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The effect of light irradiation on Sekiguchi lesion formation induced by infection with Bipolaris oryzae on rice sl mutants was investigated. Although the Sekiguchi lesions formed exclusively under daylight fluorescent lamps, brown spots and necrotic spot lesions formed in the dark. The Sekiguchi lesions were larger than the brown spot lesions. When leaf blades inoculated with B. oryzae were irradiated through band-pass filters of BPB-45, BPB-50, BPB-55, and BPB-60, Sekiguchi lesions were formed regardless of the BPB filters' wavelengths. Under black-light lamps, near-infrared fluorescent lamps, or in the dark, however, brown spot lesions were induced by B. oryzae. The effective wavelength region for light-dependent Sekiguchi lesion formation was 400–700 nm. Furthermore, there was a direct correlation between the length of the radiation wavelengths and the size of the Sekiguchi lesions. [ABSTRACT FROM AUTHOR]

The significance of light irradiation in Sekiguchi lesion (SL) formation by infection with Magnaporthe grisea on rice cv. Sekiguchi-asahi was investigated. When the leaf blades of cv. Sekiguchi-asahi inoculated with M. grisea spores were kept under different wavelengths of light, SLs were formed under visible light regardless of the compatibility between fungal race and cv. Sekiguchi-asahi. On the contrary, typical blast and/or nectrotic spot lesions were formed under near ultraviolet radiation from the black light fluorescent lamps and near infrared radiation from infrared fluorescent lamps. The effective wave-length for light-dependent SL formation was 400-700 nm. Furthermore, the longer the wavelength of radiation. the bigger were the SLs. Such light-dependent induction of the SL was suppressed by pretreatment of 3-(3,4-di-chlorophenyl)- 1,1 -dimethylurea (DCMU) and cycloheximide (CY). These results suggested that photosynthetic and protein synthetic activities were involved in SL formation. [ABSTRACT FROM AUTHOR]

Presents the results of the genetic analysis of a patient with cerebrotendinous xanthomatosis (CTX). Manifestations of CTX; Analysis of chemical enzymes and genetic mutations associated with the disorder.