Biological differences and unilateral cross-protection between biotypes of Cowpea aphid-borne mosaic virus

Abstract

-P a s s i on f r u i t ( Passiflora edulis) and cowpea (Vigna unguiculata) are two agricultural crops of considerable economic importance in Northeastern Brazil. Fruit woodiness caused by isolates of Cowpea aphid-borne mosaic virus biotype P (CABMV-P) is the most important virus disease that occurs on passion fruit in Brazil and the biotype cowpea (CABMV-C) is responsible for the most common and important virus disease of cowpea in Northeastern Brazil. The objective of the present research was to determine the biological relationships between isolates of biotype CABMV-C obtained from cowpea (CABMV-CFor and CABMV-CBv) and isolates of biotype CABMV-P obtained from passion fruit (CABMV-PMild and CABMV-PSevere) in common hosts. In host range studies involving 25 plant species only Canavalia ensiformis and Macroptilium lathyroides were shown to be common systemic hosts for all virus isolates. Cross protection studies were developed between CABMV-PMild and CABMV-PSevere in passion fruit and between CABMV-PSevere and CABMV-CFor in C. ensiformis. Unilateral cross protection was detected between CABMVPSevere and CABMV-CFor in C. ensiformis, but CABMV-PMild did not cross protect passion fruit against CABMVPSevere.

Characterization of Cucurbit Aphid-Borne Yellows Virus (CABYV) from Passion Fruit in Brazil: Evidence of a Complex of Species within CABYV Isolates

“…Both viruses have a wide range of host plants and can infect cultivated and non-cultivated plants of diverse plant families. CABMV can infect plants of the families Passifloraceae, Fabaceae, Cucurbitaceae, Solanaceae, Chenopodiaceae, Amaranthaceae, and Poaceae [ 50 , 51 , 52 , 53 ]. CABYV has a wide range of Cucurbitacea plants as hosts and can infect several other plant families, such as Brassicaceae, Asteraceae, Malvaceae, Fabaceae, Amaranthaceae, Chenopodiaceae, Papaveraceae, Lamiaceae, Portulacaceae, Solanaceae, and Passifloraceae [ 16 , 17 , 20 , 27 , 32 , 54 , 55 , 56 , 57 , 58 ].…”

Identification of potential hosts plants of Cowpea aphid‐borne mosaic virus

“…According to Maia et al. (2017), plants belonging to the family Fabaceae , such as Canavalia ensiformis , Macroptilium lathyroides and Vigna unguiculata , are systemically infected by the strains CABMV‐CBv and CABMV‐CFort obtained from cowpea, which manifests in the form of severe symptoms, whereas CABMV‐PSevere and CABMV‐PMild obtained from passion fruit do not infect cowpea.…”

Cross-protectie in de strijd tegen plantenvirussen : Een literatuurstudie naar de mogelijkheden en beperkingen van cross-protectie door milde isolaten van plantenvirussen

“…10. Cross-protectie is afhankelijk van de combinatie van waardplant (ook verschillen in rassen / cultivars) en virus (Maia et al, 2017;Pechinger et al, 2019) en lokale teeltomstandigheden.…”