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Regulation of the major vacuolar Ca(2+) transporter genes, by intercellular Ca(2+) concentration and abiotic stresses, in tip-burn resistant Brassica oleracea.
MedLine Citation:
PMID:  23138186     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Calcium is an essential plant macronutrient that has unique structural and signaling roles related to tip-burn disorder in Brassica spp. crops. For two types of cabbage inbred lines, tip-burn susceptible and resistant, we measured and compared major macronutrient cations, including Ca(2+), in leaves. In both lines, Ca(2+), Mg(2+), Na(+), and K(+), accumulated more in leaf base than in leaf apex. Ca(2+) and K(+) were >2 times more abundant in the tip-burn resistant line, while Na(+) was higher in the susceptible line. Ca(2+) differences between the two lines resulted from differential accumulation of calcium into cell vacuoles. We profiled major vacuolar Ca(2+) transporters, in both cabbage lines, by growth time and intercellular Ca(2+) concentration. Expression pattern of several Ca(2+) transporter genes differed between tip-burn susceptible and resistant lines by growth time points. We also identified promoter regions of the major Ca(2+) vacuole transporter genes, CAX1, ACA4, and ACA11, which displayed hormonal, light and defense-related cis-acting regulatory elements. Finally, transporter genes in the two cabbage lines responded differently to abiotic stresses, demonstrating diversity in gene regulation among orthologous genes.
Authors:
Jeongyeo Lee; Inkyu Park; Zee-Won Lee; Suk Weon Kim; Namkwon Baek; Hong-Seok Park; Sang Un Park; Seokyoon Kwon; Hyeran Kim
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-9
Journal Detail:
Title:  Molecular biology reports     Volume:  -     ISSN:  1573-4978     ISO Abbreviation:  Mol. Biol. Rep.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0403234     Medline TA:  Mol Biol Rep     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Green Bio Research Center, Cabbage Genomics Assisted Breeding Supporting Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Gwahangno 111, Daejeon, 305-806, South Korea.
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