DdaCrz1, a C2H2-Type Transcription Factor, Regulates Growth, Conidiation, and Stress Resistance in the Nematode-Trapping Fungus Drechslerella dactyloides

Xiaozhou Zhao, Yani Fan, Meichun Xiang, Seogchan Kang, Shunxian Wang, Xingzhong Liu

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The Ca2+/calmodulin-dependent signaling pathway regulates diverse cellular processes. Calcineurin is a calcium-dependent phosphatase acting in fungi mainly through Crz1, a zinc finger transcription factor. Although the likely involvement of Ca2+ in fungal carnivorism has been documented, how Crz1 functions in nematode-trapping fungi remains unknown. Here, we identified the Crz1 gene (named as DdaCrz1) in Drechslerella dactyloides, a species that forms constricting rings to trap nematodes. The deletion of DdaCrz1 significantly reduced hyphal growth and conidiation, trap formation, and ring cell inflation. Moreover, the mutation increased sensitivity to Mn2+ but decreased sensitivity to Ca2+, Mg2+, Zn2+, and Li+. Similarly, the mutant showed increased tolerance to osmotic stress but was more sensitive to Congo red, a cell wall-damaging agent. Our results confirmed the critical roles of the Ca2+/calmodulin-dependent signaling pathway in regulating growth, conidiation, and the stress response, and suggested its involvement in trapping nematodes.

Original languageEnglish (US)
Article number750
JournalJournal of Fungi
Volume8
Issue number7
DOIs
StatePublished - Jul 2022

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science
  • Microbiology (medical)

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