Annals of Botany

Gene expression in Musa acuminata during interactions with Meloidogyne incognita

Root-knot nematodes (RKN) (Meloidogyne spp) cause considerable losses in banana (Musa sp.). Castañeda et al. investigate the root transcriptome in Musa acuminata during compatible interactions with M. incognita, showing that the significant modulation of host genes during infection are indicative of defence responses involving reactive oxygen species (ROS) and jasmonic acid (JA) / ethylene (ET) signalling.

Histopathological examination of root sections of Musa acuminata genotypes CAV (left) and 4279-06 (right) infected with Meloidogyne incognita.
Histopathological examination of root sections of Musa acuminata genotypes CAV (left) and 4279-06 (right) infected with Meloidogyne incognita. Root sections (10 μm) were observed under brightfield microscopy following staining with acid fuchsin. (A, B) Second-stage juveniles (J2) migrating inside the root tip. (C) Adult females with egg masses released in the cortical zone. (D) Adult female attached to the central cylinder. (E, F) Adult females with egg masses released in the cortical zone. DAI, days after inoculation; cc, central cylinder; co, cortex; em, egg mass; e, egg; F, female; gc, giant cell.

Concomitant host gene expression alterations are correlated with auxin metabolism, cell wall modification and the development of specialised giant cells that constitute the nutritive source for the nematode. The presented data increases understanding of the compatible interaction and will aid genetic improvement measures for the development of resistance to RKN.

This paper is part of the Annals of Botany Special Issue on Plant Immunity. It will be free access till June 2017 and after April 2018.

Reference

Castañeda, N. E. N., Alves, G. S. C., Almeida, R. M., Amorim, E. P., Fortes Ferreira, C., Togawa, R. C., … Miller, R. N. G. (2017). Gene expression analysis in Musa acuminata during compatible interactions with Meloidogyne incognita . Annals of Botany, mcw272. https://doi.org/10.1093/aob/mcw272

About the author

Annals of Botany Office

The Annals of Botany Office is based at the University of Oxford.

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