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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 2
First page : (732) Last page : (739)
Article doi: http://dx.doi.org/10.18782/2320-7051.2514

Assessment of Biochemical Changes during Postharvest Physiological Deterioration in Cassava Tubers

S. Sowmyapriya1, M. K. Kalarani1*, P. Jeyakumar1, Z. John Kennedy2, M. Velmurugan3 and T. Arumugam4
1Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore, India
2Post Harvest Technology Centre, Tamil Nadu Agricultural University, Coimbatore,India
33Tapioca and Castor Research Station, Yethapur, Tamil Nadu, India
4Department of Vegetable Crops, Tamil Nadu Agricultural University, Coimbatore, India
*Corresponding Author E-mail: kalatnau@yahoo.co.in
Received: 25.01.2017  |  Revised: 6.02.2017   |  Accepted: 9.02.2017  


Cassava roots have a short shelf life due to a process known as Post-Harvest Physiological Deterioration (PPD). PPD is a serious problem in cassava that renders the roots unmarketable, thereby reducing the economic value of the crop. This study was undertaken to determine physiological changes of PPD and identify cassava genotypes with delayed PPD that can be used for better shelf life. In the present study, 24 cassava genotypes were collected and assessed for PPD and other physiological changes. Tubers from different cassava genotypes were evaluated at 1,2,3,4 and 5 days after harvest for PPD and Hydrogen Cyanide (HCN). Genotypes CI-850 and YTP-1 were recorded minimum PPD of 9.81 per cent and 11.76 per cent and low production of HCN  12.54 ppm and 17.99 ppm respectively even at fifth day after harvest. In other hand, CI-850 (1.321 mg/g) and YTP -1(0.998 mg/g) tubers accumulated more antioxidant carotenoid. These genotypes were highly tolerant to PPD. These can be used as novel donor sources in breeding programmes aimed for developing PPD tolerant genotypes.

Key words: Cassava, post harvest physiological deterioration, hydrogen cyanide, carotenoid,    shelf life

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Sowmyapriya, S., Kalarani, M.K., Jeyakumar, P., Kennedy, Z.J., Velmurugan, M. and Arumugam, T., Assessment of Biochemical Changes during Postharvest Physiological Deterioration in Cassava Tubers, Int. J. Pure App. Biosci.5(2): 732-739 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2514