INVESTIGADORES
PONCE Nora Marta Andrea
artículos
Título:
Perennial halophyte Salicornia neei Lag.: cell wall composition and functional properties of its biopolymers
Autor/es:
VILLARREAL, MATIAS R.; NAVARRO, DIEGO A.; M. A. PONCE, NORA; ROJAS, ANA M.; STORTZ, CARLOS A.
Revista:
FOOD CHEMISTRY
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2020
ISSN:
0308-8146
Resumen:
Salicornia neei halophyte extends in Argentina seashores. To envisage potential applications, cell wall sequential extraction performed on dry plant yielded 1.1, 2.4, 0.3and 0.9% of pectin fractions respectively extracted by room temperature water, 90ºC water, CDTA and Na2CO3. They contained 21-33% uronic acids (UA) with low degreeof methylation and 0.5-1.2 molar ratios of neutral sugars to UA. High arabinose levelsuggests that long arabinan side-chains maintain cell wall flexibility in water deficit.Fractions also contained 10-36% of proteins. The KOH-soluble fractions (4.3%) weremainly arabinoxylans. At 2.0% w/v, pectin fractions developed “weak gel”-typenetworks with Ca2+, while arabinoxylans generated “dilute solutions”. Cellulose (28%)and lignin (45.1%) were the main biopolymers in the final residue, which showed lowwater swelling capacity (3.6 mL/g) due to lignin, increasing when arabinoxylans werealso present. Phenolics (9.8%) were mainly water-extractable. Salicornia is a source ofbiopolymers and antioxidants potentially useful for food applications.