Abstract
Potyviruses are the largest group of plant infecting RNA viruses that cause significant losses in a wide range of crops across the globe. The majority of viruses in the genus Potyvirus are transmitted by aphids in a non-persistent, non-circulative manner and have been extensively studied vis-à-vis their structure, taxonomy, evolution, diagnosis, transmission, and molecular interactions with hosts. This comprehensive review exclusively discusses potyviruses and their transmission by aphid vectors, specifically in the light of several virus, aphid and plant factors, and how their interplay influences potyviral binding in aphids, aphid behavior and fitness, host plant biochemistry, virus epidemics, and transmission bottlenecks. We present the heatmap of the global distribution of potyvirus species, variation in the potyviral coat protein gene, and top aphid vectors of potyviruses. Lastly, we examine how the fundamental understanding of these multi-partite interactions through multi-omics approaches is already contributing to, and can have future implications for, devising effective and sustainable management strategies against aphid-transmitted potyviruses to global agriculture.
Highlights
A vast majority of plant viruses rely on insect vectors for their plant-to-plant spread
TransmissionTransmission of plant viruses by insect vectors is categorized into four types: non-persistent; semi-persistent; persistent circulative and persistent propagative based on the virus localization in Transmission of plant viruses by insect vectors is categorized into four types: non-persistent; the vector, the time required by the vector for virus acquisition, retention and transmission and semi-persistent; persistent circulative and persistent propagative based on the virus localization in association of virus with various internal organs of the vector [4,12,13,14]
This study demonstrates the dual benefit of using CRISPR/Cas13a system: conferring resistance to RNA plant viruses by targeting any RNA transcript and, most importantly, blocking the aphid transmission of potyviruses by successful knocking down of helper component proteinase (HC-Pro)
Summary
A vast majority of plant viruses rely on insect vectors for their plant-to-plant spread. Aphids are arguably the most successful vectors of plants viruses, including potyviruses, due to an array of generic and specific features they possess [1]. Aphids transmit viruses from several families including Potyviridae, which is the largest plant infecting RNA virus family [6]. Potyvirids, the members of virus family Potyviridae, are single-stranded, positive-sense RNA viruses [7,8]. 2020, 12, non-persistent manner; members of the genera Rymovirus, Poacevirus and Tritimovirus are transmitted by eriophyid mites in a semi-persistent manner; Bymovirus genus members are transmitted by a Potyvirids, the members of virus family. With 176 described species, Potyvirus is the largest and the most extensively studied genus in mites in a semi-persistent manner; Bymovirus genus members are transmitted by a group single-celled. Have ahave cosmopolitan distribution highest number species, Potyvirus is the andChina, the most studied1,genus in Potyviridae family, of species recorded in largest the U.S, andextensively
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