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Silicon acquisition by bananas (c.V. Grande Naine) is increased in presence of the arbuscular mycorrhizal fungus Rhizophagus irregularis MUCL 41833

Oye Anda, Corinne Coretta, Opfergelt, Sophie, Declerck, Stéphane
Plant and soil 2016 v.409 no.1-2 pp. 77-85
Rhizophagus irregularis, bananas, leaves, mycorrhizal fungi, pests, phosphorus, roots, shoots, silicon
AIM: This work aimed to investigate the role of arbuscular mycorrhizal fungi (AMF) in the uptake and accumulation of silicon (Si) in banana plants. Si is recognized as a significant element that helps plants resist stresses. METHODS: A pot experiment compared the growth, Si and P accumulation of banana plants pre-colonized or not by an AMF and exposed or not to Si added to the growth substrate. RESULTS: A marked increase in Si was noticed in pseudostem, leaves and roots of pre-colonized banana plants, in presence as well as in absence of Si added to the growth substrate. Without Si addition, this accumulation was 60 % and 45 % higher in pseudostem and leaves, respectively, while it was 47 % and 41 % in presence of Si added to the substrate. In roots, this increase was 23 % and 52 % in presence and absence of Si added to the substrate, respectively. Phosphorus content in shoots and roots was likewise significantly increased in presence of AMF or Si. CONCLUSION: Our findings revealed that pre-colonized banana plants accumulated more Si in shoot and roots than non-mycorrhizal plants and may thus represent a potential novel avenue to explore banana resistance to pests and diseases.