|
|
|
|
|
| PÉREZ,LUZ MARÍA; BESOAÍN,XIMENA; REYES,MAURICIO; PARDO,GONZALO; MONTEALEGRE,JAIME. |
| Four isolates of Trichoderma harzianum (ThN3, Th11, Th12 and Th16) were selected for their ability to control the in vitro development of the tomato root pathogen Pyrenochaeta lycopersici. Analysis of the mechanisms involved in biocontrol showed that the formation of non-volatile metabolites appears to be one of those involved in biocontrol of P. lycopersici by all T. harzianum isolates tested. Nevertheless, the higher secretion of chitinases, both in number of isoenzymes and activity by the Th11 strain, correlated well with its higher ability to control this agent in laboratory and greenhouse experiments as compared to the other T. harzianum isolates tested. The secretion of ß -1,3-endoglucanases and/or proteases appeared to have less significance than... |
| Tipo: Journal article |
Palavras-chave: Biological control; Corky root; Tomato root diseases. |
| Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602002000300014 |
| |
|
|
| VERA,MARÍA INÉS; MOLINA,ALFREDO; PINTO,RODRIGO; REYES,MAURICIO; ÁLVAREZ,MARCO; KRAUSKOPF,ERWIN; QUEZADA,CLAUDIA; TORRES,JORGE; KRAUSKOPF,MANUEL. |
| The seasonal adaptation of the teleost Cyprinus carpio to the cyclical changes of its habitat demands physiological compensatory responses. The process involves profound nucleolar adjustments and remarkable changes in rRNA synthesis, which affects ribosomal biosynthesis. In this context, we have demonstrated that the synthesis of several proteins involved in ribosomal biogenesis as protein kinase CK2, ribosomal protein L41 and nucleolin, as well as U3 snoRNP, are differentially regulated in summer-acclimatized carp compared to the cold-season adapted fish. To understand the mechanisms involved in the seasonal regulation of rRNA gene transcription, we have been studying the carp rDNA cistron structure. Because the cis-elements that regulate the expression... |
| Tipo: Journal article |
Palavras-chave: Ribosomal gene; RRNA; RDNA; Fish; Carp. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602003000200014 |
| |
|
|
|
