Comparison of cell wall degrading enzyme activities during ripening of guava fruit on-tree and in-storage

Published

2012-09-27

Keywords:

Cellulase, exo-polygalacturonase, guava, pectin methyl esterase, β-D-galactosidase
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Authors

  • Arti Sharma Department of Horticulture, CCS Haryana Agricultural University, Hisar 125 004, Haryana
  • R.K. Sharma Department of Horticulture, CCS Haryana Agricultural University, Hisar 125 004, Haryana
  • Saleem Siddiqui Department of Horticulture, CCS Haryana Agricultural University, Hisar 125 004, Haryana
  • Bindiya Sharma Department of Horticulture, CCS Haryana Agricultural University, Hisar 125 004, Haryana

Abstract

Changes in the activities of various cell wall degrading enzymes, viz., exo-polygalacturonase (PG), β-Dgalactosidase, cellulase and pectin methyl esterase (PME) were assayed on alternate days. Activities of PG, β-D-galactosidase and cellulase increased continuously with the advancement of ripening on-tree as well as in-storage, whereas the activity of PME showed a fluctuating trend, it initially increased and thereafter showed a declining trend during ripening on-tree as well as in-storage. Further the activities of PG, β-D-galactosidase and cellulase showed a very high negative correlation with loss of fruit firmness during ripening, whereas the activity of PME did not showed a significant correlation with firmness. Changes in the activities of all the enzymes studied were faster during ripening in-storage as compared to ripening on-tree in both the cultivars; however cv. Hisar Surkha exhibited faster changes than cv. Hisar Safeda. Changes in enzymatic activities were rapid in rainy season than winter season crop.

How to Cite

Sharma, A., Sharma, R., Siddiqui, S., & Sharma, B. (2012). Comparison of cell wall degrading enzyme activities during ripening of guava fruit on-tree and in-storage. Indian Journal of Horticulture, 69(03), 409–415. Retrieved from https://journal.iahs.org.in/index.php/ijh/article/view/2013

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