Regional and cell-specific gene expression patterns during petal development
We investigated gene expression patterns that occur during tobacco petal development. Two petal mRNA classes were identified that are present at elevated levels relative to other organs. One class is represented equally in the unpigmented tube and pigmented limb regions of the corolla. The other cla...
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Published in: | The Plant cell Vol. 4; no. 11; pp. 1383 - 1404 |
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Main Authors: | , , , |
Format: | Journal Article |
Language: | English |
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Rockville, MD
American Society of Plant Physiologists
01-11-1992
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Abstract | We investigated gene expression patterns that occur during tobacco petal development. Two petal mRNA classes were identified that are present at elevated levels relative to other organs. One class is represented equally in the unpigmented tube and pigmented limb regions of the corolla. The other class accumulates preferentially within the limb region. Limb-specific mRNAs accumulate at different times during corolla development, peak in prevalence prior to flower opening, and are localized in either the epidermal cell layers or the mesophyll. The epidermal- and mesophyll-specific mRNAs change abruptly in concentration within a narrow zone of the limb/tube border. Preferential accumulation of at least one limb-specific mRNA occurs within the corolla upper region early in development prior to limb maturation and pigment accumulation. Limb-specific mRNAs also accumulate preferentially within the unpigmented corolla limb region of Nicotiana sylvestris, a diploid progenitor of tobacco. Runoff transcription studies and experiments with chimeric beta-glucuronidase genes showed that petal gene organ, cell, and region specificities are controlled primarily at the transcriptional level. We conclude that during corolla development transcriptional processes act coordinately on limb-specific genes to regulate their regional expression patterns, but act individually on these genes to define their cell specificities. |
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AbstractList | We investigated gene expression patterns that occur during tobacco petal development. Two petal mRNA classes were identified that are present at elevated levels relative to other organs. One class is represented equally in the unpigmented tube and pigmented limb regions of the corolla. The other class accumulates preferentially within the limb region. Limb-specific mRNAs accumulate at different times during corolla development, peak in prevalence prior to flower opening, and are localized in either the epidermal cell layers or the mesophyll. The epidermal- and mesophyll-specific mRNAs change abruptly in concentration within a narrow zone of the limb/tube border. Preferential accumulation of at least one limb-specific mRNA occurs within the corolla upper region early in development prior to limb maturation and pigment accumulation. Limb-specific mRNAs also accumulate preferentially within the unpigmented corolla limb region of Nicotiana sylvestris, a diploid progenitor of tobacco. Runoff transcription studies and experiments with chimeric β-glucuronidase genes showed that petal gene organ, cell, and region specificities are controlled primarily at the transcriptional level. We conclude that during corolla development transcriptional processes act coordinately on limb-specific genes to regulate their regional expression patterns, but act individually on these genes to define their cell specificities. We investigated gene expression patterns that occur during tobacco petal development. Two petal mRNA classes were identified that are present at elevated levels relative to other organs. One class is represented equally in the unpigmented tube and pigmented limb regions of the corolla. The other class accumulates preferentially within the limb region. Limb-specific mRNAs accumulate at different times during corolla development, peak in prevalence prior to flower opening, and are localized in either the epidermal cell layers or the mesophyll. The epidermal- and mesophyll-specific mRNAs change abruptly in concentration within a narrow zone of the limb/tube border. Preferential accumulation of at least one limb-specific mRNA occurs within the corolla upper region early in development prior to limb maturation and pigment accumulation. Limb-specific mRNAs also accumulate preferentially within the unpigmented corolla limb region of Nicotiana sylvestris, a diploid progenitor of tobacco. Runoff transcription studies and experiments with chimeric beta-glucuronidase genes showed that petal gene organ, cell, and region specificities are controlled primarily at the transcriptional level. We conclude that during corolla development transcriptional processes act coordinately on limb-specific genes to regulate their regional expression patterns, but act individually on these genes to define their cell specificities. |
Author | Bui A.Q Beals T.P Drews G.N Goldberg R.B |
AuthorAffiliation | Department of Biology, University of California, Los Angeles 90024-1606 |
AuthorAffiliation_xml | – name: Department of Biology, University of California, Los Angeles 90024-1606 |
Author_xml | – sequence: 1 givenname: Gary N. surname: Drews fullname: Drews, Gary N. – sequence: 2 givenname: Thomas P. surname: Beals fullname: Beals, Thomas P. – sequence: 3 givenname: Anhthu Q. surname: Bui fullname: Bui, Anhthu Q. – sequence: 4 givenname: Robert B. surname: Goldberg fullname: Goldberg, Robert B. |
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ContentType | Journal Article |
Copyright | Copyright 1992 American Society of Plant Physiologists 1993 INIST-CNRS |
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CorporateAuthor | University of Utah, Salt Lake City, UT |
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Keywords | Flower Gene expression Nicotiana tabacum Pigmentation Regulation(control) Specificity Gene Dicotyledones Angiospermae Development Spermatophyta Solanaceae Localization Cell Histochemistry |
Language | English |
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PublicationTitle | The Plant cell |
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Snippet | We investigated gene expression patterns that occur during tobacco petal development. Two petal mRNA classes were identified that are present at elevated... |
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SubjectTerms | arn mensajero arn messager Biological and medical sciences cell differentiation Chalconoids Color corola Corolla corolle Developmental biology diferenciacion celular differenciation cellulaire Epidermal cells expresion genica expression des genes Flavonoids - metabolism floracion floraison flowering Fundamental and applied biological sciences. Psychology Gels Gene Expression Gene Expression Regulation Gene Library Genes Genes, Plant - genetics genetica genetics genetique Glucuronidase - biosynthesis Glucuronidase - genetics In Situ Hybridization Messenger RNA Molecular and cellular biology Molecular genetics Morphogenesis - genetics nicotiana Nicotiana - anatomy & histology Nicotiana - genetics nicotiana tabacum Organ Specificity Oxidoreductases - genetics Oxidoreductases Acting on CH-CH Group Donors Petals Plant cells Plants, Toxic Recombinant Fusion Proteins - biosynthesis RNA, Messenger - analysis Time Factors Tissue Distribution Transcription, Genetic |
Title | Regional and cell-specific gene expression patterns during petal development |
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