|
|
|
|
|
| Novais,Candido Barreto de; Pepe,Alessandra; Siqueira,José Oswaldo; Giovannetti,Manuela; Sbrana,Cristiana. |
| ABSTRACT: Arbuscular mycorrhizal fungi (AMF), which live in symbiosis with 80 % of plants, are not able to grow when separated from their hosts. Spore germination is not host-regulated and germling growth is shortly arrested in the absence of host roots. Germling survival chances may be increased by hyphal fusions (anastomoses), which allow access to nutrients flowing in the extraradical mycelium (ERM). Perfect anastomoses, occurring with high frequency among germlings and the ERM of the same isolate, show protoplasm continuity and disappearance of hyphal walls. A low frequency of perfect fusions has been detected among co-specific genetically different isolates, although fungal nuclei have been consistently detected in all perfect fusions, suggesting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glomeromycota; Hyphal fusions; Incompatible hyphal interactions; Protoplasmic flow; Nuclear migration. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000500411 |
| |
|
|
| Giancoli,Ágata Cristiane Huppert; Azevedo,João Lúcio de; Kleiner,Aline Aparecida. |
| A development mutant, named V103, was obtained spontaneously from the A strain of A. nidulans. The A strain contains a duplicated segment of chromosome I that has undergone translocation to chromosome II (I → II). It is mitotically unstable and generates phenotypically deteriorated types, some with enhanced stability. The deteriorated variants of A. nidulans show abnormal development, exhibiting slower colony growth, variations in colony pigmentation and changes in conidiophore structure. The alterations observed in the conidiophore include fewer metulae and phialides, further elongation and ramification of these structures, delayed nuclear migration and the presence of secondary conidiophores. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus nidulans; Conidiogenesis; Nuclear migration; Asexual Cycle; Mitotic Instability. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100036 |
| |
|
|
|
