Spatial distribution of transcript changes in the maize primary root elongation zone at low water potential.

ABSTRACT:

Background

Previous work showed that the maize primary root adapts to low Psiw (-1.6 MPa) by maintaining longitudinal expansion in the apical 3 mm (region 1), whereas in the adjacent 4 mm (region 2) longitudinal expansion reaches a maximum in well-watered roots but is progressively inhibited at low Psiw. To identify mechanisms that determine these responses to low Psiw, transcript expression was profiled in these regions of water-stressed and well-watered roots. In addition, comparison between region 2 of water-stressed roots and the zone of growth deceleration in well-watered roots (region 3) distinguished stress-responsive genes in region 2 from those involved in cell maturation.

Results

Responses of gene expression to water stress in regions 1 and 2 were largely distinct.

SUBMITTER: Spollen WG 

PROVIDER: S-EPMC2364623 | biostudies-literature | 2008 Apr

REPOSITORIES: biostudies-literature