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348 results on '"Gupta, Vidya S."'

31. Pigeonpea

Author

Ratnaparkhe, Milind B., Gupta, Vidya S., and Kole, Chittaranjan, editor

Published
2007
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35. DNA Markers and Heterosis

Author

Ranjekar, Prabhakar K., Davierwala, Armaity P., Gupta, Vidya S., Jain, S. Mohan, editor, Brar, D. S., editor, and Ahloowalia, B. S., editor

Published
2002
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41. Genome-wide identification and characterization of nucleotide binding site leucine-rich repeat genes in linseed reveal distinct patterns of gene structure

Author

Kale, Sandip M., Pardeshi, Varsha C., Barvkar, Vitthal T., Gupta, Vidya S., and Kadoo, Narendra Y.

Subjects
Research, Genetic aspects, Properties, Plant genetics -- Research, Disease resistance (Plants) -- Research, Flaxseeds -- Genetic aspects, NOD-like receptors -- Properties, Flaxseed -- Genetic aspects, Plant immunology -- Research
Abstract

Introduction Plants have developed a repertoire of resistance (R) genes containing various conserved domains. Many such genes conferring resistance to a wide range of pathogens and pests have been identified [...], Plants employ different disease-resistance genes to detect pathogens and to induce defense responses. The largest class of these genes encodes proteins with nucleotide binding site (NBS) and leucine-rich repeat (LRR) domains. To identify the putative NBS-LRR encoding genes from linseed, we analyzed the recently published linseed genome sequence and identified 147 NBS-LRR genes. The NBS domain was used for phylogeny construction and these genes were classified into two well- known families, non-TIR (CNL) and TIR related (TNL), and formed eight clades in the neighbor-joining bootstrap tree. Eight different gene structures were observed among these genes. An unusual domain arrangement was observed in the TNL family members, predominantly in the TNL-5 clade members belonging to class D. About 12% of the genes observed were linseed specific. The study indicated that the linseed genes probably have an ancient origin with few progenitor genes. Quantitative expression analysis of five genes showed inducible expression. The in silico expression evidence was obtained for a few of these genes, and the expression was not correlated with the presence of any particular regulatory element or with unusual domain arrangement in those genes. This study will help in understanding the evolution of these genes, the development of disease resistant varieties, and the mechanism of disease resistance in linseed. Key words: flax, NBS-LRR, in silico gene expression, phylogenetic analysis, promoter analysis, motif analysis. Les plantes font appel a differents genes de resistance pour detecter les pathogenes et pour induire des reactions de defense. La plus grande classe de ces genes code pour des proteines dotees de domaines de liaison a des nucleotides (NBS) et de repetitions riches en leucine (LRR). Afin d'identifier des genes NBS-LRR putatifs chez le lin, les auteurs ont inspecte la sequence genome du lin recemment publiee et ont identifie 147 genes NBS-LRR. Le domaine NBS a ete employe pour produire une phylogenie et ces genes ont ete separes en deux classes bien connues, soit les genes apparentes aux TIR (TNL) ou aux non-TIR (CNL), et ont forme huit clades dans un arbre neighbour joining avec reechantillonage. Huit structures geniques ont ete observees parmi ces genes. Un arrangement inhabituel des domaines a ete observe au sein des membres de la famille TNL, particulierement au sein du clade TNL-5 de la classe D. Environ 12% des genes etaient specifiques au lin. Cette etude indique que les genes du lin ont probablement une origine ancienne avec un faible nombre de genes ancestraux. Une analyse quantitative de l'expression de cinq genes a montre une expression inductible. Des evidences d'expression in silico ont ete obtenues pour quelques-uns de ces genes et cette expression n'etait pas correlee avec la presence d'un quelconque element regulateur ou avec un arrangement inhabituel des domaines chez ces genes. Cette etude aidera a comprendre revolution de ces genes, le developpement de varietes resistantes et le mecanisme de resistance aux maladies chez le lin. [Traduit par la Redaction] Mots-cles: lin, NBS-LRR, expression genique in silico, analyse phylogenetique, analyse du promoteur, analyse des motifs.

Published
2013
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