ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Comparison of changes in sugars and ethylene production of cherimoya fruit grown at different seasons.

Nomura, K.; Terai, H.; Yabe, K.; Maeda, M.; Rahman, M. S. M.; Yoshida, M.; Yonemoto, J. Y.;

Journal of Horticultural Science Year: 1997 Vol: 72 Issue: 4 Pages: 617-622 Ref: 16 ref.

1997

บทคัดย่อ

Changes in fruit weight, total soluble solids (TSS), sugar content and postharvest ethylene production during fruit development were compared in fruits of cherimoya cv. Big Sister pollinated at different times (early, at the beginning of April 1995 or late, at the end of May 1994). Fruit weight increased by growth, independently of pollination date. Changes in TSS and sugar content were strongly affected by pollination date. In late pollinated fruits, both TSS and sugar content increased during the growth period, 110-160 days after pollination, while neither increased with fruit growth in early pollinated fruits. Moreover, changes in TSS and sugar content after ripening depended not only on pollination date but also on the growth period. With late pollination, fruit harvested after 140 days became edible after ripening. The TSS and total sugar contents increased to about 20 deg Brix and above 16%, respectively. But early pollinated fruits were not edible after ripening, since total sugar content

 increased only to about 7%, even though they kept growing for 160 days on the tree. The maximum rate of ethylene production declined and the number of days to the ethylene peak from harvest was also reduced with growth in both cases. These changes were closely correlated with days after pollination regardless of pollination date. Comparisons of accumulated temperature suggest that temperature at pollination and during the resting period of growth affected fruit development. These results indicate that neither fruit weight nor number of days after pollination is a suitable index for harvesting date.