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Polygalacturonase and pectin methylesterase activities of CaCl2 treated red-fleshed dragon fruit (Hylocereus polyrhizus) harvested at different maturity

Fruits harvested at different maturity possess different biochemical constituents and physiological properties that make the fruits may react somewhat differently to the postharvest treatment. A study to examine the activity of Polygalacturonase (PG) and Pectin Methylesterase (PME) enzymes during st...

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Main Authors: Awang, Yahya, Chuni, Siti Hajar, Tengku Muda Mohamed, Mahmud, Yahya, Hafiza, Mohamad, Rosli
Format: Article
Language:English
Published: Science Publications 2013
Online Access:http://psasir.upm.edu.my/id/eprint/29400/1/ajabssp.2013.167.172.pdf
http://psasir.upm.edu.my/id/eprint/29400/
http://thescipub.com/abstract/10.3844/ajabssp.2013.167.172
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spelling my.upm.eprints.294002016-07-12T09:29:30Z http://psasir.upm.edu.my/id/eprint/29400/ Polygalacturonase and pectin methylesterase activities of CaCl2 treated red-fleshed dragon fruit (Hylocereus polyrhizus) harvested at different maturity Awang, Yahya Chuni, Siti Hajar Tengku Muda Mohamed, Mahmud Yahya, Hafiza Mohamad, Rosli Fruits harvested at different maturity possess different biochemical constituents and physiological properties that make the fruits may react somewhat differently to the postharvest treatment. A study to examine the activity of Polygalacturonase (PG) and Pectin Methylesterase (PME) enzymes during storage in dragon fruit (Hylocereus polyrhizus) harvested at 28 days (Index 3) and 34 days (Index 5) after anthesis and postharvest treated with 0, 2.5, 5.0 and 7.5 g L-1 CaCl2 was performed. The PG activity was lower in younger fruit and vice-versa for PME activity. Increasing concentration of CaCl2 effectively reduced the activity of both enzymes. PG activity for fruit treated with 0, 5 and 7.5 g L-1 CaCl2 increased linearly with the time of storage while its activity for the fruit treated with 2.5 g L-1 CaCl2 was lower at the beginning of storage. PG activity of Index 5 fruits increased almost linearly during storage while its activity in Index 3 fruits was low at the early days of storage and later continued to increase until day seven. At both maturity indices, the PME activity was low at the early days of storage and later continued to increase until day seven. Overall, results obtained indicated that CaCl2 postharvest treatment reduced both PME and PG activities thus slowing down the softening process giving an evident that calcium possess a distinguishable role in the reducing softening of fruit, regardless of maturity index. Science Publications 2013 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/29400/1/ajabssp.2013.167.172.pdf Awang, Yahya and Chuni, Siti Hajar and Tengku Muda Mohamed, Mahmud and Yahya, Hafiza and Mohamad, Rosli (2013) Polygalacturonase and pectin methylesterase activities of CaCl2 treated red-fleshed dragon fruit (Hylocereus polyrhizus) harvested at different maturity. American Journal of Agricultural and Biological Sciences, 8 (2). pp. 167-172. ISSN 1557-4989; ESSN: 1557-4997 http://thescipub.com/abstract/10.3844/ajabssp.2013.167.172 10.3844/ajabssp.2013.167.172
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Fruits harvested at different maturity possess different biochemical constituents and physiological properties that make the fruits may react somewhat differently to the postharvest treatment. A study to examine the activity of Polygalacturonase (PG) and Pectin Methylesterase (PME) enzymes during storage in dragon fruit (Hylocereus polyrhizus) harvested at 28 days (Index 3) and 34 days (Index 5) after anthesis and postharvest treated with 0, 2.5, 5.0 and 7.5 g L-1 CaCl2 was performed. The PG activity was lower in younger fruit and vice-versa for PME activity. Increasing concentration of CaCl2 effectively reduced the activity of both enzymes. PG activity for fruit treated with 0, 5 and 7.5 g L-1 CaCl2 increased linearly with the time of storage while its activity for the fruit treated with 2.5 g L-1 CaCl2 was lower at the beginning of storage. PG activity of Index 5 fruits increased almost linearly during storage while its activity in Index 3 fruits was low at the early days of storage and later continued to increase until day seven. At both maturity indices, the PME activity was low at the early days of storage and later continued to increase until day seven. Overall, results obtained indicated that CaCl2 postharvest treatment reduced both PME and PG activities thus slowing down the softening process giving an evident that calcium possess a distinguishable role in the reducing softening of fruit, regardless of maturity index.
format Article
author Awang, Yahya
Chuni, Siti Hajar
Tengku Muda Mohamed, Mahmud
Yahya, Hafiza
Mohamad, Rosli
spellingShingle Awang, Yahya
Chuni, Siti Hajar
Tengku Muda Mohamed, Mahmud
Yahya, Hafiza
Mohamad, Rosli
Polygalacturonase and pectin methylesterase activities of CaCl2 treated red-fleshed dragon fruit (Hylocereus polyrhizus) harvested at different maturity
author_facet Awang, Yahya
Chuni, Siti Hajar
Tengku Muda Mohamed, Mahmud
Yahya, Hafiza
Mohamad, Rosli
author_sort Awang, Yahya
title Polygalacturonase and pectin methylesterase activities of CaCl2 treated red-fleshed dragon fruit (Hylocereus polyrhizus) harvested at different maturity
title_short Polygalacturonase and pectin methylesterase activities of CaCl2 treated red-fleshed dragon fruit (Hylocereus polyrhizus) harvested at different maturity
title_full Polygalacturonase and pectin methylesterase activities of CaCl2 treated red-fleshed dragon fruit (Hylocereus polyrhizus) harvested at different maturity
title_fullStr Polygalacturonase and pectin methylesterase activities of CaCl2 treated red-fleshed dragon fruit (Hylocereus polyrhizus) harvested at different maturity
title_full_unstemmed Polygalacturonase and pectin methylesterase activities of CaCl2 treated red-fleshed dragon fruit (Hylocereus polyrhizus) harvested at different maturity
title_sort polygalacturonase and pectin methylesterase activities of cacl2 treated red-fleshed dragon fruit (hylocereus polyrhizus) harvested at different maturity
publisher Science Publications
publishDate 2013
url http://psasir.upm.edu.my/id/eprint/29400/1/ajabssp.2013.167.172.pdf
http://psasir.upm.edu.my/id/eprint/29400/
http://thescipub.com/abstract/10.3844/ajabssp.2013.167.172
_version_ 1643829749979545600
score 13.211869

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