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Phytoalexin induction in plants of tropical environment

1986; Elsevier BV; Volume: 14; Issue: 5 Linguagem: Inglês

10.1016/0305-1978(86)90010-4

1873-2925

Márcia R. Braga, Maria Cláudia Marx Young, J.Valter A. Ponte, Sonia M.C. Dietrich, Vicente de Paulo Emerenciano, Otto R. Gottlieb,

Plant Stress Responses and Tolerance

Abstract Phytoalexin induction, so far reported mainly for cultivated plants, is applied to wild species of tropical environment. The phenomenon is strongly influenced by the experimental techniques. Application of the more common drop diffusate procedure results in the predominance of positive phytoalexin responses in cultivated (rather than in wild) species, while the facilitated diffusion procedure leads to comparable results for cultivated and wild species. Positive phytoalexin responses by both procedures are more common in the rainy (spring and summer) than in the dry (autumn and winter) season.