Journal
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volume 58, Issue -, Pages 54-65Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2012.05.026
Keywords
Proteomics; Salt tolerance; Rootstock-grafting; Watermelon; Bottle gourd
Categories
Funding
- National Basic Research Program of China (973 Program) [2009CB119000]
- Ph.D. Programs Foundation of Ministry of Education of China [20100097110001]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- earmarked foundation for Modern Agroindustry Technology Research System [CARS-25-C-03]
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An insertion grafting technique to do research on salt tolerance was applied using watermelon (Citrullus lanatus [Thunb.] Mansf. cv. Xiuli) as a scion and bottle gourd (Lagenaria siceraria Standl. cv. Chaofeng Kangshengwang) as a rootstock. Rootstock-grafting significantly relieved the inhibition of growth and photosynthesis induced by salt stress in watermelon plants. Proteomic analysis revealed 40 different expressed proteins in response to rootstock-grafting and/or salt stress. These proteins were involved in Calvin cycle, amino acids biosynthesis, carbohydrate and energy metabolism, ROS defense, hormonal biosynthesis and signal transduction. Most of these proteins were up-regulated by rootstock-grafting and/or susceptible to salt stress. The enhancement of the metabolic activities of Calvin cycle, biosynthesis of amino acids, carotenoids and peroxisomes, glycolytic pathway and tricarboxylic acid cycle will probably contribute to intensify the biomass and photosynthetic capacity in rootstock-grafted seedlings under condition without salt. The accumulation of key enzymes included in these biological processes described above seems to play an important role in the enhancement of salt tolerance of rootstock-grafted seedlings. Furthermore, leucine-rich repeat transmembrane protein kinase and phospholipase may be involved in transmitting the internal and external stimuli induced by grafting and/or salt stress. (C) 2012 Elsevier Masson SAS. All rights reserved.
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