Abstract
In this part, the history of the study on RFS pathogen U. virens was reviewed, including the pathogen naming and the change process, morphological characteristics of U. virens and culture characters both of asexual and sexual stages, and mycelium, chlamydospore, conidiophore and sclerotium germination. Genetic diversity, pathogenicity, the strain-host interaction, host range of U. virens and it’s early detection were also discussed. The research of Ustiloxins of RFS, including biological activity, toxicity to plants and animal, the potential possibility utilization of Ustiloxins, for example use as screening agent for rice varieties resistance to RFS, and anticancer drugs.
Highlights
It possesses great significance for realizing the occurrence, epidemiology, harm and the management of the diseases to study the biological characters and morphological characteristics of the pathogens which caused the diseases
The sporulation ability and pigmentation of U. virens are positively correlated with pathogenicity, and the strain growth rate is negatively correlated with pathogenicity (Wang et al, 2013)
More than 12 months can survive if U. virens was periodically transferred in paraffin oil storage, which was known as suitable method for the storage of U. virens
Summary
It possesses great significance for realizing the occurrence, epidemiology, harm and the management of the diseases to study the biological characters and morphological characteristics of the pathogens which caused the diseases. Rice false smut was first found in 1878 and the caused pathogen was named Ustilago virens. The biological characters and morphological characteristics of U. virens was discussed in this paper. The U. virens has genetic diversity, and the pathogenicity shows obvious difference of different source pathogen. There was strong interaction between the U. virens and the host rice varieties. The abilities of different U. virens producing toxin there are differences. The toxin produced by U. virens shows obvious poison and negative effect on both plants and animals, on the other hand, the toxins of U. virens potentially develop the beneficial preparation products
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