Improvement of Cocoyam (Xanthosoma sagittifolium L. Schott) Minitubers Production under Treatment of Glomus intraradices and Gigaspora margarita and their Impact on some Secondary Metabolite contents
Journal Title: Journal of Plant Science and Research - Year 2017, Vol 4, Issue 2
Abstract
The use of arbuscular mycorrhizae in improving growth and production in plants is increasing. The effect of Glomus intraradices and Gigaspora margarita has been evaluated on the improvement of growth and tuberization in white cocoyam. The intake of mycorrhiza significantly increased the root number in Gi. margarita from 16.40±0.54 at D120, and for the leaf area 40.84±12.62cm2. The fresh and dry biomass and the mycorrhizal dependence increased progressively over time and are more significant in the presence of G. intraradices and Gi. margarita, 42.50±5.87 g; 15.89±4.07 g and 20.65% and 38.11±2.57 g; 15.89±2.35 g and 20.96% respectively at D180. The increase frequency of mycorrhization evaluated was 47% and 44% in G. intraradices and Gi. margarita. For all treatments applied, total chlorophyll content decreased over time. The presence of mycorrhizae almost completely doubled the number of minitubers obtained in the control (17 minitubers), recording 37 minitubers in G. intraradices and 32 minitubercules in Gi. margarita. On the biochemical approach, the application of AMF has a positive effect on the variation in the content of the metabolites studied compared to control. The results showed that when the total soluble sugar, total protein and total phenol contents decreased, the total amino acid and proline levels increased significantly (P<0,05) over time. Significant peaks were observed with Gi. margarita in the leaves 2.19±0.01 mg.g-1 of FW for total soluble sugar on D60; 2.99±0.09 mg.g-1 of FW for total soluble protein on the D60 and D120 respectively and 23.93±0.04 mg.g-1 of FW for the total phenols at day 60. The results obtained showed that cocoyam is a mycotrophic plant.
Authors and Affiliations
Djeuani AC
Keywords
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