Use of an Immunocapture‐Polymerase Chain Reaction Procedure for the Detection of Grapevine Virus A in Kober Stem Grooving‐Infected Grapevines

Journal of Phytopathology - Tập 143 Số 6 - Trang 369-373 - 1995
Sylvie Chevalier1, Charles Greif, J.‐M. Clauzel, Bernard Walter, C. Fritsch
1Laboratoire de Recherche sur la Réactivité des Solides

Tóm tắt

AbstractReliable and highly sensitive detection of grapevine virus A (GVA) in grapevine leaf tissue by reverse transcription‐initiated polymerase chain reaction was achieved after enrichment and partial purification of the virus from grapevine crude sap by an immunocapture (IC) procedure. In comparison with ELISA the gain of sensitivity was estimated up to 1000‐fold in grapevine mature leaf tissue. Using IC‐reverse transcription polymerase chain reaction (IC‐RT‐PCR), GVA could be detected in very young grapevine tissue where the virus titre was largely below the detection limit of ELISA. The comparison of IC‐RT‐PCR and biological indexing results for about 60 grapevine accessions revealed a good correlation between the presence of GVA and the development of Kober stem grooving (KSG) symptoms in the specific indicator rootstock Kober 5BB. Moreover, the elimination of KSG by heat treatment in two Vitis vinifera cultivars, Savagnin rose and Servant, was accompanied by the loss of detection of GVA by PCR, thus providing further argument for the involment of GVA in the aetiology of KSG.

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