Evaluation of Appropriate Storage Technologies for Shelf-life Improvement of Cassava (Manihot esculenta Crantz) Roots for Marginal Upland Farmers

Quevedo, Marcelo A.; Ramos, Arsenio; Iglesia, Ness Marie Sta.

doi:10.32945/atr36s9.2014

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…The increase in dry matter content of the cassava root is caused by the loss of moisture from the root surface due to various biochemical activities. This increases with the storage duration of the root [29]. In the present study, there was a general increase in the dry matter content of all the root samples as reported by Tumuhimbise et al [30].…”

Section: Resultssupporting

confidence: 83%

Influence of Coating Application Methods on the Postharvest Quality of Cassava

Atieno

Owino

Ateka

et al. 2019

International Journal of Food Science

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Various modes of edible coating application vary in their coat dispersion and film formation, hence the need to determine the most effective mode of application for cassava. Edible surface coatings have been found to be effective in preserving the quality of various food products. However, there are variations in effectiveness among the different coating solutions, hence the need for optimization of the concentrations of the gums used. This study aimed at determining the most efficient coating application method on the cassava postharvest quality. Physiologically mature cassava (variety KME 1) was harvested and divided into seven portions. The various portions were coated using 1.5% xanthan gum, 1.5% xanthan/guar gum, and 2% xanthan/guar gum by both dipping and spraying method. There was no significant difference on the colour, total cyanide, ethylene production, and total phenolic content between the two application methods. The 2% xanthan/guar gum coating showed a significant difference on the dry matter content while the 1.5% xanthan gum coating had a significant difference on the respiration rate and weight loss. The 1.5 xanthan treated roots had a final dry matter content of 72.5% for the sprayed samples and 75.98% for the dipped sample while the 2% xanthan/guar gum treated roots had a final dry matter content of 64.6% and 74.1% for the dipped and sprayed root samples, respectively. The 1.5% xanthan and 2% xanthan/guar gum treated roots showed no significant difference in their action on dry matter content. The 1.5% xanthan/guar dipped and sprayed samples differed significantly on their effect on flesh firmness with final values of 35.4N and 46.1N, respectively, at 20 days after harvest. This study suggested that based on the coating solution and the parameters being observed, there generally was no varying effect of dipping and spraying methods of coating application. The choice of the efficient mode of application to use will depend on other factors such as the easiness of application.

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Section: Resultssupporting

confidence: 83%

Influence of Coating Application Methods on the Postharvest Quality of Cassava

Atieno

Owino

Ateka

et al. 2019

International Journal of Food Science

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“…The scoring of PPD symptoms was expressed as percentages of black or brown discolorations areas to total areas using ImageJ software (Zidenga et al 2012;Xu et al 2013;Qin et al 2017). Cassava roots infested with microbes were excluded from the PPD symptom evaluation as suggested by Quevedo et al (2014).…”

Section: Postharvest Physiological Deterioration (Ppd) Evaluationmentioning

confidence: 99%

Effects of harvest period, storage, and genotype on postharvest physiological deterioration responses in cassava

et al. 2021

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Abstract. Rahmawati RK, Khumaida N, Ardie SW, Sukma D, Sudarso. 2021. Effects of harvest period, storage, and genotype on postharvest physiological deterioration responses in cassava. Biodiversitas 23: 100-109. Postharvest physiological deterioration (PPD) is the major constraint in cassava root production. The breeding program to develop PPD tolerant cassava varieties requires a long period to complete. Although it is the first step in breeding for PPD tolerance, evaluating cassava germplasm responses for the PPD remains a major problem because it is a laborious process, and the evaluation often contains a high experimental error. This study aims to develop methods for evaluating PPD response, i.e., evaluating the effects of two harvest periods and storage on PPD responses of nine cassava genotypes. The developed scoring system based on cassava root discoloration could group the evaluated cassava genotypes into either PPD tolerant, medium tolerant, or sensitive. The tolerant varieties showed less than 10% root discoloration areas, while the medium tolerant was between 11-20%, and the sensitive was larger than 20%, respectively. ADR-24 and GJ-11 were identified as PPD tolerant, while ML-19 was sensitive using the developed scoring system. This study showed that PPD is a complex phenomenon associated with genetics and environmental factors. Root dry matter content and maximum root diameter traits may play an important role in PPD development in cassava. We have developed procedures for identifying genotype responses to PPD and showed that cassava roots harvested as early as eight months after planting and stored as late as five days under the control relative humidity were good conditions for studying PPD. Evaluating the percentages of root discoloration was a good measure for PPD response prediction. Moreover, we showed that less than 10%, 20%, and more than 20% of root discoloration might be used to group cassava into PPD tolerant, medium tolerant, and sensitive for Indonesian accessions. Therefore, the methods developed in this study may support the Indonesian cassava breeding program and provide biochemical and molecular analysis materials to elaborate the mechanisms of PPD in cassava roots.

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Evaluation of Appropriate Storage Technologies for Shelf-life Improvement of Cassava (Manihot esculenta Crantz) Roots for Marginal Upland Farmers

Cited by 2 publications

References 3 publications

Influence of Coating Application Methods on the Postharvest Quality of Cassava

Influence of Coating Application Methods on the Postharvest Quality of Cassava

Effects of harvest period, storage, and genotype on postharvest physiological deterioration responses in cassava

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