Phloem restriction of viroids in three citrus hosts is overcome by grafting with Etrog citron: potential involvement of a translocatable factor
Bani-Hashemian, Seyed Mehdi and Pensabene-Bellavia, Giovanni and Duran-Vila, Nuria and Serra, Pedro,, 96, 2405-2410 (2015),
doi = https://doi.org/10.1099/vir.0.000154,
publicationName = Microbiology Society,
issn = 0022-1317,
abstract= Viroid systemic spread involves cell-to-cell movement from initially infected cells via plasmodesmata, long-distance movement within the phloem and again cell-to-cell movement to invade distal tissues including the mesophyll. Citrus exocortis viroid (CEVd), hop stunt viroid, citrus bent leaf viroid, citrus dwarfing viroid, citrus bark cracking viroid and citrus viroid V remained phloem restricted when singly infecting Citrus karna, Citrus aurantium and Poncirus trifoliata, but not Etrog citron, where they were additionally detected in mesophyll protoplasts. However, when CEVd-infected C. karna was side-grafted with Etrog citron – with the resulting plants being composed of a C. karna stock and an Etrog citron branch – the viroid was detected in mesophyll protoplasts of the former, thus indicating that the ability of Etrog citron to support viroid invasion of non-vascular tissues was transferred to the stock. Further results suggest that a translocatable factor from Etrog citron mediates this viroid trafficking.,
language=,
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