Sweet Cherry Rootstock/Virus Interactions

Lang, Gregory A.; Howell, W. E.; Ophardt, David

doi:10.17660/actahortic.1998.468.36

Cited by 6 publications

(7 citation statements)

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“…Wild‐type ‘Gisela 7’ was initially identified as a valuable rootstock for commercial release, but this action was rescinded when its sensitivity to PNRSV became apparent. Similar to the previous report (Lang et al ., ), in this study nontransgenic ‘Gisela 7’ is susceptible to both PNRSV (Fulton G) and a combined PNRSV/PDV (CH39). After transformation with the RNAi vector pART27–PNRSV, transgenic ‘Gisela 7’ showed high resistance to PNRSV (Figure ).…”

Section: Discussionmentioning

confidence: 80%

“…‘Gisela 6’ is one of the most important new cherry rootstocks released in the past 20 years, due to its promotion of early and high productivity in commercial scion varieties. It has been characterized as being tolerant of infection by both PNRSV and Prune dwarf virus (PDV) (Lang et al ., ). When we inoculated standard ‘Gisela 6’ plants with a combined source of PNRSV/PDV (CH39), our results were consistent with previous reports.…”

Section: Resultsmentioning

confidence: 97%

“…Sweet cherry scions generally tolerate PNRSV infection with no or only mild symptoms, but certain viral isolates can cause rugose mosaic disease, which affects fruit quality, ripening time and tree health. Cherry rootstock genotypes range from hypersensitive to tolerant for some of these common viruses such as PNRSV (Lang et al ., ). However, even if a cherry scion genotype tolerates infection by a mild strain of PNRSV, when the virus reaches the graft union with a sensitive rootstock genotype, a hypersensitive reaction will occur that can cause vascular necrosis at the union, resulting in tree decline and ultimately death.…”

Section: Introductionmentioning

confidence: 97%

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Engineering cherry rootstocks with resistance to Prunus necrotic ring spot virus through RNAi‐mediated silencing

Song

Sink

Walworth

et al. 2013

Plant Biotechnology Journal

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Summary Prunus necrotic ringspot virus (PNRSV) is a major pollen‐disseminated ilarvirus that adversely affects many Prunus species. In this study, an RNA interference (RNAi) vector pART27–PNRSV containing an inverted repeat (IR) region of PNRSV was transformed into two hybrid (triploid) cherry rootstocks, ‘Gisela 6’ (GI 148‐1) and ‘Gisela 7’(GI 148‐8)’, which are tolerant and sensitive, respectively, to PNRSV infection. One year after inoculation with PNRSV plus Prune Dwarf Virus, nontransgenic ‘Gisela 6’ exhibited no symptoms but a significant PNRSV titre, while the transgenic ‘Gisela 6’ had no symptoms and minimal PNRSV titre. The nontransgenic ‘Gisela 7’ trees died, while the transgenic ‘Gisela 7’ trees survived. These results demonstrate the RNAi strategy is useful for developing viral resistance in fruit rootstocks, and such transgenic rootstocks may have potential to enhance production of standard, nongenetically modified fruit varieties while avoiding concerns about transgene flow and exogenous protein production that are inherent for transformed fruiting genotypes.

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Section: Discussionmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

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Engineering cherry rootstocks with resistance to Prunus necrotic ring spot virus through RNAi‐mediated silencing

Song

Sink

Walworth

et al. 2013

Plant Biotechnology Journal

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“…(steppe or ground cherry) are known to exhibit varying levels of sensitivity to these viruses, and hence so do some of the new rootstocks that have been selected or hybridized from these species. Lang et al (1997Lang et al ( , 1998 have shown that the virus can pass from the point of infection (young flowering shoots) to the graft union within 10 weeks, whereupon a hypersensitive rootstock may begin exuding gum, followed by yellowing and pre-mature abscission of leaves. During the second growing season following infection, hypersensitive trees collapse and die.…”

Section: Screening For Virus Sensitivitymentioning

confidence: 99%

“…Little research has been conducted on the disease susceptibilities of these new rootstocks in North America, with the exception of bacterial canker (Pseudomonas syringae pv. syringae van Hall) (Krzesinska and Azarenko, 1992), Phytophthora (see below) and Armillaria (see below) root rots (Cummins et al, 1986;Proffer et al, 1988), and the ilarvirus sensitivity described above (Lang et al, 1997(Lang et al, , 1998. While the severity and longevity of bacterial canker infections vary with climate and can sometimes be managed, selection of rootstocks that are less susceptible is a high priority in certain areas like Oregon's Willamette valley.…”

Section: Other Disease Sensitivitiesmentioning

confidence: 99%

Precocious, Dwarfing, and Productive—How Will New Cherry Rootstocks Impact the Sweet Cherry Industry?

Lang¹

2000

horttech

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Sweet cherries (Prunus avium L.) can be one of the most profitable tree fruits cultivated in temperate climates. While cherry trees grow naturally to relatively tall heights (≈35 ft [≥10 m]), new size-controlling cherry rootstocks similar to those used in high-density apple (Malus domestica Borkh.) orchards are now a reality. The Gisela (GI.) and Weiroot (W.) series from Germany, the Gran Manier (GM.) series from Belgium, the P-HL series from Czech Republic, `Tabel Edabriz' from France, and others of international origin are at various stages of scientific and field testing in North America, with some now being used for commercial fruit production. These stocks confer several advantageous traits besides vigor control, including precocious fruiting and high productivity. While these beneficial traits are exciting, serious problems also have been documented on occasion, such as small fruit size and tree decline. As many of these rootstocks are interspecific Prunus L. hybrids, might there be significant limitations for fruit quality and orchard longevity? What is known about their tolerance to various soil types and/or climatological stresses? What is known about their susceptibilities to pathogens and pests? Further, with the U.S. and worldwide orchard area planted to fresh-market sweet cherries already expanding to record levels throughout the 1990s and a time-honored agricultural tendency toward overproduction until grower profits are minimized (e.g., recent international apple markets), what might be the future impact of such precocious, productive rootstocks on sweet cherry profitability and sustainable production? This overview addresses these topics, providing some answers and some areas for future scientific investigation and industry discussion.

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Cherries

Iezzoni

Temperate Fruit Crop Breeding

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Sweet Cherry Rootstock/Virus Interactions

Cited by 6 publications

References 0 publications

Engineering cherry rootstocks with resistance to Prunus necrotic ring spot virus through RNAi‐mediated silencing

Engineering cherry rootstocks with resistance to Prunus necrotic ring spot virus through RNAi‐mediated silencing

Precocious, Dwarfing, and Productive—How Will New Cherry Rootstocks Impact the Sweet Cherry Industry?

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