Fusarium oxysporum Casein Kinase 1, a Negative Regulator of the Plasma Membrane H+-ATPase Pma1, Is Required for Development and Pathogenicity

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Mariscal, M (Author) Other; Miguel-Rojas, C (Author) Other; Hera, C (Author) Other; Fernandes, TR (Author) FCUP; Di Pietro, A (Author) Other

Journal

Title: Journal of Fungi

Vol. 146

Final page: 1300

Publisher: MDPI

Indexing

ISI Web of Knowledge - 0 Citations

Other information

Authenticus ID: P-00X-QT2

DOI: 10.3390/jof8121300

Abstract (EN): Like many hemibiotrophic plant pathogens, the root-infecting vascular wilt fungus Fusarium oxysporum induces an increase in the pH of the surrounding host tissue. How alkalinization promotes fungal infection is not fully understood, but recent studies point towards the role of cytosolic pH (pH(c)) and mitogen-activated protein kinase (MAPK) signaling. In fungi, pH(c) is mainly controlled by the essential plasma membrane H+-ATPase Pma1. Here we created mutants of F. oxysporum lacking casein kinase 1 (Ck1), a known negative regulator of Pma1. We found that the ck1 Delta mutants have constitutively high Pma1 activity and exhibit reduced alkalinization of the surrounding medium as well as decreased hyphal growth and conidiation. Importantly, the ck1 Delta mutants exhibit defects in hyphal chemotropism towards plant roots and in pathogenicity on tomato plants. Thus, Ck1 is a key regulator of the development and virulence of F. oxysporum.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15