Front Plant Sci. 2016 May 31;7:742. doi: 10.3389/fpls.2016.00742. eCollection 2016.

Reduction of Growth and Reproduction of the Biotrophic Fungus Blumeria graminis in the Presence of a Necrotrophic Pathogen.

Frontiers in plant science

Elizabeth S Orton, James K M Brown

PMID: 27303429 PMCID: PMC4885842 DOI: 10.3389/fpls.2016.00742

Abstract

Crops are attacked by many potential pathogens with differing life-history traits, which raises the question of whether or not the outcome of infection by one pathogen may be modulated by a change in the host environment brought on by infection by another pathogen. We investigated the host-mediated interaction between the biotroph Blumeria graminis f.sp. tritici (Bgt), the powdery mildew pathogen of wheat, and the necrotroph Zymoseptoria tritici, which has a long latent, endophytic phase following which it switches to a necrotrophic phase, resulting in the disease symptoms of Septoria tritici blotch. Both diseases are potentially severe in humid temperate climates and are controlled by fungicides and by growing wheat varieties with partial resistance. The compatible interaction between Z. tritici and the host reduced the number, size, and reproductive capacity of mildew colonies that a normally virulent Bgt isolate would produce but did not significantly alter the early development of Bgt on the leaf. The effect on virulent Bgt was elicited only by viable spores of Z. tritici. Notably, this effect was seen before the necrotic foliar symptoms induced by Z. tritici were visible, which implies there is a physiological interaction during the latent, endophytic period of Z. tritici, which either takes place directly between this fungus and Bgt or is mediated by the wheat leaf. Information on how different pathogens interact in host plants may allow plant breeders and others to improve the design of screening trials and selection of germplasm.

Keywords: Blumeria graminis; Zymoseptoria tritici; biotrophic pathogens; co-infection; necrotrophic pathogens; powdery mildew; wheat

References

1. New Phytol. 2007;174(3):637-47 - PubMed
2. Fungal Genet Biol. 2015 Jun;79:8-12 - PubMed
3. Mol Plant Pathol. 2011 Jun;12(5):413-24 - PubMed
4. Mol Plant Pathol. 2007 May;8(3):245-54 - PubMed
5. Mol Plant Pathol. 2000 Jan 1;1(1):41-9 - PubMed
6. Mol Plant Pathol. 2005 Sep 1;6(5):561-75 - PubMed
7. Fungal Genet Biol. 2015 Jun;79:89-93 - PubMed
8. Fungal Genet Biol. 2015 Jun;79:3-7 - PubMed
9. Phytopathology. 1998 Jul;88(7):698-707 - PubMed
10. New Phytol. 2008;179(4):1121-32 - PubMed
11. Plant Signal Behav. 2008 Nov;3(11):993-5 - PubMed
12. Plant Physiol. 2008 Jun;147(2):802-15 - PubMed
13. Proc Natl Acad Sci U S A. 2007 Nov 20;104(47):18842-7 - PubMed
14. Fungal Genet Biol. 2015 Jun;79:29-32 - PubMed
15. Mol Plant Microbe Interact. 2008 Jun;21(6):745-56 - PubMed
16. Fungal Genet Biol. 2015 Jun;79:17-23 - PubMed
17. Phytopathology. 1997 Mar;87(3):266-72 - PubMed
18. Annu Rev Phytopathol. 2015;53:513-39 - PubMed
19. Mol Plant Microbe Interact. 2007 Feb;20(2):178-93 - PubMed
20. Pest Manag Sci. 2014 Nov;70(11):1646-54 - PubMed
21. Plant Physiol. 2015 Mar;167(3):1158-85 - PubMed
22. Adv Appl Microbiol. 2015;90:29-92 - PubMed

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