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Overexpression of lipid transfer protein (LTP) genes enhances resistance to plant pathogens and LTP functions in long-distance systemic signaling in tobacco

Authors
Sarowar, SujonKim, Young JinKim, Ki DeokHwang, Byung KookOk, Sung HanShin, Jeong Sheop
Issue Date
Mar-2009
Publisher
SPRINGER
Keywords
Lipid transfer protein; Transgenic plant; Virus-induced gene silencing; Disease resistance; Phytophthora nicotianae; Pseudomonas syringae pv. tabaci
Citation
PLANT CELL REPORTS, v.28, no.3, pp 419 - 427
Pages
9
Indexed
SCIE
SCOPUS
Journal Title
PLANT CELL REPORTS
Volume
28
Number
3
Start Page
419
End Page
427
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/120469
DOI
10.1007/s00299-008-0653-3
ISSN
0721-7714
1432-203X
Abstract
The lipid signal is essential for the activation of plant defense responses, but downstream components of the signaling pathway are still poorly defined. To investigate the biological functions of pepper lipid transfer protein (LTP), we carried out virus-induced gene silencing (VIGS) in pepper, constitutive expression of CALTPs and grafting experiments in the tobacco plant. Suppression of endogenous CALTPI and CALTPII by VIGS, respectively, resulted in enhanced susceptibility to Xanthomonas campestris pv. vescatoria and pepper mosaic mottle virus in pepper. On the other hand, the constitutive expression of CALTPI and CALTPII genes in tobacco plants showed enhanced resistance to oomycete pathogen, Phytophthora nicotianae and bacterial pathogen, Pseudomonas syringae pv. tabaci. Enhanced resistance is found to be associated with the enhanced CALTP transcript levels in the independent transgenic CALTPI or II tobacco lines. Induced resistance responses in grafted scion leaves revealed that LTP plays a role in long-distance systemic signaling in plants.
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