Salt Stress Affects the Redox Status of Arabidopsis Root Meristems.

ABSTRACT: We report the redox status (profiles) for specific populations of cells that comprise the Arabidopsis root tip. For recently germinated, 3-5-day-old seedlings we show that the region of the root tip with the most reduced redox status includes the root cap initials, the quiescent center and the most distal portion of the proximal meristem, and coincides with (overlays) the region of the auxin maximum. As one moves basally, further into the proximal meristem, and depending on the growth conditions, the redox status becomes more oxidized, with a 5-10 mV difference in redox potential between the two borders delimiting the proximal meristem. At the point on the root axis at which cells of the proximal meristem cease division and enter the transition zone, the redox potential levels off, and rem

SUBMITTER: Jiang K 

PROVIDER: S-EPMC4744855 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature