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Capron D, Mouzeyar S, Boulaflous A, Girousse C, Rustenholz C, Laugier C, Paux E, Bouzidi MF. Transcriptional profile analysis of E3 ligase and hormone-related genes expressed during wheat grain development. BMC PLANT BIOLOGY 2012; 12:35. [PMID: 22416807 PMCID: PMC3405487 DOI: 10.1186/1471-2229-12-35] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 03/14/2012] [Indexed: 05/23/2023]
Abstract
BACKGROUND Wheat grains are an important source of food, stock feed and raw materials for industry, but current production levels cannot meet world needs. Elucidation of the molecular mechanisms underlying wheat grain development will contribute valuable information to improving wheat cultivation. One of the most important mechanisms implicated in plant developmental processes is the ubiquitin-proteasome system (UPS). Among the different roles of the UPS, it is clear that it is essential to hormone signaling. In particular, E3 ubiquitin ligases of the UPS have been shown to play critical roles in hormone perception and signal transduction. RESULTS A NimbleGen microarray containing 39,179 UniGenes was used to study the kinetics of gene expression during wheat grain development from the early stages of cell division to the mid-grain filling stage. By comparing 11 consecutive time-points, 9284 differentially expressed genes were identified and annotated during this study. A comparison of the temporal profiles of these genes revealed dynamic transcript accumulation profiles with major reprogramming events that occurred during the time intervals of 80-120 and 220-240°Cdays. The list of the genes expressed differentially during these transitions were identified and annotated. Emphasis was placed on E3 ligase and hormone-related genes. In total, 173 E3 ligase coding genes and 126 hormone-related genes were differentially expressed during the cell division and grain filling stages, with each family displaying a different expression profile. CONCLUSIONS The differential expression of genes involved in the UPS and plant hormone pathways suggests that phytohormones and UPS crosstalk might play a critical role in the wheat grain developmental process. Some E3 ligase and hormone-related genes seem to be up- or down-regulated during the early and late stages of the grain development.
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Affiliation(s)
- Delphine Capron
- Université Blaise Pascal, UMR 1095 GDEC, 24 avenue des Landais, F-63177 Aubière, France
| | - Said Mouzeyar
- Université Blaise Pascal, UMR 1095 GDEC, 24 avenue des Landais, F-63177 Aubière, France
| | - Aurélia Boulaflous
- Université Blaise Pascal, UMR 1095 GDEC, 24 avenue des Landais, F-63177 Aubière, France
| | - Christine Girousse
- INRA, UMR 1095 GDEC, 234 avenue du Brézet, F-63100 Clermont-Ferrand, France
| | - Camille Rustenholz
- INRA, UMR 1095 GDEC, 234 avenue du Brézet, F-63100 Clermont-Ferrand, France
| | - Christel Laugier
- INRA, UMR 1095 GDEC, 234 avenue du Brézet, F-63100 Clermont-Ferrand, France
| | - Etienne Paux
- INRA, UMR 1095 GDEC, 234 avenue du Brézet, F-63100 Clermont-Ferrand, France
| | - Mohamed Fouad Bouzidi
- Université Blaise Pascal, UMR 1095 GDEC, 24 avenue des Landais, F-63177 Aubière, France
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Kumar S, Ghatty S, Satyanarayana J, Guha A, Chaitanya B, Reddy AR. Paclobutrazol treatment as a potential strategy for higher seed and oil yield in field-grown Camelina sativa L. Crantz. BMC Res Notes 2012; 5:137. [PMID: 22410213 PMCID: PMC3320555 DOI: 10.1186/1756-0500-5-137] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Accepted: 03/13/2012] [Indexed: 11/15/2022] Open
Abstract
Background Camelina (Camelina sativa L. Crantz) is a non-food oilseed crop which holds promise as an alternative biofuel energy resource. Its ability to grow in a variety of climatic and soil conditions and minimal requirements of agronomical inputs than other oilseed crops makes it economically viable for advanced biofuel production. We designed a study to investigate the effect of paclobutrazol [2RS, 3RS)-1-(4-Chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol] (PBZ), a popular plant growth regulator, on the seed and oil yield of Camelina sativa (cv. Celine). Results A field-based micro-trial setup was established in a randomized block design and the study was performed twice within a span of five months (October 2010 to February 2011) and five different PBZ treatments (Control: T0; 25 mg l-1: T1; 50 mg l-1: T2; 75 mg l-1: T3; 100 mg l-1: T4; 125 mg l-1: T5) were applied (soil application) at the time of initiation of flowering. PBZ at 100 mg l-1 concentration (T4) resulted in highest seed and oil yield by 80% and 15%, respectively. The seed yield increment was mainly due to enhanced number of siliques per plant when compared to control. The PBZ - treated plants displayed better photosynthetic leaf gas exchange characteristics, higher chlorophyll contents and possessed dark green leaves which were photosynthetically active for a longer period and facilitated higher photoassimilation. Conclusion We report for the first time that application of optimized PBZ dose can be a potential strategy to achieve higher seed and oil yield from Camelina sativa that holds great promise as a biofuel crop in future.
