TITLE:
Morphological Characterization of Arbuscular Mycorrhizal Fungi Associated with the Rhizosphere According to the Age of Xanthosoma sagittifolium L. Schott Plants in the Field
AUTHORS:
Audrey Maguy Bengono Nyimiebolo, Astride Carole Djeuani, Hermann Désiré Mbouobda, Antoine Marie Kevin Tiki, Theresa Akinimbom Moma, Diobe Motassy Manuela, Samuel Brice Adounga, Christophe Fendju Pangueko, Jones Nshanji, Issofa Nguetrapouna, Rose Theophine Derricka Djem Moutamal, A. Ziem Amang Amang, Nicolas Niemenak
KEYWORDS:
Xanthosoma sagittifolium L. Schott, Rhizosphere, Harvest Site, Arbuscular Mycorrhizal Fungi, Diversity
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.15 No.3,
March
20,
2024
ABSTRACT: The objective of this work was to carry out a morphological
characterization of arbuscular mycorrhizal fungi in the rhizosphere of Xanthosoma
sagittifolium L. Schott plants. The plant material used was the white and
red cultivars of X. sagittifolium, belonging to age intervals of 3 - 6,
6 - 9, and 9 - 12 months. Three harvest sites were chosen in the Central Region
of Cameroon. In each site, soil from the rhizosphere and plant roots was
collected in a randomized manner. In the field, the agronomic parameters were
evaluated. The physicochemical characteristics of the soils, the mycorrhization
index, and the morphological characterization of the mycorrhizal types of each
site were carried out. The results obtained show that the agronomic growth
parameters varied significantly using the Student Newman and Keuls Test
depending on the harvest sites. The soils’ pH in all sites was acidic and
ranged between 4.6 and 5.8. The Nkometou site has a loamy texture while the
Olembe and Soa sites have loam-clay-sandy and loam-clay textures respectively.
The highest mycorrhization frequencies
appeared at the Nkometou site, with 75 and 87.33% of the white and red
cultivars plant roots at 6 - 9 and 3 - 6 months. The relative abundance of AMF
arbuscular mycorrhizal fungal spores in the rhizosphere of X. sagittifolium plants varied with age and cultivar. There were 673 spores between 9 - 12
months in Nkometou in the red cultivar. Six AMF genera were identified in all
the different soils collected: Acaulospora sp., Funneliformis sp., Gigaspora sp., Glomus sp., Scutellospora sp., and Septoglomus sp. The genus Glomus sp. was the most present at all age intervals in
both cultivars.