ArticlePlant molecular biology2021
A complex interplay of Gβ and Gγ proteins regulates plant growth and defence traits in the allotetraploid Brassica juncea.
Article in Plant molecular biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 5 citations in OpenAlex.
- A Guide to Culturing, Maintenance, and Leaf Inoculation Methods for Rapid Screening and Quantification of Sclerotinia sclerotiorum Infection in Mustard.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Article
- Genome diploidization associates with cladogenesis, trait disparity, and plastid gene evolution.Plant physiology · 2022Article
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3 authors at 1 institution in 1 country.
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Abstract
key messageGene expression analysis coupled with in-planta studies showed that specific Gβγ combination regulates plant growth and defence traits in the allotetraploid Brassica juncea. Plant heterotrimeric G-proteins regulate a wide range of responses despite their limited repertoire of core components. The roles and functional interactions between different G-protein subunits are quite perplexing, which get further complicated with polyploidy. Here, we show that the allotetraploid Brassica juncea comprises multiple homologs of G-protein genes, encoding six BjuGβ and ten highly divergent BjuGγ subunit proteins, later being classified into type-A1, type-A2 and type-C Gγ proteins. The encoded BjuGβ and BjuGγ proteins shared close evolutionary relationship and have retained distinct spatio-temporal expression patterns during plant developmental stages and in response to the necrotrophic pathogen, Sclerotinia sclerotiorum. RNAi based suppression of BjuGβ and BjuGγ genes suggested functional overlap and selectivity of BjuGβs with three distinct BjuGγ type subunits, to regulate plant height (BjuGβγA2 and BjuGβγC), seed weight (BjuGβGγA1 and BjuGβGγC), silique size (BjuGβGγC) and pathogen response (BjuGβGγA1 and BjuGβGγC). Further, the triplicated BjuGβ genes, formed due to Brassica specific whole-genome-triplication event, showed differential involvement during pathogen response, wherein overexpression of BjuGβ2 displayed higher resistance to Sclerotinia infection. Taken together, our study demonstrates that multiple BjuGβ and BjuGγ proteins have retained distinct spatio-temporal expression and functional selectivity to regulate specific plant growth and defence traits in the oilseed B. juncea.
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