Phosphorus acquisition efficiency in arbuscular mycorrhizal maize is correlated with the abundance of root-external hyphae and the accumulation of transcripts encoding PHT1 phosphate transporters.

Détails

ID Serval
serval:BIB_B4CD355DF3F3
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Phosphorus acquisition efficiency in arbuscular mycorrhizal maize is correlated with the abundance of root-external hyphae and the accumulation of transcripts encoding PHT1 phosphate transporters.
Périodique
New Phytologist
Auteur(s)
Sawers R.J., Svane S.F., Quan C., Grønlund M., Wozniak B., Gebreselassie M.N., González-Muñoz E., Chávez Montes R.A., Baxter I., Goudet J., Jakobsen I., Paszkowski U.
ISSN
1469-8137 (Electronic)
ISSN-L
0028-646X
Statut éditorial
Publié
Date de publication
2017
Peer-reviewed
Oui
Volume
214
Numéro
2
Pages
632-643
Langue
anglais
Résumé
Plant interactions with arbuscular mycorrhizal fungi have long attracted interest for their potential to promote more efficient use of mineral resources in agriculture. Their use, however, remains limited by a lack of understanding of the processes that determine the outcome of the symbiosis. In this study, the impact of host genotype on growth response to mycorrhizal inoculation was investigated in a panel of diverse maize lines. A panel of 30 maize lines was evaluated with and without inoculation with arbuscular mycorrhizal fungi. The line Oh43 was identified to show superior response and, along with five other reference lines, was characterized in greater detail in a split-compartment system, using (33) P to quantify mycorrhizal phosphorus uptake. Changes in relative growth indicated variation in host capacity to profit from the symbiosis. Shoot phosphate content, abundance of root-internal and -external fungal structures, mycorrhizal phosphorus uptake, and accumulation of transcripts encoding plant PHT1 family phosphate transporters varied among lines. Superior response in Oh43 is correlated with extensive development of root-external hyphae, accumulation of specific Pht1 transcripts and high phosphorus uptake by mycorrhizal plants. The data indicate that host genetic factors influence fungal growth strategy with an impact on plant performance.

Mots-clé
arbuscular mycorrhiza (AM), maize, PHT1, phosphorus, root-external hyphae
Pubmed
Web of science
Open Access
Oui
Création de la notice
24/01/2017 18:55
Dernière modification de la notice
09/05/2019 0:05
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