Pistil-specific and ethylene-regulated expression of 1-aminocyclopropane-1-carboxylate oxidase genes in petunia flowers

Pistil-specific and ethylene-regulated expression of 1-aminocyclopropane-1-carboxylate oxidase genes in petunia flowers

The differential expression of the petunia 1-aminocyclopropane-1-carboxylate (ACC) oxidase gene family during flower development and senescence was investigated. ACC oxidase catalyzes the conversion of ACC to ethylene. The increase in ethylene production by petunia corollas during senescence was pre...

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Bibliographic Details
Published in:The Plant cell Vol. 6; no. 9; pp. 1227 - 1239
Main Authors: Tang, X, Gomes, A.M.T.R, Bhatia, A, Woodson, W.R
Format: Journal Article
Language:English
Published: United States American Society of Plant Physiologists 01-09-1994
Subjects:
ARN MENSAJERO
ARN MESSAGER
AVEJENTAMIENTO
Cellular senescence
COROLA
Corolla
COROLLE
ETHYLENE
Ethylene production
ETILENO
EXPRESION GENICA
EXPRESSION DES GENES
Flowering
GENE
Gene expression regulation
GENES
GENETICA
GENETIQUE
GINECEO
GYNECEE
Messenger RNA
Oxidases
OXIDORREDUCTASAS
OXYDOREDUCTASE
PETUNIA
Petunia hybrida
Plants
PRODUCCION DE ETILENO
PRODUCTION D'ETHYLENE
RNA
SENESCENCE
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Summary:The differential expression of the petunia 1-aminocyclopropane-1-carboxylate (ACC) oxidase gene family during flower development and senescence was investigated. ACC oxidase catalyzes the conversion of ACC to ethylene. The increase in ethylene production by petunia corollas during senescence was preceded by increased ACC oxidase mRNA and enzyme activity. Treatment of flowers with ethylene led to an increase in ethylene production, ACC oxidase mRNA, and ACC oxidase activity in corollas. in contrast, leaves did not exhibit increased ethylene production or ACC oxidase expression in response to ethylene. Gene-specific probes revealed that the AC01 gene was expressed specifically in senescing corollas and in other floral organs following exposure to ethylene. The AC03 and AC04 genes were specifically expressed in developing pistil tissue. In situ hybridization experiments revealed that ACC oxidase mRNAs were specifically localized to the secretory cells of the stigma and the connective tissue of the receptacle, including the nectaries. Treatment of flower buds with ethylene led to patterns of ACC oxidase gene expression spatially distinct from the patterns observed during development. The timing and tissue specificity of ACC oxidase expression during pistil development were paralleled by physiological processes associated with reproduction, including nectar secretion, accumulation of stigmatic exudate, and development of the self-incompatible response
Bibliography:F30
9517287
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ISSN:1040-4651
1532-298X
DOI:10.1105/tpc.6.9.1227