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Molecular Breeding

, Volume 17, Issue 2, pp 159–171 | Cite as

Transgenic indica Rice Expressing ns-LTP-Like Protein Shows Enhanced Resistance to Both Fungal and Bacterial Pathogens

  • Rajesh Narhari Patkar
  • Bharat Bhushan Chattoo
Article

Abstract

Antimicrobial peptides (AMPs) from plant seeds, known to inhibit pathogen growth have a great potential in developing transgenic plants resistant to disease. Some of the nonspecific-lipid transfer proteins (ns-LTP) that facilitate in vitro transport of lipids, show antimicrobial activity in vitro. Rice seeds also contain ns-LTPs; however, these genes are expressed weakly in seedlings. We have transformed Pusa Basmati 1, an elite indica rice cultivar, with the gene for Ace-AMP1 from Allium cepa, coding for an effective antimicrobial protein homologous to ns-LTPs. The gene for Ace-AMP1 was cloned under an inducible rice phenylalanine ammonia-lyase (PAL) or a constitutive maize ubiquitin (UbI) promoter. Ace-AMP1 was expressed in transgenic lines and secreted in the apoplastic space. Protein extracts from leaves of transgenic plants inhibited three major rice pathogens, Magnaporthe grisea, Rhizoctonia solani and Xanthomonas oryzae, in vitro. Enhanced resistance against these pathogens was observed in in planta assays, and the degree of resistance correlating with the levels of Ace-AMP1 with an average increase in resistance to blast, sheath blight, and bacterial leaf blight disease by 86%, 67%, and 82%, respectively. Importantly, transgenic rice plants, with stable integration and expression of Ace-AMP1, retained their agronomic characteristics while displaying enhanced resistance to both fungal and bacterial pathogens.

Key words

Ace-AMP1 Genetic transformation Magnaporthe grisea Oryza sativa Rhizoctonia solani Xanthomonas oryzae 

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Copyright information

© Springer 2006

Authors and Affiliations

  • Rajesh Narhari Patkar
    • 1
  • Bharat Bhushan Chattoo
    • 1
  1. 1.Department of Microbiology and Biotechnology Centre, Faculty of ScienceM.S. University of BarodaVadodaraIndia

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