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Página 1 a partir de 53 resultados
Polyribosome Formation in Relation to Cytokinin-induced Cell Division in Suspension Cultures of Glycine max [L.] Merr.
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We have investigated the relationship between cell proliferation and protein synthetic capacity in a cytokinin-requiring strain of cultured soybean cells (Glycine max [L.] Merr. cv. Sodifuri, of cotyledonary origin) in suspension culture. When transferred to a defined medium lacking cytokinin, very
Cytokinin modification of metabolism of p-coumaric acid by a cell suspension of soybean (Glycine max (L.) Merrill).
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Cells of a soybean tissue strain suspended in an aerated liquid medium caused the disappearance of p-coumaric acid from the medium. The rate of disappearance was modified by cytokinins. When the coumarate and the cytokinin were added to the medium simultaneously, disappearance was increased if the
Cytokinin inhibition of respiration by cells and mitochondria of soybean, Glycine max (L.) Merrill.
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Cells of a soybean tissue strain, suspended in an aerated liquid medium, caused disappearance of p-coumaric acid from the medium and oxidation of guaiacol, benzidine, pyrogallol, L-dihydroxyphenylalanine and L-epinephrine. Both the disappearance and the oxidations were inhibited by
Ontogenetic variation of four cytokinins in soybean root pressure exudate.
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Cytokinins exported from the root may be involved in the correlative control of plant development. To test this hypothesis in soybean ((Glycine max [L.] Merr. cv. McCall, cv Chippewa 64, and cv Hodgson 78), cytokinins were intercepted en route from the root to the shoot by collecting root pressure
Substituted nitroguanidines provide cytokinin activity during in vitro cultivation of plant tissues.
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Synthetic nitroguanidine derivatives can be used as alternatives to the traditional adenine-containing cytokinins used in plant tissue culture. First, nitroguanidine derivatives (NG) mimicked the typical activity of two standard cytokinins, 6-benzylaminopurine (BAP) and 2-isopentenyladenine (2iP) in
The stability and biological activity of cytokinin metabolites in soybean callus tissue.
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The activity, uptake and metabolism of cytokinin metabolites was determined in soybean (Glycine max (L.) Merr.) callus tissue. The following activity sequence was established: zeatin riboside (ZR)>zeatin (Z)>O-glucosides of Z, ZR and their dihydro derivatives>lupinic acid (an alanine conjugate of
Mechanical inhibition of hypocotyl elongation induces radial enlargement: implications for cytokinin action.
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Excised elongating segments from 3-day-old soybean (Glycine max var. Wayne) seedlings radially enlarged when auxin-promoted elongation was mechanically inhibited. Growth was similar to segments treated with auxin plus cytokinin. This observation suggests that cytokinin does not necessarily directly
Cytokinin inhibition of respiration in mitochondria from six plant species.
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The influence of 6-benzylaminopurine (BAP) on the respiration by mitochondria from bush bean (Phaseolus vulgaris L.), mung bean (P. aureus Roxburgh), soybean [Glycine max (L.) Merrill], maize (Zea mays L.), pea (Pisum sativum L.), and wheat (Triticum aestivum L.) was examined. BAP, a synthetic
Purification of Leucine tRNA Isoaccepting Species from Soybean Cotyledons: II. RPC-2 Purification, Ribosome Binding, and Cytokinin Content.
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Two of the six leucine isoaccepting tRNA species from soybean (Glycine max) cotyledons recognize U-beginning codons, and contain cytokinin moieties in their structure. These same two isoaccepting species have been shown to undergo quantitative changes in their relative amounts upon treatment with
Do some plant responses to cytokinins involve the cyanide-resistant respiratory pathway?
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A disengagement of the cyanide-resistant, alternative respiratory pathway in soybean (Glycine max (L.) Merr.) callus tissue was observed prior to the start of deoxyisoflavone production stimulated by addition of the cytokinin benzyladenine. To test whether this loss of alternativepathway activity
Cytokinin antagonist activity of substituted phenethylamines in plant cell culture.
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A series of structurally related substituted phenethylamines shows extreme toxicity toward wild-type callus tissue cultures of tobacco (Nicotiana tabacum), soybean (Glycine max), corn (Zea mays), and sunflower (Helianthus annuus L.), but tobacco crown gall cultures are resistant to the compounds.
Changes in the pattern of phospholipid synthesis during the induction by cytokinin of cell division in soybean suspension cultures.
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A method is described for preparing fully viable, cytokinin-starved soybean (Glycine max (L.) Merr. cv. Acme) cells from a suspension-culture of callus tissue. The cells respond to kinetin treatment by re-initiating cell division. We present evidence, from the pattern of incorporation of
Effects of cytokinins on the respiration of soybean callus tissue.
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A technique which incorporates a brief blending step to disperse callus tissue into small clumps of cells was developed, and the effects of cytokinins on respiration of soybean (Glycine max [L.] Merrill var. Acme) callus tissue prepared in this way were studied. Adenine alone did not affect
Search for nodulation-related CLE genes in the genome of Glycine max.
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CLE peptides are potentially involved in nodule organ development and in the autoregulation of nodulation (AON), a systemic process that restricts nodule number. A genome-wide survey of CLE peptide genes in the soybean glycine max genome resulted in the identification of 39 GmCLE genes, the majority
The Physiological Basis for Cytokinin Induced Increases in Pod Set in IX93-100 Soybeans.
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Previous investigations have shown the feasibility of increasing pod number on legumes by the application of 6-benzylaminopurine (BA) directly to the raceme. These investigations were designed to determine what reproductive parameter was affected by cytokinin application, and if these applications
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