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Title 

Enhanced drought tolerance of transgenic rice plants expressing a pea manganese superoxide dismutase

Authors 

F Z WangQ B WangSuk Yoon KwonSang Soo KwakW A Su

Publisher 

Elsevier

Issue Date 

2005

Citation 

Journal of Plant Physiology, vol. 162, no. 4, pp. 465-472

Keywords 

droughtoryza sativaoxidative stresssuperoxide dismutasetransgeneantioxidantsdrought-tolerant rice plantsleaf slicesmanganese superoxide dismutase (MnSOD)transgenic plant

Abstract 

We investigated the role that manganese superoxide dismutase (MnSOD), an important antioxidant enzyme, may play in the drought tolerance of rice. MnSOD from pea (Pisum sativum) under the control of an oxidative stress-inducible SWPA2 promoter was introduced into chloroplasts of rice (Oryza sativa) by Agrobacterium-mediated transformation to develop drought-tolerant rice plants. Functional expression of the pea MnSOD in transgenic rice plants (T1) was revealed under drought stress induced by polyethylene glycol (PEG) 6000. After PEG treatment the transgenic leaf slices showed reduced electrolyte leakage compared to wild type (WT) leaf slices, whether they were exposed to methyl viologen (MV) or not, suggesting that transgenic plants were more resistant to MV- or PEG-induced oxidative stress. Transgenic plants also exhibited less injury, measured by net photosynthetic rate, when treated with PEG. Our data suggest that SOD is a critical component of the ROS scavenging system in plant chloroplasts and that the expression of MnSOD can improve drought tolerance in rice.

ISSN 

0176-1617

Link 

http://dx.doi.org/10.1016/j.jplph.2004.09.009

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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