Academic literature on the topic 'SOLANUM PTYCANTHUM'

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Journal articles on the topic "SOLANUM PTYCANTHUM"

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BASSETT, I. J., and D. B. MUNRO. "THE BIOLOGY OF CANADIAN WEEDS.: 67. Solarium ptycanthum Dun., S. nigrum L. and S. sarrachoides Sendt." Canadian Journal of Plant Science 65, no. 2 (1985): 401–14. http://dx.doi.org/10.4141/cjps85-055.

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A descriptive key is provided for eight species of nightshade, Solanum spp., occurring in Canada. The biology for three of four closely related taxa, eastern black nightshade, Solanum ptycanthum Dun. ex DC; black nightshade, S. nigrum L.; and hairy nightshade, S. sarrachoides Sendt., weedy in various parts of the country, is discussed. American nightshade, S. americanum Mill., a name once applied to S. ptycanthum, is actually very rare in Canada and its biology is only partially discussed in this paper.Key words: Eastern black nightshade, black nightshade, hairy nightshade, weed biology, Solan
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Yu, Chang-Yeon, and John Masiunas. "SOMACLONAL VARIATION IN SOLANUM AND LYCOPERSICON GENOTYPES." HortScience 25, no. 9 (1990): 1082a—1082. http://dx.doi.org/10.21273/hortsci.25.9.1082a.

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The objective of this study was to investigate the chromosomal and genotypic variation in regenerated plants of Solarium and Lycopersicon. Calli of Lycopersicon peruvianum genotypes PI199380, PI126345, PI251301, and LA1373, along with Solanum ptycanthum were transferred onto media consisting of MS salts with Gamborg vitamins. The shoots formed were rooted in vitro and transferred to greenhouse soil. Actively growing root tips were harvested and pretreated, fixed, hydrolyses and stained. Pollen mother cells were fixed in propionic alcohol solution and stained with aceto-carmine. The number of c
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Yu, Chang-Yeon, and John Masiunas. "IMPROVED PLANT REGENERATION OF SOLANUM AND LYCOPERSICON GENOTYPES FROM LONG-TERM CALLUS CULTURE." HortScience 25, no. 9 (1990): 1121b—1121. http://dx.doi.org/10.21273/hortsci.25.9.1121b.

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Repeated callus sub-culture reduce the regeneration capacity in many species. Our studies determined the effect of genotype and medium on regeneration of several Solanum and Lycopersicon genotypes from long-term callus cultures. In the first study, 13 genotypes were transferred to regeneration medium, including: Murashige and Skoog plus Gamborg Vitamins (MG); Murashige and Skoog (MS); Gamborg (GM); and white (WM). The greatest shoot regeneration was on the MG medium, containing the highest levels of thiamine. Shoot differentiation was greatest with 0.2 mg/l IAA and 2 mg/l BA. No plants were re
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Hermanutz, L. A., and S. E. Weaver. "Germination and growth of Solanum ptycanthum and Solanum sarrachoides." Canadian Journal of Plant Science 71, no. 1 (1991): 167–74. http://dx.doi.org/10.4141/cjps91-017.

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The distribution and abundance of hairy nightshade (Solanum sarrachoides Sendt.) has been increasing relative to that of eastern black nightshade (Solanum ptycanthum Dun.) in cultivated fields in southern Ontario. The germination and early growth of the two species were compared under controlled environmental conditions. Individual seeds of hairy nightshade weigh almost twice as much as those of eastern black nightshade. Time to 50% germination of seeds of hairy nightshade was faster over a range of temperatures, and total germination in the dark and at low temperature was greater compared to
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Crotser, Michael P., and John B. Masiunas. "EASTERN BLACK (SOLANUM PTYCANTHUM) INTERFERENCE WITH PEA." HortScience 28, no. 5 (1993): 453f—453. http://dx.doi.org/10.21273/hortsci.28.5.453f.

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Field and greenhouse experiments determined the critical period for eastern black nightshade control in processing peas and the effect of nitrogen on nightshade competitiveness. `Spring' peas were drilled with a 18 cm between row spacing on May 29 and July 31. Nightshade at 10 plants m-2 were transplanted at 0, 2, 4, and 6 weeks. Nightshade established at pea planting were removed at 2, 4, and 6 weeks. Nightshade emerging after pea establishment did not reduce yields. Pea yields were reduced when nightshade interference occurred for the first four weeks. The yield reduction was caused by fewer
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Yu, Chang-Yeon, and John Masiunas. "PLANTLET REGENERATION FROM ACIFLUORFEN-TOLERANT CELL LINES OF SOLANUM PTYCANTHUM AND LYCOPERSICON PERUVIANUM." HortScience 25, no. 9 (1990): 1082b—1082. http://dx.doi.org/10.21273/hortsci.25.9.1082b.

