soil and that opens upon exposure to light. Differential growth at the apical hook proceeds in three sequential steps that are regulated by multiple hormones, principally auxin and ethylene. We show that the progress of the apical hook through these developmental phases depends on the dynamic, asymmetric distribution of auxin, which is regulated by auxin efflux carriers of the PIN family. Several PIN proteins exhibited specific, partially overlapping spatial and temporal expression patterns, and their subcellular localization suggested auxin fluxes during hook development. Genetic manipulation of individual PIN activities interfered with different stages of hook development, implying that specific combinations of PIN genes are required for progress of the apical hook through the developmental phases. Furthermore, ethylene might modulate apical hook development by prolonging the formation phase and strongly suppressing the maintenance phase. This ethylene effect is in part mediated by regulation of PIN-dependent auxin efflux and auxin signaling.
SUPPLEMENTAL MATERIAL
Coming soon ....
REFERENCES (61)
CITATIONS (285)
EXTERNAL LINKS
PlumX Metrics
RECOMMENDATIONS
FAIR ASSESSMENT
Coming soon ....
JUPYTER LAB
Coming soon ....