Effect of irrigation level on yield and bioactive amine content of American lettuce


Autoria(s): Coelho, AFS; Gomes, E. P.; Sousa, A. D.; Gloria, M. B.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

30/04/2005

Resumo

The influence of four levels (25, 50, 75 and 100%) of Class A pan evaporation replenishment (PER) on the marketable yield and bioactive amine content of American lettuce (Lactuca sativa cv Lucy Brown) grown under greenhouse conditions and drip irrigation was investigated. Lettuce was planted in 1.20 m x 2.10 m plots in a completely randomised block design with three replications. Lowest fresh head weights and diameters were obtained at 25% PER. Highest marketable yields and fresh head weights were obtained at 100% PER; however, no significant difference was observed when using 75% PER. The fresh head diameter was smaller only when using 25% PER. Four amines were detected in lettuce grown under 100% PER, with a total content of 7.60 mg kg(-1). Spermidine was the prevalent amine, followed by putrescine, cadaverine and agmatine. Higher spermidine and cadaverine levels were observed in the outer layers of leaves than in the intermediate and inner leaves. The contents of every amine except agmatine increased with water stress; however, a significant difference was observed only between 100 and 25% PER. The concentrations of accumulated putrescine were not capable of negatively affecting the sensory quality of the lettuce. (c) 2005 Society of Chemical Industry.

Formato

1026-1032

Identificador

http://dx.doi.org/10.1002/jsfa.2064

Journal of the Science of Food and Agriculture. Chichester: John Wiley & Sons Ltd, v. 85, n. 6, p. 1026-1032, 2005.

0022-5142

http://hdl.handle.net/11449/36552

10.1002/jsfa.2064

WOS:000228405900021

Idioma(s)

eng

Publicador

Wiley-Blackwell

Relação

Journal of the Science of Food and Agriculture

Direitos

closedAccess

Palavras-Chave #bioactive amines #Lactuca sativa L #irrigation #water stress
Tipo

info:eu-repo/semantics/article