Somaclonal Variation in Eastern Cottonwood for Race-Specific Partial Resistance to Leaf Rust Disease

Prakash, C. S.; Thielges, B. A.

doi:10.1094/phyto-79-805

Cited by 25 publications

(8 citation statements)

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“…Gavazzi & co-workers (1987) were unable to identify increases in resistance to tobacco mosaic virus (TMV), Verticilliurn wilt or Meloidogyne incognita in somaclones derived from two susceptible tomato Binarov~i et al, 1990Pickering, 1989Ireland & Lacy, 1987Wright & Lacy, 1988;Heath-Pagliuso et al, 1988;Heath-Pagliuso & Rappaport, 1990Wright & Lacy, 1988Brown et al, 1986Brettell et al, 1980Hammerschlag, 1990aHammerschlag & Ognjanov, 1990Ostry & Skilling, 1988Prakash & Thielges, 1989Matern et al, 1978Shepard et al, 1980Cassells et al, 1986, 1987Thomson et al, 1986Evans et aL, 1986Sacrist~in, 1982, 1985MacDonald & Ingram, 1985Ling et al, 1985Krishnamurthi & Tlaskal, 1974Heinz et al, 1977Krishnamurthi, 1974: Heinz et al, 1977Heinz et al, 1977Liu &Chen, 1978Liu, 1981Sreenivasan et al, 1987Daub & Jenns, 1989Barden et al, 1986Smith & Murakishi, 1987Miller et al, 1985Evans, 1987Shahin & Spivey, 1986Shahin & Spivey, 1987…”

Section: Selection Of Disease Resistant Variants At the Plant Levelmentioning

confidence: 99%

Application of cell and tissue culture and in vitro selection for disease resistance breeding — a review

Bulk

1991

Euphytica

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Section: Selection Of Disease Resistant Variants At the Plant Levelmentioning

confidence: 99%

Application of cell and tissue culture and in vitro selection for disease resistance breeding — a review

Bulk

1991

Euphytica

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“…Our results suggest that qualitative reaction to rusts may be less subject to variation than quantitative characteristics. Quantitative variations have been also described for the susceptibility of poplar to Septoria musiva (Ostry & Skilling 1988) and to M. medusae (Prakash & Thielges 1989).…”

Section: Resultsmentioning

confidence: 99%

“…Such tolerance is potentially valuable and this has encouraged the assessment of somaclonal variation as a complement to classical hybridisation/selection breeding of food plants (e.g. Solanurn tuberosum; Behnke 1980, Triticum aestivum;Pauly et al 1987 or Brassica napus ;Sacristan 1982) and also poplar (Lester & Berbee 1977;Ostry & Skilling 1988;Prakash & Thielges 1989).…”

Section: Introductionmentioning

confidence: 99%

Somaclonal variation within poplar

Antonetti

Pinon

1993

Plant Cell Tiss Organ Cult

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One thousand and ninety-two poplars were regenerated in vitro from callus of 13 poplar clones representing the Leuce, Aigeiros and Tacamahaca sections. At lest 44 of the regenerants differed in some way from the original clones. Somaclonal variation occurred more frequently in poplars of the Leuce section (8%) than in those of the Aigeiros or Tacamahaca sections (1%). Variation was noticed in growth habit, leaf shape or indentation but not in the reaction to four Melampsora races. However, after one growing season in the field, a few regenerants from calli of two clones ('Ogy' and 'Rap') differed in their susceptibility vis ~ vis the original clones. Cultivation of callus from Leuce poplars that had survived exposure to increasing concentrations of toxins from Hypoxylon mammatum gave rise to a toxin-tolerant line from which toxin tolerant plants were regenerated. Flow cytometry to measure the DNA content of nuclei showed that regenerants tended to be tetraploid.

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“…The reduction or instability of the somaclonal variation in the seed generation is less of a problem with perennials that rely on vegetative propagation for multiplication. Here the incidence of disease resistance in somaclones has been very encouraging (Ostry & Skilling, 1988;Prakash & Thielges, 1989;Hammerschlag et al, 1994).…”

Section: Discussionmentioning

confidence: 99%

“…Alternatively, selection for disease resistance has been undertaken in vivo on plants regenerated directly from tissue cultures. Examples include sugar cane (Sreenivasan et al, 1987) and Eastern cotton wood (Prakash & Thielges, 1989).…”

Section: Introductionmentioning

confidence: 99%

Disease response of carrot and carrot somaclones to Alternaria dauci

2000

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Leaf spot of carrot, caused by the fungus Alternaria dauci, is a common disease of carrot throughout the world. To assess the disease response in different genotypes an in vitro method of assay has been developed. The terminal portion of excised mature leaves from carrot are incubated under lights at 25-26ЊC for 6 days with spores of A. dauci. After 6 days, chlorophyll and total soluble polyphenol contents of the leaves decline to a low level, whereas in the uninoculated control leaves levels of these compounds are largely unchanged. Electron microscope studies of the effect of infection on the ultrastructure of leaves from both cv. Fancy and wild plants show disintegration of the cell wall, plasmalemma and chloroplast membranes in the region close to the invading fungus. The response to A. dauci shows characteristics compatible with the presence of a phytotoxin.Seedling hypocotyls of the carrot cv. Fancy are used as a source of explants to initiate callus tissue and regenerate embryos. Regenerant somaclone plants show variation in morphology (crown number, height, leaf number, leaf shape and flowering time) and susceptibility to the pathogen as measured by the loss in chlorophyll from infected detached leaves after a 6-day period. Potentially susceptible and resistant regenerant plants are identified by the low and high chlorophyll levels, respectively, in excised leaves 6 days after infection. Selected high-and low-chlorophyll regenerant plants and seedling-derived cv. Fancy are self-pollinated, then the seeds are used to produce a progeny generation, which is assessed for morphological changes and disease resistance as before. The response of leaves of progeny plants to infection shows that the plants derived from high-chlorophyll regenerants still show a higher chlorophyll level after infection compared with leaves derived from low-chlorophyll and control plants. High chlorophyll levels in the presence of infection in the progeny of high-chlorophyll regenerants suggest that the capacity to resist infection in the selected somaclones is inherited.

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Somaclonal Variation in Eastern Cottonwood for Race-Specific Partial Resistance to Leaf Rust Disease

Cited by 25 publications

References 0 publications

Application of cell and tissue culture and in vitro selection for disease resistance breeding — a review

Application of cell and tissue culture and in vitro selection for disease resistance breeding — a review

Somaclonal variation within poplar

Disease response of carrot and carrot somaclones to Alternaria dauci

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