Studies on viral movement of Cucumber mosaic virus in infected plants

Ohki, Satoshi T.

doi:10.1007/s10327-010-0266-x

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…The same pattern is seen in virus transport. For example, Cucumber mosaic virus travels in the external, rather than the internal phloem of Tetragonia expansa (Ohki, 2010) and tobacco mosaic virus is exported from Nicotiana benthamiana leaves in the external phloem and imported into sink leaves in the internal phloem (Cheng et al, 2000). …”

Section: Heterogeneity In the Transport Pathwaymentioning

confidence: 99%

Structural and functional heterogeneity in phloem loading and transport

2013

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The phloem is often regarded as a relatively straightforward transport system composed of loading (collection), long-distance (transport), and unloading (release) zones. While this simple view is necessary and useful in many contexts, it belies the reality, which is that the phloem is inherently complex. At least three types of sieve element–companion cell complexes are found in minor veins of leaves. Individual species may have more than one type, indicating that they employ multiple loading strategies, even in the same vein. Gene expression data in particular point to heterogeneity in sieve element–companion cell complexes of minor veins, perhaps in all flowering plants. Phloem heterogeneity in the transport phloem is also evident in many species based on anatomical, biochemical and gene expression data. In this regard, members of the Cucurbitaceae are especially complex and interesting. We conclude that a hidden world of specialized phloem function awaits discovery.

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Section: Heterogeneity In the Transport Pathwaymentioning

confidence: 99%

Structural and functional heterogeneity in phloem loading and transport

2013

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“…However, information on specific functions of the IP and EP is limited. In tomato, Tetragonia expansa and Nicotiana benthamiana, photoassimilates and viruses are exported from mature leaves in the EP, while import into very young leaves takes place in the IP (Houngbossa and Bonnemain, 1985;Cheng et al, 2000;Ohki, 2010). In Catharanthus roseus, early steps in monoterpene indole alkaloid synthesis are restricted to parenchyma cells associated with IP (Geu-Flores et al, 2012), and it is the IP of the stem that transports cardenolides (Botha et al, 1977).…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic and functional analysis of cucumber (Cucumis sativus L.) fruit phloem during early development

Sui

Nie

et al. 2018

The Plant Journal

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The phloem of the Cucurbitaceae has long been a subject of interest due to its complex nature and the economic importance of the family. As in a limited number of other families, cucurbit phloem is bicollateral, i.e. with sieve tubes on both sides of the xylem. To date little is known about the specialized functions of the internal phloem (IP) and external phloem (EP). Here, a combination of microscopy, fluorescent dye transport analysis, micro-computed tomography, laser capture microdissection and RNA-sequencing (RNA-Seq) were used to study the functions of IP and EP in the vascular bundles (VBs) of cucumber fruit. There is one type of VB in the peduncle, but four in the fruit: peripheral (PeVB), main (MVB), carpel (CVB) and placental (PlVB). The VBs are bicollateral, except for the CVB and PlVB. Phloem mobile tracers and C applied to leaves are transported primarily in the EP, and to a lesser extent in the IP. RNA-Seq data indicate preferential gene transcription in the IP related to differentiation/development, hormone transport, RNA or protein modification/processing/transport, and nitrogen compound metabolism and transport. The EP preferentially expresses genes for stimulus/stress, defense, ion transport and secondary metabolite biosynthesis. The MVB phloem is preferentially involved in photoassimilate transport, unloading and long-distance signaling, while the PeVB plays a more substantial role in morphogenesis and/or development and defense response. CVB and PlVB transcripts are biased toward development of reproductive organs. These findings provide an integrated view of the differentiated structure and function of the vascular tissue in cucumber fruit.

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“…This can result in disease symptoms in resistant plants at elevated temperatures (Celebi-Toprak et al, 2003;Zhu et al, 2010). Temperature sensitivity of plant resistance genes to virus infection has been reported in a number of cases, including genes conferring resistance to Cucumber mosaic virus (CMV) in Cucumis fi garei Delile ex Naudin (Ohki, 2010) and potato (Solanum tuberosum L.) (Celebi-Toprak et al, 2003), Tobacco mosaic virus in tomato (Solanum lycopersicum L.) (Fraser and Loughlin, 1982), Turnip mosaic virus in winter oilseed rape [Brassica napus subsp. oleifera (Delile) Sinskaya] (Walsh, 1989), Watermelon mosaic virus-2 in bean (Phaseolus vulgaris L.) (Kyle and Provvidenti, 1987), and Wheat streak mosaic virus in wheat (Triticum aestivum L.) (Seifers et al, 2006(Seifers et al, , 2007.…”

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confidence: 99%

Diverse Soybean Accessions Identified with Temperature‐Sensitive Resistance to Tobacco Streak Virus

et al. 2012

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Tobacco streak virus (TSV) is a pathogeii that has been reported in soybean [Glycine max (L.) Merr.] in Brazil and the United States, for which resistance has only been reported in the "haytype" soybean cultivar Tanner. To find additional resistant soybean genotypes, >1000 soybean accessions from the USDA Soybean Germplasm Collection were evaluated for resistance to TSV in the greenhouse. No resistance was found in a 94-accession ancestral set, but 19 of 926 accessions screened from a geographically diverse set of soybean accessions were resistant to TSV infection. Further investigation showed that the resistance of the soybean accessions was temperature sensitive. When TSV-resistant plants were inoculated with TSV and grown at 24°C for 17 to 20 d in a growth chamber, only 7% of inoculated plants became infected, based on virus antigen detected in noninoculated trifoliolate leaves. In contrast, when inoculated with TSV and grown at 32°C for

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Studies on viral movement of Cucumber mosaic virus in infected plants

Cited by 4 publications

References 11 publications

Structural and functional heterogeneity in phloem loading and transport

Structural and functional heterogeneity in phloem loading and transport

Transcriptomic and functional analysis of cucumber (Cucumis sativus L.) fruit phloem during early development

Diverse Soybean Accessions Identified with Temperature‐Sensitive Resistance to Tobacco Streak Virus

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