Primary Industry Development, Department of Primary Industries and Regional Development, 3 Baron-Hay Court, Kensington, WA, 6151, Australia.
UWA School of Agriculture and Environment, UWA Institute of Agriculture, University of Western Australia, 35 Stirling Hwy, Crawley, WA, 6009, Australia.
Arch Virol. 2023 Jan 3;168(1):20. doi: 10.1007/s00705-022-05664-8.
Soybean dwarf virus (SbDV; family Tombusviridae, genus Luteovirus, species Soybean dwarf virus) can cause damaging disease epidemics in cultivated plants of the family Fabaceae. The biological characteristics of SbDV isolate WA-8, including its vector species, host range, and impact on Australian grain legume cultivars, were investigated in a series of glasshouse experiments. Isolate WA-8 was classified as the YP strain, as it was transmitted by Acyrthosiphon pisum (pea aphid) and Myzus persicae (green peach aphid) and infected known strain indicator species. Of the 18 pasture legume species inoculated with SbDV, 12 were SbDV hosts, including eight that had not been identified previously as hosts. When inoculated with SbDV, field pea (Pisum sativum), faba bean (Vicia faba), lentil (Lens culinaris), and narrow-leafed lupin cv. Jurien were the most susceptible (70 to 100% plant infection rates), and albus lupin (Lupinus albus), chickpea (Cicer arietinum), and narrow-leafed lupin cv. Mandelup were less susceptible (20 to 70%). Over the course of three experiments, chickpea was the most sensitive to infection, with a > 97% reduction in dry above-ground biomass (AGB) and a 100% reduction in seed yield. Field pea cv. Gunyah, faba bean, and lentil were also sensitive, with a 36 to 61% reduction in AGB. Field pea cv. Kaspa was relatively tolerant, with no significant reduction in AGB or seed yield. The information generated under glasshouse conditions in this study provides important clues for understanding SbDV epidemiology and suggests that it has the potential to cause damage to Australian grain legume crops in the field, especially if climate change facilitates its spread.
大豆矮化病毒（SbDV；Tombusviridae 科，Luteovirus 属，大豆矮化病毒种）可引起豆科栽培植物的破坏性疾病流行。在一系列温室实验中，研究了 SbDV 分离物 WA-8 的生物学特性，包括其介体种类、宿主范围以及对澳大利亚粮食豆科作物品种的影响。分离物 WA-8 被归类为 YP 株系，因为它可通过豌豆蚜（Acyrthosiphon pisum）和桃蚜（Myzus persicae）传播，并感染已知的株系指示物种。在接种 SbDV 的 18 种豆科牧草中，有 12 种是 SbDV 的宿主，其中 8 种以前未被鉴定为宿主。当接种 SbDV 时，田野豌豆（Pisum sativum）、蚕豆（Vicia faba）、兵豆（Lens culinaris）和窄叶羽扇豆 cv. Jurien 最易感（70%至 100%的植株感染率），而白羽扇豆（Lupinus albus）、鹰嘴豆（Cicer arietinum）和窄叶羽扇豆 cv. Mandelup 则不太易感（20%至 70%）。在三次实验中，鹰嘴豆对感染最为敏感，地上干生物量（AGB）减少超过 97%，种子产量减少 100%。田野豌豆 cv. Gunyah、蚕豆和兵豆也很敏感，AGB 减少 36%至 61%。田野豌豆 cv. Kaspa 相对耐受，AGB 或种子产量没有明显减少。本研究在温室条件下获得的信息为了解 SbDV 流行病学提供了重要线索，并表明它有可能在田间对澳大利亚粮食豆科作物造成损害，特别是如果气候变化有利于其传播。
