种植距离和收获时间对橙肉甘薯品种类胡萝卜素和植物化学物质影响的评价

IF 0.3

International Letters of Natural Sciences Pub Date : 2017-11-01 DOI:10.18052/WWW.SCIPRESS.COM/ILNS.66.17

Obianuju Orimma Kalu, P. Ojimelukwe, A. Ukom

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引用次数: 5

摘要

我们评估了在三个距离（20厘米、30厘米和40厘米）种植并分别在两个不同时期（种植后第12周和第16周）收获的两个OFSP品种（Umuspo 3和Ex-Igbariam）的类胡萝卜素图谱和浓度（通过HPLC）以及植物化学成分。测定了甘薯品种果皮和果肉中的胡萝卜素含量。结果表明，在不同的种植空间和收获期，不同品种的类胡萝卜素和植物化学物质含量差异很大。在20厘米、30厘米和40厘米处种植的Umuspo3的类胡萝卜素浓度显著高于Ex Igbariam品种。主要的类胡萝卜素是β-胡萝卜素，在40厘米的种植距离（92.82µg/g）和30厘米（80.97µg/g。Ex-Igbariam在种植距离为30厘米时，在第16周后收获时含有2.51µg/gβ-胡萝卜素。此外，在收获的第12周，种植30和40厘米（409.45和441.15mg/100g）的Umuspo 3果肉样品和种植30和40cm（分别为490.47和640.69mg/100g）的果皮中的β-胡萝卜素浓度最高。在30厘米处种植并在第12周后收获的Umuspo 3中，黄酮类化合物含量显著（310.62mg/100g），而在30厘米和40厘米处种植的Ex-Igbariam中，总多酚含量显著（≈42.12mg/100g），并在第16周后收获。计算前维生素A类胡萝卜素，Umuspo 3前维生素A的类胡萝卜素显著更高（p<0.05），在40厘米种植距离的样品中存在最高浓度（742.26 RE/100g）。结果表明，种植空间和收获期对OFSP品种的类胡萝卜素和植物化学物质浓度有显著影响。建议种植距离为30和40厘米，以提高两个红薯品种的类胡萝卜素含量。

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Evaluation of the Effect of Planting Distance and Harvesting Time on the Carotenoids and Phytochemicals of Selected Orange-Fleshed Sweet Potato Varieties

We evaluated the carotenoid profile and concentration (by HPLC) and the phytochemical content of two OFSP varieties (Umuspo 3 and Ex-Igbariam) planted at three distances (20 cm, 30 cm and 40 cm) and harvested in two different periods (12th and 16th weeks after planting) respectively. Carotene contents of the outer peel and inner flesh of the sweet potato varieties were also determined. The results showed wide variation in the carotenoid and phytochemical content among the varieties at different planting spaces and harvest periods. Umuspo 3 planted at 20 cm, 30 cm and 40 cm had significantly greater carotenoid concentration than Ex-Igbariam variety. The predominant carotenoid was β-carotene with highest concentration obtained from 40 cm planting distance (92.82µg/g) and 30 cm (80.97µg/g) for Umuspo 3. Ex-Igbariam at 30 cm planting distance contained 2.51µg/g β-carotene when harvested after 16th weeks. Also the highest β-carotene concentration was from Umuspo 3 flesh sample planted 30 and 40 cm (409.45 and 441.15 mg/100g) and the peel for samples planted 30 and 40 cm (490.47 and 640.69 mg/100g, respectively) at the 12th week of harvest. Flavonoids were present in significant amounts (310.62mg/100g) in Umuspo 3 planted at 30 cm and harvested after 12th week while in total polyphenol, significant quantities of ≈42.12mg/100g was present in Ex-Igbariam spaced at 30 cm and 40 cm and harvested after 16th week. Provitamin A carotenoid was calculated and Umuspo 3 pro-vitamin A carotenoid was significantly higher (p< 0.05) with highest concentration (742.26 RE/100g) present in samples from 40 cm planting distance. The results showed that planting space and harvesting period had significant impact on the carotenoid and phytochemical concentrations of OFSP varieties. Planting distances of 30 and 40 cm are recommended for high carotenoid content in the two sweet potato varieties.

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International Letters of Natural Sciences MULTIDISCIPLINARY SCIENCES-

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