Articles
EFFECT OF SUNLIGHT ON CHEMICAL COMPOSITION OF ‘PLAK MAI LAI’ PAPAYA FRUIT DURING DEVELOPMENT
Article number
1022_11
Pages
91 – 96
Language
English
Abstract
Plak Mai Lai papaya was introduced into Thailand since 2000. The fruit is sweet and firm with thick orange-red flesh which makes it more popular for local consumption.
However, the study of fruit quality and chemical composition during fruit growth and development is limited.
This research was aimed to study the chemical composition between the shade and the light exposed side of Plak Mai Lai papaya fruit during fruit development from January to May 2009. The results showed that total soluble solids content (SSC) of papaya fruit reached the minimum requirement of 11% at the colour break stage, 1.4% skin yellowing at 133 days after anthesis (DAA), then continuously increased during fruit development and parallel with dry matter.
Vitamin C content was low during 91 to 133 DAA, 21.2 to
36.9 mg/100 ml, respectively, then increased and reached the peak at 161 DAA,
77.8 mg/100 ml.
Sunlight had no effect on SSC, dry matter and vitamin C contents.
However, study of pigment composition of the flesh showed that lycopene and
β-carotene contents of the shady side were higher than those of the light exposed side.
Lycopene content continuously increased during 112 to 161 DAP and was higher than β-carotene content which started increasing from 126 to 161 DAP.
However, the study of fruit quality and chemical composition during fruit growth and development is limited.
This research was aimed to study the chemical composition between the shade and the light exposed side of Plak Mai Lai papaya fruit during fruit development from January to May 2009. The results showed that total soluble solids content (SSC) of papaya fruit reached the minimum requirement of 11% at the colour break stage, 1.4% skin yellowing at 133 days after anthesis (DAA), then continuously increased during fruit development and parallel with dry matter.
Vitamin C content was low during 91 to 133 DAA, 21.2 to
36.9 mg/100 ml, respectively, then increased and reached the peak at 161 DAA,
77.8 mg/100 ml.
Sunlight had no effect on SSC, dry matter and vitamin C contents.
However, study of pigment composition of the flesh showed that lycopene and
β-carotene contents of the shady side were higher than those of the light exposed side.
Lycopene content continuously increased during 112 to 161 DAP and was higher than β-carotene content which started increasing from 126 to 161 DAP.
Publication
Authors
P. Sangwanangkul
Keywords
Carica papaya, day after anthesis, total soluble solids content, lycopene, β-carotene
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