Heat-tolerant basmati rice engineered by over-expression of hsp101

Katiyar-Agarwal, Surekha ; Agarwal, Manu ; Grover, Anil (2003) Heat-tolerant basmati rice engineered by over-expression of hsp101 Plant Molecular Biology, 51 (5). pp. 677-686. ISSN 0167-4412

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Official URL: http://www.springerlink.com/content/h042rn70158100...

Related URL: http://dx.doi.org/10.1023/A:1022561926676


Rice is sensitive to high-temperature stress at almost all the stages of its growth and development. Considering the crucial role of heat shock protein 101 (Hsp101) in imparting thermotolerance to cells, we introduced Arabidopsis thaliana hsp101 (Athsp101) cDNA into the Pusa basmati 1 cultivar of rice (Oryza sativa L.) by Agrobacterium-mediated transformation. Stable integration and expression of the transgene into the rice genome was demonstrated by Southern, northern and western blot analyses. There appeared no adverse effect of over-expression of the transgene on overall growth and development of transformants. The genetic analysis of tested T1 lines showed that the transgene segregated in a Mendelian fashion. We compared the survival of T2 transgenic lines after exposure to different levels of high-temperature stress with the untransformed control plants. The transgenic rice lines showed significantly better growth performance in the recovery phase following the stress. This thermotolerance advantage appeared to be solely due to over-expression of Hsp101 as neither the expression of low-molecular-weight heat shock proteins (HSPs) nor of other members of Clp family proteins was altered in the transgenic rice. The production of high temperature tolerant transgenic rice cultivars would provide a stability advantage under supra-optimal temperature regime thereby improving its overall performance.

Item Type:Article
Source:Copyright of this article belongs to Springer-Verlag.
Keywords:Heat Shock; Thermotolerance; Transgenic Rice
ID Code:15694
Deposited On:13 Nov 2010 12:42
Last Modified:15 Feb 2011 06:43

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