กลไกการเป็นปฏิปักษ์และการประยุกต์ใช้เชื้อ Streptomyces griseus subsp. formicus เพื่อควบคุมโรครากขาวของยางพารา

Abstract

White root rot of rubber is one of the most important diseases affecting this crop worldwide. This work presents the evaluation of the capacity of Streptomyces griseus subsp. formicus to protect rubber plants against Rigidoporus microporus. Effects of S. griseus subsp. formicus on morphology of plant pathogenic fungi R. microporus RIG 56 was observed by scanning electron microscopy. The micrographs of mycelia treated with S. griseus subsp. formicus illustrated aberrant surface morphology folding with the formation of short branches and undifferentiated tips. Secondary metabolite production by S. griseus subsp. formicus may inhibit the ergosterol biosynthesis pathway. In greenhouse experiments, application of S. griseus subsp. formicus significantly reduced the incidence of white root rot fungal disease compared with untreated controls. Introducing antagonistic bacteria represent an alternative or complementary strategy for the control of this disease.