INVESTIGADORES
CASATI Paula
artículos
Título:
Distinctive Transcriptome Responses to Adverse Environmental Conditions in Zea mays L.
Autor/es:
FERNANDES J; MORROW, D.J.; CASATI, P; WALBOT, V
Revista:
Plant Biotechnology Journal
Editorial:
Wiley-Blackwell
Referencias:
Año: 2008 vol. 6 p. 782 - 798
ISSN:
1467-7652
Resumen:
Maize seedling transcriptome responses to six abiotic perturbations (heat, cold, darkness,
desiccation, salt, ultraviolet-B) were analysed. Approximately 7800 transcripts were
expressed in one or more treatments compared with light-grown seedlings plus juvenile
leaves from field-grown plants. Approximately 5200 transcripts were expressed in one
or more treatments and absent in light-grown seedlings. Approximately 2000 transcripts
were unique to one treatment. Salt and heat elicited the largest number of transcript
changes; however, salt resulted in mostly a decreased abundance of transcripts, whereas
heat shock resulted in mostly an increased abundance of transcripts. A total of 384
transcripts were common to all stress treatments and not expressed in light-grown
seedlings; 146 transcripts were present in light-grown seedlings and absent from all stress
treatments. A complex pattern of overlapping transcripts between treatments was found,
and a significant pattern of congruence in the direction of transcript change between pairs
of treatments was uncovered. From the analysis, it appears that the scope of gene
expression changes is determined by the challenge, indicating specificity in perception and
response. Nonetheless, transcripts regulated by multiple responses are generally affected
in the same manner, indicating common or converging regulatory networks.
The data are available for additional analysis through a searchable database.