Plant virus metagenomics: what we know and why we need to know more
نویسندگان
چکیده
INTRODUCTION In the past decade the concept of plant viruses as strictly disease-causing entities has been challenged. While the most wellstudied and obvious interactions between plants and viruses are related to disease, there are several examples of mutualistic relationships between plants and viruses, both indirect and direct. These mutualistic interactions have not been fully explored, and many questions remain unanswered. One problem is the lack of knowledge of plant viruses in nature. Metagenomic surveys have estimated that only a small fraction of virus species are known. Additionally, globalization has led to the increased movement of plant material and virus movement. As viruses move from one area to another, new potential hosts offer the possibility of new interactions, both negative and positive.
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