J Integr Plant Biol. ›› 2011, Vol. 53 ›› Issue (5): 375-387.DOI: 10.1111/j.1744-7909.2011.01037.x

Special Issue: Abiotic Stresses

• Plant-environmental Interactions • Previous Articles     Next Articles

Overexpression of SGR Results in Oxidative Stress and Lesion-mimic Cell Death in Rice Seedlings

Huawu Jiang, Yaping Chen, Meiru Li, Xinglan Xu and Guojiang Wu*   

  1. Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, 510650, Guangzhou, China
  • Received:2010-11-08 Accepted:2011-02-16 Published:2011-03-07
  • About author:*Corresponding author. Tel: +86 20 3725 2703; E-mail: wugj@scbg.ac.cn

Abstract:

It is thought that the Stay Green Rice (SGR) gene is involved in the disaggregation of the light harvesting complex and in the subsequent breakdown of chlorophyll and apo-protein during senescence. In this study, we found that overexpression of SGR (Ov-SGR) resulted in the generation of singlet oxygen and other reactive oxygen species and produced a chlorophyll-dependent regional cell death phenotype on leaves of rice seedlings. Transcriptome analyses using Affymetrix Rice GeneChips revealed that Ov-SGR rice seedlings exhibited a number of signs of singlet oxygen response. The genes and their associated biochemical pathways identified provide an insight into how rice plants respond to singlet oxygen at the molecular and physiologic level.

Jiang H, Chen Y, Li M, Xu X, Wu G (2011) Overexpression of SGR results in oxidative stress and lesion-mimic cell death in rice seedlings. J. Integr. Plant Biol. 53(5), 375–387.

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