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The Effect of HMC-Toxin to the Structure and Function of Mitochondria in Maize with CMS and Normal Cytoplasm

Author: HaoLiMei
Tutor: WeiJianKun；WangLiAn
School: Hebei Normal
Course: Botany
Keywords: Cytoplasmic Male Sterility Bipolaris maydis race C toxin Mitochondria Structure Function Transmission electron microscopy Oxygen electrode
CLC: S432.4
Type: Master's thesis
Year: 2002
Downloads: 80
Quote: 5
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Abstract


In this study, electron microscopy technique to observe C toxin dealing with a normal nuclear cytoplasmic (N) and C- sterile cytoplasm (C) maize leaf mitochondria , the results show that , C toxin treated C cytoplasm corn leaves the outer mitochondrial membrane integrity, within membrane damage , crest severely damaged, and some even see crest . While the same nucleus N cytoplasm corn leaves the outer mitochondrial membrane integrity , endometrial only by minor damage. C toxin treatment without the same nucleus N, C cytoplasm corn leaves both inner and outer mitochondrial membrane integrity, crest is obvious. C with oxygen electrode method for the determination of the toxin on the same nucleus N, C cytoplasm maize leaf mitochondrial respiration rate , results showed that the toxin plus C , C cytoplasm corn leaves decreased mitochondrial respiration rate is equal to or greater than 20% , the value of respiratory depression the difference is equal to or greater than 0.22 ; N cytoplasm corn leaves and mitochondrial respiration rate decreased equal to or less than 5% , the value of respiratory depression is equal to or less than 0.06 . As can be seen from the above results , C toxin C cytoplasm maize mitochondrial structure and function of having a special role, and C toxin loci may be on the inner mitochondrial membrane , but this hypothesis has yet to be at the molecular level further study.

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CLC: > Agricultural Sciences > Plant Protection > Pest and Disease Control > Plant diseases and their prevention > Transgression ( pass ) an infectious agent harmful
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