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ULTRASTRUCTURAL CHANGES IN CHERIMOYA FRUIT INJURED BY CHILLING

1992; Elsevier BV; Volume: 11; Issue: 4 Linguagem: Inglês

1046-705X

Margarita Gutiérrez, María del Mar Sola, Luis Alberto Malvárez Pascual, María Isabel Rodríguez‐García, Alberto M. Vargas,

Banana Cultivation and Research

Cherimoya (Annona cherimola Mill.) is an impor­ tant fruit crop that is grown in the South of Spain. Ultrastructural modifications of cherimoya fruit were studied after low-temperature storage. When cherimoya was stored at 4 oc for 6 days, the starch grains did not suffer degradation and the cell walls remained intact. The membrane systems were severely damaged , result ­ ing in a loss of cell compartmentalization. Cherimoya rewarmed to 22 oc after 9 days of low temperature stor­ age is not able to recover , showing the irreversibili ty of the ultrastructural changes. In addition, disorganization of the internal lamella of chloroplasts , grana unstacking, as well as a general swellin g of plastids and mitochon­ dria were also observed. The ultrastructural damage observed is explained in terms of membrane disruption.