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Sweet potato cultivars differ in efficiency of wound healing

Sweet potato cultivars differ in efficiency of wound healing

Van Oirschot, Quirien Elfrida Antoinette, Rees, Deborah ORCID: 0000-0003-3541-0424, Aked, Julia and Kihurani, Agnes (2002) Sweet potato cultivars differ in efficiency of wound healing. Technical Report. Natural Resources Institute, Chatham, UK.

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This paper presents a study on the wound healing in sweet potatoes (Ipomoea batatas Lam.) when exposed to tropical conditions typical for marketing (RH 50% to 73%, T 25oC to 30oC). The physiological processes during healing are revisited. Under sub-optimal humidities (65% +/- 10) the depth of the lignified layer i.e. the thickness of the desiccated cell layers is affected by both cultivar and humidity. Some cultivars consistently failed to produce a lignified layer and for others the layer is often not continuous. The continuity of the lignified layer is more important for effectiveness of wound healing than the actual thickness. A method for assessing efficiency of wound healing based on assessing the continuity of lignified layers was developed, and called the lignification index. Would healing efficiency as measured by the lignification index was found to be a major factor for the shelf-life of sweet potato cultivars. Lignification of wounds correlates with reduced rate of weight loss and reduced susceptibility to microbial infection. A high dry matter content in cultivars correlated with a low lignification index. This relationship was consistent for 5 trials, including 34 cultivars.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: sweet potato, storage root, cultivar, damage, tropical, wound healing, shelf-life, lignification, curing
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
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Last Modified: 18 Nov 2019 15:59

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