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Leht 1 alates 29 tulemused
Physiology of Tuberization in Solanum tuberosum L: cis-Zeatin Riboside in the Potato Plant: Its Identification and Changes in Endogenous Levels as Influenced by Temperature and Photoperiod.
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Using high pressure liquid chromatography, the cucumber cotyledon bioassay, and mass spectrometry a cytokinin isolated from Solanum tuberosum L. cv. Katahdin plant tissues has been identified as cis-zeatin riboside. Zeatin riboside (ZR) levels in plants grown under inducing conditions (28 C day and
The control of bud dormancy in potato tubers. Measurement of the seasonal pattern of changing concentrations of zeatin-cytokinins.
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A radioimmunoassay, combined with high-performance liquid chromatography, has been used to analyse the zeatin-type cytokinins of potato (Solanum tuberosum L. cv. Majestic) tubers and tuber buds throughout growth and storage. During tuber growth, zeatin riboside was the predominant cytokinin detected
Identification of an N-Glucoside of cis-Zeatin from Potato Tuber Sprouts.
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A compound was isolated from potato (Solanum tuberosum L. cv Bintje) tuber sprouts by immunoaffinity chromatography with antibodies against the cytokinins zeatin riboside and isopentenyladenosine. Analysis by ultraviolet spectroscopy and gas chromatography-mass spectrometry of derivatives identified
Potato tuber cytokinin oxidase/dehydrogenase genes: biochemical properties, activity, and expression during tuber dormancy progression.
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The enzymatic and biochemical properties of the proteins encoded by five potato cytokinin oxidase/dehydrogenase (CKX)-like genes functionally expressed in yeast and the effects of tuber dormancy progression on StCKX expression and cytokinin metabolism were examined in lateral buds isolated from
Overexpression of a bacterial 1-deoxy-D-xylulose 5-phosphate synthase gene in potato tubers perturbs the isoprenoid metabolic network: implications for the control of the tuber life cycle.
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Potato tubers were engineered to express a bacterial gene encoding 1-deoxy-D-xylulose 5-phosphate synthase (DXS) in order to investigate the effects of perturbation of isoprenoid biosynthesis. Twenty-four independent transgenic lines out of 38 generated produced tubers with significantly elongated
[Effects of drought stress on root development and physiological characteristics of sweet potato at seedling stage].
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The effects of drought stress on root morphology, endogenous hormones, chlorophyll fluorescence and active oxygen metabolism in three different stages of sweet potato rooting, branching and tubering stage were studied by sand culture method with 10% PEG-6000 simulating drought stress. The results
Plant regeneration via somatic embryogenesis, and transient gene expression in sweet potato protoplasts.
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A method for regenerating plants from petiole protoplasts of the in vitro-raised sweet potato cultivar Jewel is described. Protoplast yields of 3.0-5.0×106 were obtained following 4-6 h digestion of 1- to 2-cm petioles (1 g fresh weight) with 1% Cellulase-R10, 2% Macerozyme-R10, and 0.3%
Plant regeneration from protoplast culture of sweet potato (Ipomoea batatas Lam.).
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This is the first report on successful plant regeneration from protoplasts of sweet potato. Two cultivars (Guyana and Duclos XI) of sweet potato plants propagated under in vitro conditions were used as the source of protoplasts. Green compact calli with meristematic areas were induced in the medium
An efficient cryopreservation procedure for potato (Solanum tuberosum L.) utilizing the new ice blocking agent, Supercool X1000.
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Cryopreservation has been recognized as a practical and efficient tool for long-term storage of vegetatively propagated plants. This study was conducted to investigate effects of modified vitrification techniques on cryopreservation of potato. In vitro plants of potato cultivars "Superior" and
T-DNA genes to study plant development: precocious tuberisation and enhanced cytokinins in A. tumefaciens transformed potato.
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Potato Line Mb1501B is a derivative of the cultivar Maris Bard (Solanum tuberosum), transformed with T-DNA from A. tumefaciens strain LBA1501. In culture it grew as frequently branching stunted shoots with a basal callus, lacking roots. These shoots did not form tubers. When grafted, Mb1501B shoots
HORMONAL STATUS AND ACTIVITY OF THE ANTIOXIDANT SYSTEM OF SOLANUM TUBEROSUM UNDER THE ACTION OF COLCHICINES AS THE INHIBITOR OF MICROTUBULE.
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The content and the ratio of phytohormones, the activity of enzymes-antioxidants and lipid peroxidation, contents of proline and carotenoids in potato plants under the action of colchicines have been investigated. We have identified specific changes in hormonal balance of the plant initiated by the
Specific interaction of cytokinins and their analogs with rotenone-sensitive internal NADH dehydrogenase in potato tuber mitochondria.
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Effects of cytokinins were studied on rotenone-sensitive NADH dehydrogenase in mitochondria from fresh potato tubers (Solanum tuberosum), in consideration of the operation of external and rotenone-insensitive internal NADH dehydrogenases that has not been fully accounted for in previous studies. In
Somatic embryogenesis in Solanum tuberosum from cell suspension cultures: histological analysis and extracellular protein patterns.
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An embryogenic cell suspension, continuously grown in Murashige and Skoog (MS) medium with 0.5 mg/L of 2,4-dichlorophenoxyacetic acid, was established from friable callus of Solanum tuberosum internode sections. The cell suspension was predominantly composed of cell masses and free embryogenic
A modified method for routine Agrobacterium-mediated transformation of in vitro grown potato microtubers.
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In vitro-grown potato (Solanum tuberosum L.) microtubers were used as an explant source in the production of transgenic plants by Agrobacterium-mediated gene transfer. In this study we tested four diverse potato cultivars, Lemhi Russet, Russet Burbank, Wauseon, and Yankee Chipper on various levels
[Effect of ambiol and 2-chloroethylphosphonic acid on the content of phytohormones in potato leaves and tubers].
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The effects of the antioxidant Ambiol and 2-chlorethylphosphonic acid (2-CEPA) on individual concentrations and concentration ratios of phytohormones, photosynthesis and photophosphorylation rates, sucrose and starch content in tubers, and plant productivity were studied in potato (Solanum tuberosum
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