Cuscuta campestris fine-tunes gene expression during haustoriogenesis as an adaptation to different hosts

Author:

Bawin Thomas1ORCID,Didriksen Alena1ORCID,Faehn Corine1ORCID,Olsen Stian1ORCID,Sørensen Iben2ORCID,Rose Jocelyn K C2ORCID,Krause Kirsten1ORCID

Affiliation:

1. Department of Arctic and Marine Biology, UiT The Arctic University of Norway , Tromsø 9019 , Norway

2. Plant Biology Section, School of Integrative Plant Science, Cornell University , Ithaca, NY 14853 , USA

Abstract

Abstract The Cuscuta genus comprises obligate parasitic plants that have an unusually wide host range. Whether Cuscuta uses different infection strategies for different hosts or whether the infection strategy is mechanistically and enzymatically conserved remains unknown. To address this, we investigated molecular events during the interaction between field dodder (Cuscuta campestris) and two host species of the Solanum genus that are known to react differently to parasitic infection. We found that host gene induction, particularly of cell wall fortifying genes, coincided with a differential induction of genes for cell wall degradation in the parasite in the cultivated tomato (Solanum lycopersicum) but not in a wild relative (Solanum pennellii). This indicates that the parasite can adjust its gene expression in response to its host. This idea was supported by the increased expression of C. campestris genes encoding an endo-β-1,4-mannanase in response to exposure of the parasite to purified mono- and polysaccharides in a host-independent infection system. Our results suggest multiple key roles of the host cell wall in determining the outcome of an infection attempt.

Funder

Tromsø Research Foundation

Research Council of Norway

Publisher

Oxford University Press (OUP)

Subject

Plant Science,Genetics,Physiology

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