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Affiliation(s)
- Sumit Kumar
- Department of Plant Sciences, University of Hyderabad, Hyderabad, India
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The involvement of cytokinins in a host–parasite relationship between the tomato (Lycopersicon esculentum) and a nematode (Meloidogyne javanica). Parasitology 2009. [DOI: 10.1017/s0031182000000962] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
SummaryThe influence of Meloidogyne javanica on cytokinins in the host Lycopersicon esculentum has been studied at different stages of the nematode's life-cycle. Marked differences were detected in cytokinin content of root homogenates between infected and control plants, particularly at the 3rd (32 day), 4th (39 day) and 5th (55 day) harvests. Most of the cytokinin detected appeared to be associated with root homogenates in which the nematode was in the rapid post-moult growth stage. The influence of these nematodes on cytokinins in the host's xylem exudate was not nearly so pronounced. The freshly hatched 2nd-stage infective larvae of M. javanica were themselves capable of exuding cytokinin-like substances.
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Laureys F, Smets R, Lenjou M, Van Bockstaele D, Inzé D, Van Onckelen H. A low content in zeatin type cytokinins is not restrictive for the occurrence of G1/S transition in tobacco BY-2 cells. FEBS Lett 1999; 460:123-8. [PMID: 10571073 DOI: 10.1016/s0014-5793(99)01264-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Theories on the importance of cytokinins in G1/S transition control are manifold and contradictory. By establishing a double A(phi-PZ block, maximal synchronization of a BY-2 suspension culture was obtained to investigate the effect of cytokinin depletion on G1/S transition. Lovastatin was used as a specific inhibitor of cytokinin biosynthesis. Flow cytometry showed that the G1/S transition occurred regardless of the cytokinin drop. This observation indicates an extremely low dose requiry for that stage of the cell cycle. It is very likely that precisely the downregulation of zeatin type cytokinins matters for the G1/S transition to occur, since cytokinin addition at early G1 blocked the cycle at G1/S.
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Affiliation(s)
- F Laureys
- Department of Biology, Universiteit Antwerpen, Wilrijk, Belgium
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Hernández P, Paton F, Ballesteros Y, Hernández L. Voltammetry study of zeatin in a carbon fiber ultramicroelectrode. Determination by adsorptive stripping. ELECTROANAL 1997. [DOI: 10.1002/elan.1140090309] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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6
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Hormonal Regulation of Seed Development. ADVANCES IN CELLULAR AND MOLECULAR BIOLOGY OF PLANTS 1997. [DOI: 10.1007/978-94-015-8909-3_4] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Hernández L, Hernández P, Rica M, Galán F. Determination of Zeatin in plant extracts by square wave stripping polarography and differential pulse stripping polarography. Anal Chim Acta 1995. [DOI: 10.1016/0003-2670(95)00290-g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Angra R, Mandahar CL. Pathogenesis of barley leaves by Helminthosporium teres I: Green island formation and the possible involvement of cytokinins. Mycopathologia 1991. [DOI: 10.1007/bf00436687] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Angra R, Mandahar CL, Gulati A. The possible involvement of cytokinins in the pathogenicity of Helminthosporium maydis. Mycopathologia 1990. [DOI: 10.1007/bf00436807] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Scholes JD, Farrar JF. INCREASED RATES OF PHOTOSYNTHESIS IN LOCALIZED REGIONS OF A BARLEY LEAF INFECTED WITH BROWN RUST. THE NEW PHYTOLOGIST 1986; 104:601-612. [PMID: 33873853 DOI: 10.1111/j.1469-8137.1986.tb00660.