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Abstract:

Asr1 and Asr2 are water stress-inducible genes belonging to the Asr gene family, which transcriptionally regulate a sugar transporter gene, at least in grape. Using an in situ RNA hybridization methodology, we determined that, in basal conditions, expression of Asr2 in tomato leaves is detected in the phloem tissue, particularly in companion phloem cells. When plants are exposed to water stress, Asr2 expression is contained in companion cells but expands occasionally to mesophyll cells. In contrast, Asr1 transcript localization seems to be sparse in leaf vascular tissue under both non-stress and stress conditions. The occurrence of Asr transcripts precisely in companion cells is in accordance with the cell type specificity reported for hexose-transporter protein molecules in grape encoded by the only Asr-target gene known to date. The results are discussed in light of the reported scarcity of plasmodesmata between companion cells and the rest of leaf tissue in the family Solanaceae. © 2007 Springer Science+Business Media B.V.

Registro:

Documento: Artículo
Título:Tomato leaf spatial expression of stress-induced Asr genes
Autor:Maskin, L.; Maldonado, S.; Iusem, N.D.
Filiación:Laboratorio de Fisiología Y Biología Molecular, IFIBYNE-CONICET, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
Departamento de Biodiversidad Y Biología Experimental, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
Palabras clave:Asr genes; Companion cells; Lycopersicon esculentum; Phloem; Stress; Vascular tissue; glucose transporter; RNA; article; Asr gene; cell expansion; cell type; companion cell; gene; gene expression; gene location; gene targeting; genetic transcription; grape; in situ hybridization; mesophyll cell; nonhuman; nucleotide sequence; phloem; phloem cell; plant leaf; plasmodesma; RNA hybridization; tomato; vascular tissue; water stress; Gene Expression Regulation, Plant; Genes, Plant; Lycopersicon esculentum; Plant Leaves; Plant Proteins; Lycopersicon esculentum; Solanaceae; Vitaceae
Año:2008
Volumen:35
Número:4
Página de inicio:501
Página de fin:505
DOI: http://dx.doi.org/10.1007/s11033-007-9114-2
Título revista:Molecular Biology Reports
Título revista abreviado:Mol. Biol. Rep.
ISSN:03014851
CODEN:MLBRB
CAS:RNA, 63231-63-0; Asr1 protein, Lycopersicon esculentum; Asr2 protein, Lycopersicon esculentum; Plant Proteins
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03014851_v35_n4_p501_Maskin

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Citas:

---------- APA ----------
Maskin, L., Maldonado, S. & Iusem, N.D. (2008) . Tomato leaf spatial expression of stress-induced Asr genes. Molecular Biology Reports, 35(4), 501-505.
http://dx.doi.org/10.1007/s11033-007-9114-2
---------- CHICAGO ----------
Maskin, L., Maldonado, S., Iusem, N.D. "Tomato leaf spatial expression of stress-induced Asr genes" . Molecular Biology Reports 35, no. 4 (2008) : 501-505.
http://dx.doi.org/10.1007/s11033-007-9114-2
---------- MLA ----------
Maskin, L., Maldonado, S., Iusem, N.D. "Tomato leaf spatial expression of stress-induced Asr genes" . Molecular Biology Reports, vol. 35, no. 4, 2008, pp. 501-505.
http://dx.doi.org/10.1007/s11033-007-9114-2
---------- VANCOUVER ----------
Maskin, L., Maldonado, S., Iusem, N.D. Tomato leaf spatial expression of stress-induced Asr genes. Mol. Biol. Rep. 2008;35(4):501-505.
http://dx.doi.org/10.1007/s11033-007-9114-2