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3 results on '"Palaiyur Nanjappan Sivalingam"'

1. GBF3 transcription factor imparts drought tolerance in Arabidopsis thaliana

Author

Venkategowda Ramegowda, Upinder Singh Gill, Palaiyur Nanjappan Sivalingam, Aarti Gupta, Chirag Gupta, Geetha Govind, Karaba N. Nataraja, Andy Pereira, Makarla Udayakumar, Kirankumar S. Mysore, and Muthappa Senthil-Kumar

Subjects
Medicine, Science
Abstract

Abstract Drought transcriptome analysis of finger millet (Eleusine coracana) by cDNA subtraction identified drought responsive genes that have a potential role in drought tolerance. Through virus-induced gene silencing (VIGS) in a related crop species, maize (Zea mays), several genes, including a G-BOX BINDING FACTOR 3 (GBF3) were identified as candidate drought stress response genes and the role of GBF3 in drought tolerance was studied in Arabidopsis thaliana. Overexpression of both EcGBF3 and AtGBF3 in A. thaliana resulted in improved tolerance to osmotic stress, salinity and drought stress in addition to conferring insensitivity to ABA. Conversely, loss of function of this gene increased the sensitivity of A. thaliana plants to drought stress. EcGBF3 transgenic A. thaliana results also suggest that drought tolerance of sensitive plants can be improved by transferring genes from far related crops like finger millet. Our results demonstrate the role of GBF3 in imparting drought tolerance in A. thaliana and indicate the conserved role of this gene in drought and other abiotic stress tolerance in several plant species.

Published
2017
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3. Cajanus scarabaeoides yellow mosaic virus, a new bipartite begomovirus causing yellow mosaic disease in Cajanus scarabaeoides (L.) Thouars in India

Author

Narasimham Dokka, Ashish Marathe, Bhimeshwari Sahu, Pankaj Kaushal, Probir Kumar Ghosh, and Palaiyur Nanjappan Sivalingam

Subjects
Plant Science, Agronomy and Crop Science
Abstract

Yellow mosaic disease of Cajanus scarabaeoides (L.) Thouars (CsYMD) was observed in up to 46% of C. scarabaeoides plants in the mungbean, urdbean and pigeon pea fields from 22 districts of Chhattisgarh State, India, during 2017-2019. The symptoms were characterized by yellow mosaic on green leaves and yellow discoloration of leaves in advanced stages of the disease. Severely infected plants showed shortened internodal length and reduced leaf size. CsYMD was transmissible to healthy C. scarabaeoides and Cajanus cajan by whitefly (Bemisia tabaci). The plants thus infected developed typical yellow mosaic symptoms on their leaves within 16 and 22 days of inoculation, respectively, suggesting a begomovirus etiology. Molecular analysis revealed that this begomovirus has a bipartite genome composed of DNA-A (2729 nucleotides) and DNA-B (2630 nucleotides). Sequence and phylogenetic analyses revealed that the nucleotide sequence of the DNA-A component had the highest identity of 81.1% with DNA-A of Rhynchosia yellow mosaic virus (RhYMV) (NC_038885) followed by mungbean yellow mosaic virus (MN602427) (75.3%). DNA-B had the highest identity of 74.0% with DNA-B of RhYMV (NC_038886). As per ICTV guidelines, this isolate had

Published
2023

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