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KMID : 1041219950370010062
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Journal of Sericultural and Entomological Science
1995 Volume.37 No. 1 p.62 ~ p.67
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Studies on the Toxicity of $\delta$-endotoxin of Bacillus thuringiensis to the Several Tissues of Hyphantria cunea Drury
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Jeon Hyang-Mi
Cho Ja-Hyang
Kang Suk-Kwon
Seo Sook-Jae
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Abstract
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Ultrastructural changes of tissues caused by Bacillus thuringiensis var. kurstaki $\delta$-endotoxin intoxication of Hyphantria cunea were observed by transmission electron microscopy. Bt $\delta$-endotoxin crystals induced the disruption of microvilli, vacuolation of cytoplasm, changes in the cisternae of the endoplasmic reticulum, disappearance of basal striations, loss of ribosomes, and changes in the configurations of mitochondria in the columnar cell of midgut. The fat body cells also showed spherical endoplasmic reticulum and distorted mitochondria, and then the cells were destroyed.
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KEYWORD
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Bacillus thuringiensis var, KURSTAKI, $\delta$-endotoxin, hyphantria cunea, midgut, fat body, cell organelle
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