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The rate of photosynthesis was examined in whole leaves of barley infected with brown rust (Puccinia hordei Otth.) and within localized regions of the infected leaf, within brown rust pustules and in regions between them, from flecking to green island formation. In addition, oxygen evolution was measured from localized regions of a rusted leaf after feeding with inorganic phosphate (Pi) to investigate the hypothesis that fungal sequestration of Pi from the host cytoplasm may, totally or partially, be responsible for the decline in photosynthesis. The rate of net photosynthesis and the quantum yield of oxygen evolution declined in whole infected leaves as the disease progressed. However, the rate of gross photosynthesis (per unit chlorophyll) was increased in rusted leaves. Autoradiographic and oxygen evolution studies showed that the decline in net photosynthesis could be attributed largely to a reduction in the rate of photosynthesis in the regions between pustules. Within areas of the leaf invaded by the fungus, gross photosynthesis was increased in comparison to control tissue. Feeding leaf tissue with Pi did not significantly increase the rate of photosynthesis in pustules or regions between pustules, implying that Pi was not previously limiting the rate of photosynthesis. Possible mechanisms underlying the increase and decrease in photosynthesis in different regions of an infected leaf are discussed.
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Affiliation(s)
- J D Scholes
- School of Plant Biology, University College of North Wales, Bangor, Gwynedd LL57 2UW, UK
| | - J F Farrar
- School of Plant Biology, University College of North Wales, Bangor, Gwynedd LL57 2UW, UK
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The Role of Cytokinins in the Development and Metabolism of Barley Leaves III. The Effect on the RNA Metabolism in Various Cell Compartments During Senescence. ACTA ACUST UNITED AC 1981. [DOI: 10.1016/s0044-328x(81)80208-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Hochhauser SJ, Stein JL, Stein GS. Gene expression and cell cycle regulation. INTERNATIONAL REVIEW OF CYTOLOGY 1981; 71:95-243. [PMID: 6165699 DOI: 10.1016/s0074-7696(08)61183-3] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Chen CM, Melitz DK. Cytokinin biosynthesis in a cell-free system from cytokinin-autotrophic tobacco tissue cultures. FEBS Lett 1979; 107:15-20. [PMID: 499537 DOI: 10.1016/0014-5793(79)80452-4] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Miller CO. Cytokinin inhibition of respiration by cells and mitochondria of soybean, Glycine max (L.) Merrill. PLANTA 1979; 146:503-511. [PMID: 24318259 DOI: 10.1007/bf00380866] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/1979] [Accepted: 06/22/1979] [Indexed: 06/02/2023]
Abstract
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 6-benzylaminopurine (BAP) at a concentration of 0.5 mM. BAP at other concentrations either promoted or inhibited oxidation of epinephrine in precisely the pattern reported earlier for the disappearance of coumarate; therefore, the disappearance of coumarate probably involves its oxidation. The effectiveness of other cytokinins in inhibiting the oxidation was studied.At 0.5 mM, and perhaps even at 0.5 μM, some of the several cytokinins tested inhibited oxygen consumption by the soybean cells. This inhibition, which did not require any of the above metabolizable compounds, was especially marked in the presence of cyanide, azide or Antimycin A, and was detectable in 10 min or less. Either Antimycin A or salicylhydroxamic acid alone promoted O2 consumption but together they were quite inhibitory. The soybean cells apparently have an alternate respiratory pathway and cytokinins may influence its operation.Several cytokinins at 0.5 mM, and perhaps at 0.5 μM, also inhibited oxygen consumption by mitochondrial preparations from the soybean cells, the inhibition being evident in about 20 s. The consumption required a substrate such as malate, succinate or NADH. Cytokinins and related compounds varied in effectiveness as follows: BAP and 6-isopentenyla-minopurine ≥ 9-tetrahydropyranyl-BAP > kinetin, ribosyl-isopentenylaminopurine, 9-methyl-BAP and 9-methoxymethyl-BAP > 6,6-dimethylaminopurine and zeatin (slight activity) > 6-methylaminopurine, nicotinamide and adenine (ineffective). To a great extent this order parallels the order of effectiveness of the compounds in causing cell division. Mitochondria, therefore, may contain a site for an important cytokinin action.
