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Che H, Gao S, Lin Y, Long H, Li Y, Cai L, Li S, Ma Y. Viromics Reveals Two Novel Viruses of the Family Closteroviridae in Codiaeum variegatum Plant with Leaf Variegation Symptoms. PLANT DISEASE 2025; 109:115-122. [PMID: 39215501 DOI: 10.1094/pdis-05-24-1013-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Codiaeum variegatum is a valuable ornamental plant with distinct bright yellowing and golden spots on dark green leaves, which resemble virus symptoms. To investigate the factors, especially viral agents, associated with the variegated leaf color of C. variegatum, we performed virome profiling of a single C. variegatum 'Gold Dust' leaf sample collected from Hainan, China, using ribosomal RNA-depleted total RNA sequencing on an Illumina NovaSeq 6000 platform. Two novel viruses, with two variants each, belonging to the family Closteroviridae, were detected and characterized: Croton golden spot-associated virus C variants 1 and 2 (CGSaVC-v1 and CGSaVC-v2) of the genus Crinivirus and Croton golden spot-associated virus A variants 1 and 2 (CGSaVA-v1 and CGSaVA-v2) of the genus Ampelovirus. Transmission electron microscopy showed long, flexuous, filamentous virus particles approximately 15 nm in diameter and 760 to 770 nm in length. Molecular screening of 97 variegated individual plant leaves showed a high prevalence of CGSaVA-v2 (90.7%), CGSaVA-v1 (75.3%), CGSaVC-v1 (70.1%), and CGSaVC-v2 (47.4%), while asymptomatic leaves near the meristem tip were mostly free of the target viruses. To our knowledge, this is the first study to demonstrate the significant association between closterovirids and the golden spots. The findings provide novel insights into the genetic diversity of the family Closteroviridae and inform future germplasm conservation and new cultivar development of C. variegatum.
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Affiliation(s)
- Haiyan Che
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan Province, China
| | - Shengfeng Gao
- Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wanning 571533, Hainan Province, China
| | - Yating Lin
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan Province, China
| | - Haibo Long
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan Province, China
| | - Ye Li
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan Province, China
| | - Lulu Cai
- Center for Biosafety, Chinese Academy of Inspection and Quarantine, Sanya 572024, Hainan Province, China
| | - Shifang Li
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan Province, China
- Center for Biosafety, Chinese Academy of Inspection and Quarantine, Sanya 572024, Hainan Province, China
| | - Yuxin Ma
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan Province, China
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Venkataravanappa V, Vinaykumar HD, Hiremath S, Mantesh M, Shankarappa KS, Basha CRJ, Reddy MK, Reddy CNL. Molecular characterization of novel bipartite begomovirus associated with enation leaf disease of Garden croton (Codiaeum variegatum L.). Virusdisease 2022; 33:194-207. [DOI: 10.1007/s13337-022-00772-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 06/06/2022] [Indexed: 10/17/2022] Open
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