研究领域

Processes and mechanisms controlling flower and pollen development in angiosperms Various factors, and their possible interactions, in plant developmental processes Male sterility in tomatoes

My research is focussed on understanding the processes and mechanisms controlling flower and pollen development in angiosperms. We use floral and male-sterile mutants in tomato, canola (Brassica napus)  and Arabidopsis in our research. By using microscopic, physiological (hormonal and environmental ) and proteomic approaches we investigate the various factors, and their possible interactions, in plant developmental processes. Our research on male sterilty in tomato has application in hybrid seed industry.

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I. S. Sheoran and V.K. Sawhney. 2010. Proteome analysis of the normal and Ogura (ogu) CMS anthers of Brassica napus to identify proteins associated with male sterility. (Invited paper). Botany. 88: 217-230. I.S. Sheoran, E.J. Pedersen, A.R.S. Ross and V.K.Sawhney. 2009. Dynamics of protein expression during pollen germination in canola (Brassica napus). Planta 230: 779-793. I.S. Sheoran, A.R.S. Ross, D. J.H. Olson and V.K. Sawhney. 2009. Differential expression of proteins in the wild type and 7B-1 male-sterile mutant anthers of tomato (Solanum lycopersicum): A proteomic analysis. Journal of Proteomics 71: 624-636. I.S. Sheoran, A.R.S. Ross, D. J.H. Olson and V.K. Sawhney. 2007. Proteomic analysis of tomato (Lycopersicon esculentum) pollen. Journal of Experimental Botany 58: 3525-3535. D.L. Lindsay, V.K. Sawhney and P.C. Bonham-Smith. 2006. Cytokinin-induced changes in CLAVATA1 and WUSCHEL expression temporally coincide with altered floral development in Arabidopsis. Plant Science 170: 1111-1117. I.S. Sheoran, D.J.H. Olson, A.R.S. Ross and V.K. Sawhney. 2005. Proteome analysis of embryo and endosperm from germinating tomato seeds. Proteomics 5: 3752-3764. V.K. Sawhney, 2004. Photoperiod - sensitive male-sterile mutant in tomato and its potential use in hybrid seed production. Journal of Horticultural Science and Biotechnology 79: 138-141. H. Fei, R. Zhang, R.P. Pharis and V.K. Sawhney. 2004. Pleiotropic effects of the male sterile 33 (ms33) mutant in Arabidopsis are associated with modifications in endogenous gibberellins, indole-3-acetic acid and abscisic acid. Planta 219: 649-660. R.K. Kakkar and V.K. Sawhney. 2002. Polyamine research in plants ‑ a changing perspective. Physiologia Plantarum 116:281-292. M. Fellner and V.K. Sawhney. 2002. The 7B‑1 mutant in tomato shows blue light‑specific resistance to osmotic stresses and abscisic acid. Planta 214: 675‑682. H. Fei and V.K. Sawhney. 2001. Ultrastructural characterization of male sterile 33 (ms33) mutant in Arabidopsis affected in pollen desiccation and maturation. Canadian Journal of Botany 79: 118‑129. M. Fellner, R. Zhang, R.P. Pharis and V.K. Sawhney. 2001. Reduced de‑etiolation of hypocotyl growth in a tomato mutant is associated with hypersensitivity to, and high endogenous levels of, abscisic acid. Journal of Experimental Botany 52: 725‑738. M. Fellner and V.K. Sawhney. 2000. Seed germination in a tomato male‑sterile mutant is resistant to osmotic, salt and low temperature stresses. Theoretical and Applied Genetics 102: 215‑222. Book: “Pollen Biotechnology for Crop Production and Improvement”. 1997. K.R.Shivanna and V.K. Sawhney (Editors). Cambridge University Press. U.K.