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Friable callus of Solanum ptycanthum and L. peruvianum PI199380 clone 149 were subcultured on liquid Murashige and Skoog salts and Gamborg Vitamin medium with 2,4-D (1mg/l) until a fine suspension of cells was obtained. The suspension cultured cells were then plated on selection medium. Twenty-five acifluorfen-tolerant cell lines of Solanum ptycanthum and fourteen tolerant Lycopersicon peruvianum cell lines were obtained by a stepwise increase in concentration of acifluorfen. Acifluorfen-tolerant cell lines were transferred on to regeneration media with the herbicide. Shoot regeneration differ
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Andersen, Robert N., and H. Lynn Walker. "Colletotrichum coccodes: A Pathogen of Eastern Black Nightshade (Solanum ptycanthum)." Weed Science 33, no. 6 (1985): 902–5. http://dx.doi.org/10.1017/s0043174500083570.

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The fungusColletotrichum coccodes(Wallr.) Hughes was isolated from diseased plants of eastern black nightshade (Solanum ptycanthumDun. ♯ SOLPT) growing in the field. In greenhouse experiments, the isolate was highly pathogenic to eastern black nightshade and less so to seven other weedy species within the Solanaceae. No disease symptoms were observed on seedlings of tomato (Lycopersicon esculentumMill.), potato (Solanum tuberosumL.), or 10 other species inoculated with the isolate. Dew periods of 16 h or longer were required for maximum disease development. This requirement could limit the pra
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Hermanutz, L. A., and S. E. Weaver. "Variability in metribuzin tolerance among ruderal and agrestal populations of Solanum ptycanthum Dun." Canadian Journal of Plant Science 74, no. 2 (1994): 395–401. http://dx.doi.org/10.4141/cjps94-075.

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Solanum ptycanthum Dun. is an annual weed of both agrestal and ruderal habitats in southern Ontario, which is the northern limit of its distribution. Plants of S. ptycanthum are introduced annually to the tomato-production areas of Ontario via the importation of tomato transplants from Georgia and North Carolina. The objective of this study was to test for genetic differences in tolerance to the herbicide metribuzin among agrestal and ruderal populations from southwestern Ontario and agrestal populations from Georgia and North Carolina. We compared growth responses among and within populations
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Zhou, Jingkai, Edward L. Deckard, and Calvin G. Messersmith. "Factors affecting eastern black nightshade (Solanum ptycanthum) seed germination." Weed Science 53, no. 5 (2005): 651–56. http://dx.doi.org/10.1614/ws-04-168r2.1.

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Effects of environmental factors, especially light, on eastern black nightshade seed germination were studied under growth chamber conditions. Germination occurred only when temperatures were 20 C or higher for 12 to 24 h d−1. Optimum germination occurred within the constant temperature range of 28 to 33 C or with alternating temperatures of 30/25 and 35/30 C. In the dark, eastern black nightshade germination was poor except at high alternating temperatures of 30/25 and 35/30 C. Seed germination was enhanced by light when temperatures were suboptimal. Imbibition was a prerequisite for response
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Kolasani, Vamsgita, and John Masiunas. "Herbicide Tolerance Mechanisms in Eastern Black Nightshade (Solanum ptycanthum)." HortScience 31, no. 4 (1996): 577d—577. http://dx.doi.org/10.21273/hortsci.31.4.577d.

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Eastern black nightshade is one of the problematic weeds in vegetables and soybeans in the Midwest. It is representative of a rapidly growing complex of broadleaf weeds where herbicide resistance would be expected to occur. Eastern black nightshade calli lines that are resistant and susceptible to acifluorfen were maintained on the medium without the herbicide. After two years, these lines were tested for tolerance to acifluorfen and paraquat. Tolerance to acifluorfen was maintained in the previously selected lines. The lines were also cross tolerant to paraquat. Plants were regenerated from t
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Dissertations / Theses on the topic "SOLANUM PTYCANTHUM"

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Buckelew, Juliana Kirsten. "Eastern black nightshade (Solanum ptycanthum Dun.) management in plasticulture tomatoes (Lycopersicon esculentum)." 2005. http://www.lib.ncsu.edu/theses/available/etd-03162005-084229/unrestricted/etd.pdf.

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Heider, Daniel J. "Growth and development responses of eastern black nightshade (Solanum ptycanthum Dun.) and hairy nightshade (Solanum sarrachoides Sendt.) to crop competition." 1996. http://catalog.hathitrust.org/api/volumes/oclc/36297030.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1996.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 123-129).
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