Carotenoids, chlorophylls and pectins during ripening of guava (Psidium guajava L.) from Santander, Colombia

We evaluated the contents of carotenoids, chlorophyll and pectin in guava fruit, Psidium guajava L., in three locations (Barbosa, Puente Nacional, and Velez) in Santander Department, Colombia in four varieties (Regional Blanca, Raquira Blanca, Guavata Victoria, Regional Roja) for four stages of matu...

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Detalhes bibliográficos
Principais autores: Guavita-Vargas, Jacqueline, Avellaneda-Torres, Lizeth M., Solarte, María Elena, Melgarejo, Luz Marina
Formato: Online
Idioma:spa
Publicado em: Sociedad Colombiana de Ciencias Hortícolas-SCCH and Universidad Pedagógica y Tecnológica de Colombia-UPTC 2018
Assuntos:
Acesso em linha:https://revistas.uptc.edu.co/index.php/ciencias_horticolas/article/view/7713
Descrição
Resumo:We evaluated the contents of carotenoids, chlorophyll and pectin in guava fruit, Psidium guajava L., in three locations (Barbosa, Puente Nacional, and Velez) in Santander Department, Colombia in four varieties (Regional Blanca, Raquira Blanca, Guavata Victoria, Regional Roja) for four stages of maturity (green, physiological maturity, semi- ripe, ripe). The total carotenoids and chlorophyll were determined with spectrophotometry, differentiating the endocarp, exocarp and pectins using the gravimetric method. The results were statistically significant (P≤0.05), obtaining the highest contents of carotenoids in the variety Regional Roja (166.3 mg/100 g, semi-rate state in Barbosa), the highest chlorophyll in Guavata Victoria (39.87 mg/100 g, green state in Vélez) and the highest pectins in Regional Blanca (1.79%p/p, physiological maturity state, in Puente Nacional). The white fleshed varieties (Regional Blanca, Raquira Blanca and Guavata Victoria) had higher contents of carotenoids in the exocarp (11.19 mg/100 g), unlike the Regional Roja variety, which had a high content in the endocarp (13.06 mg/100 g). The principal component analysis (PCA) and cluster analysis showed a direct relationship between the carotenoids, chlorophyll and pectin in white-fleshed varieties, in contrast to in the inverse relationship found in the Regional Roja variety.