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Journal of Proteomics 2009-Dec

Changes of defense proteins in the extracellular proteome of grapevine (Vitis vinifera cv. Gamay) cell cultures in response to elicitors.

Samo registrirani uporabniki lahko prevajajo članke
Prijava / prijava
Povezava se shrani v odložišče
M J Martinez-Esteso
S Sellés-Marchart
J C Vera-Urbina
M A Pedreño
R Bru-Martinez

Ključne besede

Povzetek

In plant cells, elicitors induce defense responses that resemble those triggered by pathogen attack, such as the synthesis of phytoalexins and pathogen-related proteins which accumulate in the extracellular space. In the search for the particular proteins involved in defense responses, we investigated the changes in the extracellular proteome of a grapevine (Vitis vinifera cv. Gamay) cell suspension in response to elicitation with methylated cyclodextrins (MBCD) and methyl jasmonate (MeJA). Twenty-five of the 39 spots differentially expressed in 2-D gels were identified and found to be encoded by 10 different genes: three secretory peroxidases, chitinase-III, beta-1,3-glucanase, thaumatin-like, SGNH plant lipase-like, NtPR27-like, xyloglucan endotransglycosylase and subtilisin-like protease. Most of them belong to the pathogenesis-related type proteins. A new class III secretory basic peroxidase and chitinase III were strongly induced in cultures treated with MBCD alone or combined with MeJA, while cultures treated with MeJA alone displayed a general repression of most of the extracellular proteins. Some of the proteins induced in grapevine cell cultures by MBCD are induced in other species by activators of systemic acquired resistance (SAR), a form of plant immunity. Collectively, the results suggest that treatment with MBCD resembles the effect of SAR induction agents in cell cultures.

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