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Abstract:

Snakin-1 (SN1) is an antimicrobial cysteine-rich peptide isolated from potato (Solanum tuberosum) that was classified as a member of the Snakin/Gibberellic Acid Stimulated in Arabidopsis protein family. In this work, a transgenic approach was used to study the role of SN1 in planta. Even when overexpressing SN1, potato lines did not show remarkable morphological differences from the wild type; SN1 silencing resulted in reduced height, which was accompanied by an overall reduction in leaf size and severe alterations of leaf shape. Analysis of the adaxial epidermis of mature leaves revealed that silenced lines had 70% to 90% increases in mean cell size with respect to wild-type leaves. Consequently, the number of epidermal cells was significantly reduced in these lines. Confocal microscopy analysis after agroinfiltration of Nicotiana benthamiana leaves showed that SN1-green fluorescent protein fusion protein was localized in plasma membrane, and bimolecular fluorescence complementation assays revealed that SN1 self-interacted in vivo. We further focused our study on leaf metabolism by applying a combination of gas chromatography coupled to mass spectrometry, Fourier transform infrared spectroscopy, and spectrophotometric techniques. These targeted analyses allowed a detailed examination of the changes occurring in 46 intermediate compounds from primary metabolic pathways and in seven cell wall constituents. We demonstrated that SN1 silencing affects cell division, leaf primary metabolism, and cell wall composition in potato plants, suggesting that SN1 has additional roles in growth and development beyond its previously assigned role in plant defense. © 2011 American Society of Plant Biologists. All Rights Reserved.

Registro:

Documento: Artículo
Título:Potato Snakin-1 gene silencing affects cell division, primary metabolism, and cell wall composition
Autor:Nahirñak, V.; Almasia, N.I.; Fernandez, P.V.; Hopp, H.E.; Estevez, J.M.; Carrari, F.; Vazquez-Rovere, C.
Filiación:Instituto de Biotecnología, Centro de Investigación en Ciencias Veterinarias y Agronómicas, Centro Nacional de Investigaciones Agropecuarias, Instituto Nacional de Tecnologia Agropecuaria, Repetto y De Los Reseros s/n, CP 1686, Hurlingham, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, C1033AAJ Buenos Aires, Argentina
Cátedra de Química de Biomoléculas, Departamento de Biología Aplicada y Alimentos, Facultad de Agronomía, Universidad de Buenos Aires, CP C1417DSE, Buenos Aires, Argentina
Instituto de Fisiología, Biología Molecular y Neurociencias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, CP 1428, Buenos Aires, Argentina
Palabras clave:green fluorescent protein; SN1 protein, Solanum tuberosum; vegetable protein; article; cell division; cell membrane; cell wall; chemistry; cytology; gene expression regulation; gene silencing; genetics; infrared spectroscopy; mass fragmentography; metabolism; molecular genetics; nucleotide sequence; physiology; plant epidermis; plant leaf; potato; Solanaceae; transgenic plant; Cell Division; Cell Membrane; Cell Wall; Gas Chromatography-Mass Spectrometry; Gene Expression Regulation, Plant; Gene Silencing; Green Fluorescent Proteins; Molecular Sequence Data; Plant Epidermis; Plant Leaves; Plant Proteins; Plants, Genetically Modified; Solanaceae; Solanum tuberosum; Spectroscopy, Fourier Transform Infrared; Arabidopsis; Nicotiana benthamiana; Solanum tuberosum
Año:2012
Volumen:158
Número:1
Página de inicio:252
Página de fin:263
DOI: http://dx.doi.org/10.1104/pp.111.186544
Título revista:Plant Physiology
Título revista abreviado:Plant Physiol.
ISSN:00320889
CODEN:PLPHA
CAS:Green Fluorescent Proteins, 147336-22-9; Plant Proteins; SN1 protein, Solanum tuberosum
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00320889_v158_n1_p252_Nahirnak.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00320889_v158_n1_p252_Nahirnak

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Citas:

---------- APA ----------
Nahirñak, V., Almasia, N.I., Fernandez, P.V., Hopp, H.E., Estevez, J.M., Carrari, F. & Vazquez-Rovere, C. (2012) . Potato Snakin-1 gene silencing affects cell division, primary metabolism, and cell wall composition. Plant Physiology, 158(1), 252-263.
http://dx.doi.org/10.1104/pp.111.186544
---------- CHICAGO ----------
Nahirñak, V., Almasia, N.I., Fernandez, P.V., Hopp, H.E., Estevez, J.M., Carrari, F., et al. "Potato Snakin-1 gene silencing affects cell division, primary metabolism, and cell wall composition" . Plant Physiology 158, no. 1 (2012) : 252-263.
http://dx.doi.org/10.1104/pp.111.186544
---------- MLA ----------
Nahirñak, V., Almasia, N.I., Fernandez, P.V., Hopp, H.E., Estevez, J.M., Carrari, F., et al. "Potato Snakin-1 gene silencing affects cell division, primary metabolism, and cell wall composition" . Plant Physiology, vol. 158, no. 1, 2012, pp. 252-263.
http://dx.doi.org/10.1104/pp.111.186544
---------- VANCOUVER ----------
Nahirñak, V., Almasia, N.I., Fernandez, P.V., Hopp, H.E., Estevez, J.M., Carrari, F., et al. Potato Snakin-1 gene silencing affects cell division, primary metabolism, and cell wall composition. Plant Physiol. 2012;158(1):252-263.
http://dx.doi.org/10.1104/pp.111.186544