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Affiliation(s)
- C O Miller
- Department of Biology, Indiana University, 47401, Bloomington, IN, USA
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Holland J, McKerrell E, Fuell K, Burrows W. Separation of cytokinins by reversed-phase high-performance liquid chromatography. J Chromatogr A 1978. [DOI: 10.1016/s0021-9673(00)95639-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Goh C, Yang A. Effects of growth regulators and decapitation on flowering of Dendrobium orchid hybrids. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/0304-4211(78)90080-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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de Boer J, Feierabend J. Comparative analysis of the action of cytokinin and light on the growth of rye leaves. PLANTA 1978; 142:67-73. [PMID: 24408000 DOI: 10.1007/bf00385122] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/1978] [Accepted: 05/11/1978] [Indexed: 06/03/2023]
Abstract
In etiolated rye seedlings (Secale cereale L.) the cytokinin supply controls leaf growth. Dry weight and total amino-nitrogen, protein, total nucleic acid, DNA, and rRNA levels were similarly lowered in leaves depleted of their endogenous cytokinin supply by early excision of the seedling roots and increased by 70-100% after the addition of kinetin. The proportion of cytoplasmic ribosomes bound as polyribosomes was only slightly increased from 40% in cytokinin-deficient to 50% in kinetin-treated darkgrown leaves. White light increased the polyribosome proportion to 61%. In cytokinin-supplied leaves uptake and accumulation of L-[(3)H]leucine were greater than in cytokinin-deficient leaves. Under all conditions of cytokinin supply the same proportion of the total amino nitrogen content (80%) was present as protein nitrogen and virtually, the same percentage (60%) of the total uptake of L-[(3)H]leucine was incorporated into protein in dark-grown leaves. In light, significantly higher proportions of the amino nitrogen content and of the L-[(3)H]leucine uptake were incorporated into protein. The results suggest that the accumulation of substrate is a main cytokinin-controlled step determining the growth of the leaves.
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Affiliation(s)
- J de Boer
- Arbeitsgruppe Pflanzliche Zellphysiologie, Ruhr-Universität Bochum, Postfach 102148, D-4630, Bochum, Federal Republic of Germany
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Sossinka J, Feierabend J. Influence of Cytokinin and Light on Nucleic Acid and Protein Metabolism of Senescing Coleoptiles. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/s0015-3796(17)30529-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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The Physiology of Roots. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/b978-0-444-41638-4.50008-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Fosket DE, Tepfer DA. Hormonal regulation of growth in cultured plant cells. IN VITRO 1978; 14:63-75. [PMID: 624559 DOI: 10.1007/bf02618175] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Cytokinins: Production and Biogenesis of N6-(◿2-isopentenyl) Adenine in Cultures of Agrobacterium tumefaciens Strain B6. ACTA ACUST UNITED AC 1976. [DOI: 10.1016/s0044-328x(76)80124-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Konyshev VA. Chemical nature and systematization of substances regulating animal tissue growth. INTERNATIONAL REVIEW OF CYTOLOGY 1976; 47:195-224. [PMID: 136426 DOI: 10.1016/s0074-7696(08)60089-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Reda F. Endogenous cytokinins in vernalized winter wheat grains. PLANTA 1976; 130:265-268. [PMID: 24424638 DOI: 10.1007/bf00387831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/1975] [Accepted: 02/09/1976] [Indexed: 06/03/2023]
Abstract
The soybean callus assay was used to study the effect of vernalization on the endogenous cytokinin levels of the grains of winter wheat (Triticum vulgare L.), cv. Ferto and Fema. Vernalization of the grains was carried out at 3° C in the dark for 0, 9, 18, 27, 36 and 45 days. Cytokinin activities could be detected in both the aqueous and butanol extracts of vernalized grains of both cultivars. It is suggested that flowering of winter wheat may involve changes in the levels of endogenous cytokinins during vernalization.
