Unable to connect to database - 02:45:05 Unable to connect to database - 02:45:05 SQL Statement is null or not a SELECT - 02:45:05 SQL Statement is null or not a DELETE - 02:45:05 Botany & Plant Biology 2007 - Abstract Search
Unable to connect to database - 02:45:06 Unable to connect to database - 02:45:06 SQL Statement is null or not a SELECT - 02:45:06

Abstract Detail

Hormone Biology

Bai, Ling [2], Zhou, Yun [2], Zhang, Xiaoran [2], Cao, Mingqing [1], Song, Chun-Peng [2].

Hydrogen Peroxide Modulates Abscisic Acid Signaling in Root Growth and Development in Arabidopsis.

Exogenous abscisic acid (ABA) can inhibit root growth and promote formation of more root hairs in the root tip of Arabidopsis. However, the molecular mechanisms that underlie root ABA signaling are largely unknown. We report here that hydrogen peroxide (H2O2) reduces the root growth of wild type, and the phenotype of H2O2 on the root growth is similar to ABA response. Meanwhile ABA-induced the changes in the morphology of root system can be partly reversed by ascorbic acid in wild type and abolished in NADPH oxidase defective mutant atrbohF and atrbohC. Further, ABA can induce H2O2 accumulation in the root cells and enhance transcription level of OXI1, which is necessary for many more AOS-dependent processes such as root hair growth in Arabidopsis. Our results suggest that H2O2 as an important signal molecule is required for the ABA-regulated root growth and development in Arabidopsis.

Log in to add this item to your schedule

1 - Beijing Agro-Biotechnology Research Center
2 - Henan University, Department of Biology, Minglun ST 80, Kaifeng, Henan Province, 475001, P R China

root growth

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P35023
Abstract ID:419

Copyright 2000-2007, Botanical Society of America. All rights