Incidence of ‘Candidatus Liberibacter asiaticus’-Infected Plants Among Citrandarins as Rootstock and Scion Under Field Conditions

• DOI: 10.1094/phyto-08-14-0211-r
• Publication Date: 2014-11-25T17:33:11Z
• Authors: Leonardo Pires Boava; Cíntia Helena Dua...; Mariângela Cristo...; Marcos Antonio Ma...
• Keywords: Citrus × sinensis; Field survey; Trifoliate orange

Huanglongbing (HLB), caused by the bacterium 'Candidatus Liberibacter' spp., is currently one of most serious diseases citrus plants and has substantial economic losses. Thus far, there no source genetic resistance to HLB in genus Citrus or its relatives. However, several studies have reported Poncirus trifoliata some hybrids be more tolerant disease. The main objective this study was report differences incidence 'Ca. L. asiaticus' infection citrandarin plants, from Sunki mandarin (Citrus sunki (Hayata) hort. ex Tanaka), trifoliate orange Rubidoux (P. (L.) Raf.)), after conducting an extensive survey under field conditions. These hybrid were established for approximately 7 years area with a high asiaticus'-infected plants. We selected two experimental areas (area A B), located 10 m apart. Area consists Pera sweet (C. sinensis Osb.) grafted onto 56 different rootstocks. B scions Rangpur lime limonia rootstock. Bacteria leaves roots detected using real-time quantitative polymerase chain reaction. 92% 14% B. Because infected occurred both areas, we examined whether P. rootstock influenced development also determined distribution tree tissues. Although does not present evidence regarding relation bacteria psyllids, future investigation, mainly promising response asiaticus', will help us understand probable mechanism defense identifying compounds that are very important as strategy combat HLB. Details these results presented discussed article.