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Affiliation(s)
- F Reda
- Botany Laboratory, National Research Centre, Dokki, Cairo, Egypt
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Davey JE, van Staden J. Cytokinin translocation: Changes in zeatin and zeatin-riboside levels in the root exudate of tomato plants during their development. PLANTA 1976; 130:69-72. [PMID: 24424544 DOI: 10.1007/bf00390846] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/1975] [Accepted: 01/07/1976] [Indexed: 06/03/2023]
Abstract
The zeatin and zeatin riboside content of tomato (Lycopersicon esculentum Mill.) root exudates were determined at different stages of development. Zeatin riboside was found to be the major translocational form of cytokinin in the xylem during early vegetative growth. During flower bud formation this cytokinin decreased markedly in concentration so that, at anthesis, there was no appreciable difference in the zeatin and zeatin riboside concentration in the root exudate.
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Affiliation(s)
- J E Davey
- Department of Botany, University of Natal, Pietermaritzburg, South Africa
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Chen C, Smith OC, McChesney J. Biosynthesis and cytokinin activity of 8-hydroxy and 2,8-dihydroxy derivatives of zeatin and N-6(increment-2-isopentenyl)adenine. Biochemistry 1975; 14:3088-93. [PMID: 1148191 DOI: 10.1021/bi00685a008] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
8-Hydroxy and 2,8-dihydroxy derivatives of the cytokinins, 6-(4-hydroxy-3-methyl-trans-2-butenylamino)purine and N-6-(increment -2-isopentenyl)adenine, have been biosynthesized by xanthine oxidase oxidation. 8-Hydroxy derivatives have been shown to be the major intermdeiates. These compounds were tested for cytokinin activity in the tobacco bioassay. The results suggest that substitution of the 8 position with a hydroxyl group causes less decrease of cytokinin activity than substitution of both the 2 and 8 positions with hydroxyl groups.
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Lorenzi R, Horgan R, Wareing P. Cytokinins in Picea sitchensis Carriere: Identification and Relation to Growth. ACTA ACUST UNITED AC 1975. [DOI: 10.1016/s0015-3796(17)30130-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Chen CM, Hartnell GF, Smith OC, Francis WS. Quantitative measurement of hypermodified adenosine ribonucleosides in plant tissues. Anal Biochem 1974; 60:441-8. [PMID: 4367535 DOI: 10.1016/0003-2697(74)90253-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Hahn H, de Zacks R, Kende H. Cytokinin formation in pea seeds. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 1974; 61:170. [PMID: 4833620 DOI: 10.1007/bf00602596] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Railton ID. Effects of N(6)-benzyladenine on the rate of turnover of [(3)H]GA 20 by shoots of dwarf Pisum sativum. PLANTA 1974; 120:197-200. [PMID: 24442659 DOI: 10.1007/bf00384930] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/1974] [Indexed: 06/03/2023]
Abstract
Application of the cytokinin, N(6)-benzyladenine, to light-grown shoots of dwarf "Meteor" pea seedlings (Pisum sativum L.) markedly increased the rate of turnover of GA20, a native pea gibberellin. It is suggested that endogenous cytokinins may affect gibberellin metabolism in plants by controlling rates of gibberellin turnover.
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Affiliation(s)
- I D Railton
- Department of Botany, The University, G12 8QQ, Glasgow, U.K
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LEONARD NELSONJ. Chemistry of the Cytokinins. ACTA ACUST UNITED AC 1974. [DOI: 10.1016/b978-0-12-612407-1.50008-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Beever JE, Woolhouse HW. Increased cytokinin from root system of Perilla frutescens and flower and fruit development. NATURE: NEW BIOLOGY 1973; 246:31-2. [PMID: 4519023 DOI: 10.1038/newbio246031a0] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Hewett EW, Wareing PF. Cytokinins in Populus x robusta Schneid: A complex in leaves. PLANTA 1973; 112:225-233. [PMID: 24468731 DOI: 10.1007/bf00385326] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/1973] [Indexed: 06/03/2023]
Abstract
At least seven cytokinins have been detected in mature leaves of Populus x robusta Schneid after chromatography on Sephadex LH-20. Two of these have similar elution volumes to zeatin and zeatin riboside. A third appears to be a cytokinin glucoside. A fourth is a new, unidentified cytokinin, susceptible to mild oxidation, and yielding two cytokinin active products after acid hydrolysis. This cytokinin complex has been found in fully expanded leaves, a tissue in which cell division is completed.
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Affiliation(s)
- E W Hewett
- Department of Botany and Microbiology, University College of Wales, SY23 3DA, Aberystwyth, UK
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