Cross8208;talk between nitric oxide and light for the regulation of development

Ref ID: 18476

Author:

Ana T. Marcos, Thorsten Schinko, Marí­a Ramos-Guelfo, Joseph Strauss, David Cánovas

Author address:

Departamento de Genética, Facultad de Biologí­a, Universidad de Sevilla, Spain, Fungal Genetics and Genomics
Unit, AIT-Austrian Institute of Technology and BOKU University, Vienna, Austria,

Full conference title:

11 th European Conference on Fungal Genetics

Abstract:

In Aspergillus nidulans, light is the main signal that influences the decision if cells undergo asexual (conidiation) or
sexual (cleistothecia) development. In all eukaryotes nitric oxide (NO) is an important signalling and defence
molecule and we have shown previously that the short8208;lived nitrogen oxide radical is generated during the nitrate
assimilation process, and detoxified by flavohemoglobin proteins FhbA and FhbB.
Here we report that the metabolism of NO is additionally regulated by light. We found that the expression of the
flavohemoglobin gene fhbB is induced by light and that this regulation depends on the photoreceptor complex.
Our data show that conidiation is gradually repressed by increasing NO levels and at the same time formation of
cleistothecia is promoted. We also found that other metabolic genes which potentially affect NO formation or
consumption are regulated by light and thus may participate in the fine8208;balanced regulation of developmental
decisions in A. nidulans.

Abstract Number: PR2.17

Conference Year: 2012

Link to conference website: http://www.ecfg.info/Abstract_submission.php

New link: NULL

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