EFFECT OF LIGHT AND WHEAT VARIETY ON THE GROWTH AND SPORULATION OF WHEAT BLAST PATHOGEN MAGNAPORTHE ORYZAE TRITICUM

Abstract

ABSTRACT

The effects of the visible light namely white, NUV, blue including dark condition was evaluated on seed germination, mycelial radial growth, and conidia production of wheat blast pathogen Magnaporthe oryzae triticum (MoT) on three wheat varieties namely BARI Gom-26, BARI Gom-28 and Prodip. The seed germination, number of conidia per seed, number of conidia per panicle of this plant pathogenic fungus was significantly differed among these light treatments. MoT produced significantly more conidia when the fungus grew under White, NUV and Blue lights. MoT produced more conidia on BARI Gom-26 and BARI Gom-28 compared to Prodip variety. Blue light produced a greater number of conidia per rachis and per panicle where white light enhanced to produce a greater number of conidia per seed. BARI Gom-28 variety produced a greater number of conidia on rachis, seed and panicle. Whether the number of conidia counted on rachis, seed and panicle are less produced on Prodip variety. Blue×BARI Gom-28 and Dark×BARI Gom-28 resulted highest seed germination, whether the number of conidia per rachis and per panicle was higher only in the interaction effect of blue light and BARI Gom-28 variety. No significant difference of conidia production per seed was obtained in the interaction effect of White×BARI Gom-26, White×BARI Gom-28 and Blue×BARI Gom-28. The number of conidia per rachis and per panicle was comparatively lower in dark light and Prodip variety, where the number of conidia per seed was lower for both interaction effect of NUV×Prodip and Dark×Prodip treatment combination. MoT was grown on oat meal agar medium (OMA) in the White, NUV, Blue light and Dark condition. Radial mycelial growth was significantly higher under Blue light and comparatively lower in White light condition.