Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of deprivation of nitrogen.

The process of producing non-motile spores, called conidia, via mitotic asexual reproduction in higher fungi. Conidia are haploid cells genetically identical to their haploid parent. They are produced by conversion of hyphal elements, or are borne on sporogenous cells on or within specialized structures termed conidiophores, and participate in dispersal of the fungus.

The process whose specific outcome is the progression of the cleistothecium over time, from its formation to the mature structure. The cleistothecium is a closed sexual fruiting body that contains ascospores in linear asci, characteristic of some filamentous Ascomycete fungi such as members of the genera Aspergillus and Emericella.

Any process that activates, maintains or increases the frequency, rate or extent of conidium formation, a process of producing non-motile spores, called conidia, via mitotic asexual reproduction in higher fungi. Conidia are haploid cells genetically identical to their haploid parent. They are produced by conversion of hyphal elements, or are borne on sporogenous cells on or within specialized structures termed conidiophores, and participate in dispersal of the fungus.

The process in which a multicellular organism, a unicellular organism or a group of unicellular organisms grow in a threadlike, filamentous shape.

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.