Hsp70 and Hsp90 expression in citrus and pepper plants in response to Xanthomonas axonopodis pv. citri

BETIANA S. GARAVAGLIA; CECILIA GAROFALO; ELENA G. ORELLANO; JORGELINA OTTADO

European Journal of Plant Pathology

Springer Netherlands

Año: 2009 vol. 123 p. 91 - 97

0929-1873

Hsp70 and Hsp90 expression in response to high and low temperatures was studied in orange, the host plant of Xanthomonas axonopodis pv. citri and in a non-host resistant plant, pepper. As expected in both plants, the expression of these chaperones was induced at high temperatures while at cold temperatures the response was chaperone and plant dependent. Expression of Hsp70 and Hsp90 was analyzed during citrus canker and no changes in their levels could be observed whereas pepper plants infiltrated with the phytopathogen showed an increase in the levels of both chaperones. These results suggest that no changes in Hsp70 and Hsp90 expression are necessary during the disease while they are increased in non-host resistance.