Chemical and biochemical changes of pumpkin (Cucumis moschata, Duch) tissue in relation to osmotic stress
Chemical and biochemical changes of pumpkin (Cucumis moschata, Duch) tissue in relation to osmotic stress were studied and related to tissue textural behavior. Turgor pressure of raw tissue was adjusted by immersion in hypotonic (0.0 mol m-3), isotonic (250 mol m-3) and plasmolyzing (1050 mol m-3) b...
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2005
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 10119caa a22008777a 4500 | ||
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| 001 | PAPER-3979 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203329.0 | ||
| 008 | 190411s2005 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-23744458550 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a JSFAA | ||
| 100 | 1 | |a De Escalada Pla, M.F. | |
| 245 | 1 | 0 | |a Chemical and biochemical changes of pumpkin (Cucumis moschata, Duch) tissue in relation to osmotic stress |
| 260 | |c 2005 | ||
| 270 | 1 | 0 | |m Gerschenson, L.N.; Departamento de Industrias, Facultad de Ciencias Exactas Y Naturales, Ciudad Universitaria, (1428) Buenos Aires, Argentina; email: lia@di.fcen.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a Chemical and biochemical changes of pumpkin (Cucumis moschata, Duch) tissue in relation to osmotic stress were studied and related to tissue textural behavior. Turgor pressure of raw tissue was adjusted by immersion in hypotonic (0.0 mol m-3), isotonic (250 mol m-3) and plasmolyzing (1050 mol m-3) buffered (20 mol m-3 potassium phosphate, pH 6.8) solutions of poly(ethylene glycol) 400 (PEG). It was found that a substantial proportion of polysaccharides located in the cell wall (CW)-middle lamellae (ML) of studied tissue was water extractable. This proportion decreased when CW-stretch increased. Ionically bound peroxidase (POX) presented an increased activity in swollen and isotonic tissue, probably associated to oxidative cross-linking of extensin located in the CW of this tissue, as a response to stress promoted by cut, immersion and turgor pressure change. The resistance of CW to elongation when equilibrated in hypotonic medium, might be ascribed to reinforcement of the CW by the oxidative cross-linking of extensin, with simultaneous formation of pectin-in-extensin entanglements. Plasmolyzed tissue where CW is relaxed, showed pectin-rhamnogalacturonan degradation. The water-soluble fraction (WSF) was shown to be a negative function of CW stretching and infinite force of relaxation. © 2005 Society of Chemical Industry. |l eng | |
| 593 | |a Departamento de Industrias, Facultad de Ciencias Exactas Y Naturales, Ciudad Universitaria, (1428) Buenos Aires, Argentina | ||
| 593 | |a Departamento de Química Orgánica - CIHIDECAR, Facultad de Ciencias Exactas Y Naturales, Ciudad Universitaria, (1428) Buenos Aires, Argentina | ||
| 593 | |a Departamento de Química Biológica, Facultad de Ciencias Exactas Y Naturales, Ciudad Universitaria, (1428) Buenos Aires, Argentina | ||
| 593 | |a National Research Council, CONICET, Argentina | ||
| 690 | 1 | 0 | |a ENZYMES |
| 690 | 1 | 0 | |a PECTINS |
| 690 | 1 | 0 | |a POLYSACCHARIDES |
| 690 | 1 | 0 | |a PUMPKIN |
| 690 | 1 | 0 | |a TURGOR PRESSURE |
| 690 | 1 | 0 | |a CUCUMIS |
| 700 | 1 | |a Ponce, N.M. | |
| 700 | 1 | |a Wider, M.E. | |
| 700 | 1 | |a Stortz, C.A. | |
| 700 | 1 | |a Rojas, A.M. | |
| 700 | 1 | |a Gerschenson, L.N. | |
| 773 | 0 | |d 2005 |g v. 85 |h pp. 1852-1860 |k n. 11 |p J. Sci. Food Agric. |x 00225142 |w (AR-BaUEN)CENRE-421 |t Journal of the Science of Food and Agriculture | |
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| 856 | 4 | 0 | |u https://doi.org/10.1002/jsfa.2187 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00225142_v85_n11_p1852_DeEscaladaPla |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00225142_v85_n11_p1852_DeEscaladaPla |y Registro en la Biblioteca Digital |
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