Abstract

SANDHU, Sardul Singh et al. Lipoxygenase activity in Brazilian rice cultivars with variable resistance to leaf blast disease. Bragantia [online]. 2007, vol.66, n.1, pp. 27-30. ISSN 0006-8705.  http://dx.doi.org/10.1590/S0006-87052007000100004.

Eight rice lines viz. CNA 8983, IAC-1732, IAC-1733, IAC-1748, IAC-1736, IAC-201, Volano and Arborea were evaluated in greenhouse for resistance against the leaf blast disease caused by Magnoparthe gracea. Lines CNA 8983, IAC 1732, IAC 1733 and IAC 1748 showed satisfactory resistance against the blast fungus while IAC 1736 and IAC 201 were intermediate and Volano and Arborea susceptible. All lines did not have lipoxygenase activity increased by methyljasmonic acid, however enzyme activity showed a positive relationship with resistance.

Keywords : blast resistance; Magnoparthe gracea; methyljasmonic acid; Oryza sativa.