Abstract
Plants are constantly under the threat of various biotic and abiotic stress conditions and to overcome these stresses, they have evolved multiple mechanisms including systematic accumulation of different phytohormones, phytoalexins and pathogenesis related (PR) proteins. PR proteins are cluster of proteins with low molecular weight which get incited in plants under different stresses. In this paper, in-silico approaches are used to compare the physico-chemical properties of 6 PR proteins (PR1, PR2, PR5, PR9, PR10, PR12) of Arabidopsis thaliana and Oryza sativa. Topological analysis revealed the presence of transmembrane localization of PR2 and absence of transmembrane domain in PR10 of both model plants studied. Amino acid composition shows the dominance of small aliphatic amino acids i.e. alanine, glycine and serine in both plants studied. These results highlights the similarities and differences between PRs of both model plants, which provides clue towards their diversified roles in plants.
Highlights
Ever increasing human population and drastic climate change being observed in recent decades continue to pose serious threat to growth and productivity of agricultural crops
Among all pathogenesis related (PR) of both species; A. thaliana and O. sativa, minimum length was observed in AtPR12 and OsPR12 (80) while maximum length was observed for PR2 (339 in AtPR2 and 334 in OsPR2)
Minimum molecular weight for PRs of both plants was observed for PR12 (8709.22 for AtPR12 and 8784.33 for OsPR12) whereas, maximum molecular weight was observed for PR2 (37338.92) in case of A. thaliana and PR9 (42889.77) for O. sativa
Summary
Ever increasing human population and drastic climate change being observed in recent decades continue to pose serious threat to growth and productivity of agricultural crops. The latter encounter different types of environmental stresses, mainly categorized as biotic or abiotic. During the course of evolution, plants have evolved a broad range of defense mechanisms for survival under various stressful conditions. These mechanisms involve the responses like activation of Reactive Oxygen Species (ROS); accumulation of different phytohormones like abscisic acid (ABA), ethylene (ET), jasmonic acid (JA), methyl jasmonate (MeJA) and salicylic
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