Ultrastructural Changes in Avocado Leaf Tissue Infected with Avocado Sunblotch

Graça, J. V. da; Martin, Marta

doi:10.1111/j.1439-0434.1981.tb03379.x

Cited by 14 publications

(4 citation statements)

References 19 publications

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“…Virus infection can impair photosynthesis by decreasing carboxylation and mesophyll conductance (Sampol et al, 2003 ), reducing carboxylative efficiency (Pérez-Clemente et al, 2015 ), modifying the structure of chloroplasts, or reducing the number of active reaction centers (Prod'homme et al, 2001 ; Zechmann et al, 2003 ; Bhattacharyya et al, 2015 ; Otulak et al, 2015 ). Previous studies also reported that the chloroplast structure of viroid-infected plant tissues was modified, particularly thylakoid membrane abnormalities and paucity of grana in many viroid-host combinations (Hari, 1980 ; da Graça and Martin, 1981 ; Kojima et al, 1983 ; Momma and Takahashi, 1983 ). The infection of peach latent mosaic viroid (PLMVd) with a specific structural motif (12- to 13-nucleotide insertion) inhibited chloroplast development (Rodio et al, 2007 ).…”

Section: Discussionmentioning

confidence: 93%

Global Transcriptomic Changes Induced by Infection of Cucumber (Cucumis sativus L.) with Mild and Severe Variants of Hop Stunt Viroid

Xia

Hou

et al. 2017

Front. Microbiol.

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Fifteen years after transfer to hops, hop stunt viroid-grapevine (HSVd-g) was replaced by HSVd-hop (HSVd-h), a sequence variant that contains changes at five different positions. HSVd-g54 is a laboratory mutant derived from HSVd-g that differs from its progenitor by a single G to A substitution at position 54. While infection by HSVd-h induces only mild stunting in cucumber (Cucumis sativus L.), HSVd-g54 induces much more severe symptoms in this indicator host. Comparison of transcriptome profiles of cucumber infected with HSVd-h or HSVd-g54 with those of mock-inoculated controls obtained by whole transcriptome shotgun sequencing revealed that many genes related to photosynthesis were down-regulated following infection. In contrast, genes encoding RNA-dependent RNA polymerase 1 (CsRDR1), especially CsRDR1c1 and CsRDR1c2, as well as those related to basal defense responses were up-regulated. Expression of genes associated with phytohormone signaling pathways were also altered, indicating that viroid infection initiates a complex array of changes in the host transcriptome. HSVd-g54 induced an earlier and stronger response than HSVd-h, and further examination of these differences will contribute to a better understanding of the mechanisms that determine viroid pathogenicity.

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Section: Discussionmentioning

confidence: 93%

Global Transcriptomic Changes Induced by Infection of Cucumber (Cucumis sativus L.) with Mild and Severe Variants of Hop Stunt Viroid

Xia

Hou

et al. 2017

Front. Microbiol.

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“…For example, in some infections by members of the Pospiviroidae changes have been observed in membranous structures called "plasmalemmasomes" (Semancik and Conejero-Tomas, 1987). Various degenerative abnormalities have been found in the chloroplasts of viroid-infected cells (da Graça and Martin, 1981). Various degenerative abnormalities have been found in the chloroplasts of viroid-infected cells (da Graça and Martin, 1981).…”

Section: Cytopathic Effectsmentioning

confidence: 99%

Agents Resembling or Altering Virus Diseases

Hull

2014

Plant Virology

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“…The symptoms resulting from viroid infection can affect the whole plant (stunting), stems (shortening, thickening), bark (scaling, pitting, gumming), leaves (epinasty, rugosity, mosaic, chlorosis, mottling, browning), flowers (variegation), fruits (size, colour, deformation) and tubers (malformation). Morphological and cytological symptoms have also been well documented (Semancik and Conejero‐Tomas, 1987) as distortions of cell wall and plasma membrane (Momma and Takahashi, 1982; Semancik and Wanderwoude 1976), chloroplasts (Da Graça and Martin, 1981; Hari, 1980; Momma and Takahashi, 1982) and mitochondria (Paliwal and Singh, 1981).…”

Section: Introductionmentioning

confidence: 99%

Microarray analysis of Etrog citron (Citrus medica L.) reveals changes in chloroplast, cell wall, peroxidase and symporter activities in response to viroid infection

Rizza

Conesa

Juárez

et al. 2012

Molecular Plant Pathology

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Viroids are small (246-401 nucleotides), single-stranded, circular RNA molecules that infect several crop plants and can cause diseases of economic importance. Citrus are the hosts in which the largest number of viroids have been identified. Citrus exocortis viroid (CEVd), the causal agent of citrus exocortis disease, induces considerable losses in citrus crops. Changes in the gene expression profile during the early (pre-symptomatic) and late (post-symptomatic) stages of Etrog citron infected with CEVd were investigated using a citrus cDNA microarray. MaSigPro analysis was performed and, on the basis of gene expression profiles as a function of the time after infection, the differentially expressed genes were classified into five clusters. FatiScan analysis revealed significant enrichment of functional categories for each cluster, indicating that viroid infection triggers important changes in chloroplast, cell wall, peroxidase and symporter activities.

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Ultrastructural Changes in Avocado Leaf Tissue Infected with Avocado Sunblotch

Cited by 14 publications

References 19 publications

Global Transcriptomic Changes Induced by Infection of Cucumber (Cucumis sativus L.) with Mild and Severe Variants of Hop Stunt Viroid

Global Transcriptomic Changes Induced by Infection of Cucumber (Cucumis sativus L.) with Mild and Severe Variants of Hop Stunt Viroid

Agents Resembling or Altering Virus Diseases

Microarray analysis of Etrog citron (Citrus medica L.) reveals changes in chloroplast, cell wall, peroxidase and symporter activities in response to viroid infection

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