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Immunohistochemical analysis of cell wall hydroxyproline-rich glycoproteins in the roots of resistant and susceptible wax gourd cultivars in response to Fusarium oxysporum f. sp Benincasae infection and fusaric acid treatment

文献类型: 外文期刊

作者: Xie, Dasen 2 ; Ma, Li 1 ; Samaj, Jozef 3 ; Xu, Chunxiang 1 ;

作者机构: 1.S China Agr Univ, Coll Hort, Guangzhou 510642, Guangdong, Peoples R China

2.Guangdong Acad Agr Sci, Inst Vegetable Res, Guangzhou 510640, Guangdong, Peoples R China

3.Palacky Univ, Ctr Reg Hana Biotechnol & Agr Res, Fac Sci, Olomouc 78371, Czech Republic

关键词: HRGPs;Monoclonal antibodies;Immunolabelling;Plant-pathogen interaction

期刊名称:PLANT CELL REPORTS ( 影响因子:4.57; 五年影响因子:4.463 )

ISSN: 0721-7714

年卷期: 2011 年 30 卷 8 期

页码:

收录情况: SCI

摘要: Hydroxyproline-rich glycoproteins (HRGPs) play a defensive role in host-pathogen interactions. However, specific roles of individual HRGPs in plant defense against pathogen are poorly understood. Changes in extracellular distribution and abundance of individual cell wall HRGPs were investigated on root sections of two wax gourd (Benincasa hispida Cogn.) cultivars (Fusarium wilt resistant and susceptible, respectively), which were analyzed by immunolabelling with 20 monoclonal antibodies recognizing different epitopes of extensins and arabinogalactan proteins (AGPs) after being inoculated with Fusarium oxysporum f. sp. Benincasae or treated with fusaric acid (FA). These analyses revealed the following: (1) The levels of JIM11 and JIM20 interacting extensins were higher in the resistant cultivar. Either treatment caused a dramatic decrease in signal in both cultivars, but some new signal appeared in the rhizodermis. (2) The AGPs or rhamnogalacturonan containing CCRCM7-epitope were enhanced in the resistant cultivar, but not in the susceptible one by either treatment. (3) Either treatment caused a slight increase in the levels of the AGPs recognized by LM2 and JIM16, but there were no differences between two cultivars. (4) The MAC204 signal nearly disappeared after FA treatment, but this was not the case with pathogen attack. (5) The LM14 signal slightly decreased after both treatments in both cultivars, but a less decrease was observed with the resistant cultivar. These results indicate that the CCRCM7 epitope likely contributed to the resistance of wax gourd to this pathogen, and JIM11 and JIM20 interacting extensins as well as LM2, LM14, MAC204 and JIM16 interacting AGPs were involved in the host-pathogen interaction.

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