Work

Cytokinin-induced root growth involves actin filament reorganization

Year: 2011

Type: article

Abstract: Root architecture is developmentally plastic and affected by many intrinsic factors (e.g. plant hormones) and extrinsic factors (e.g. touch, gravity) in order to maximize nutrient and water acquisition. We have recently shown that asymmetrical exposure of cytokinin (CK) at the root tip causes root growth directional changes that is dependent on ethylene signaling and is potentiated by glucose signaling. Auxin homeostasis as maintained by auxin signaling and transport is also involved in CK-induced root cell elongation and differential growth. The signaling pathways eventually converge at actin filament organization since actin filament organization inhibitor latrunculin B (Lat B) can also induce similar growth. We, show that CK can actually alter actin filament organization as seen in actin binding protein 35S::GFP-ABD2-GFP transgenic lines as is also altered by auxin polar transport inhibitor 1-N-naphthylphthalamic acid (NPA) and Lat B in different manners.

Source: Plant Signaling & Behavior

DOI: 10.4161/psb.6.11.17641

Authors: Sunita Kushwah, Alan M. Jones, Ashverya Laxmi

Institutions: National Institute of Plant Genome Research, University of North Carolina at Chapel Hill

Language: English

Topic: Plant Molecular Biology Research

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: green

Funder: National Institute of General Medical Sciences

Award: Decoding the phosphorylation bar code in Arabidopsis G Biased Signaling