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| Jan,Nishawar; ul-Hussain,Mahboob; Andrabi,Khurshid I.. |
| Herbaceous temperate plants are capable of developing freezing tolerance when they are exposed to low nonfreezing temperatures. Acquired freezing tolerance involves extensive reprogramming of gene expression and metabolism. Recent full-genome transcript profiling studies, in combination with mutational and transgenic plant analyses, have provided a snapshot of the complex transcriptional network that operates under cold stress. The changes in expression of hundreds of genes in response to cold temperatures are followed by increases in the levels of hundreds of metabolites, some of which are known to have protective effects against the damaging effects of cold stress. Genetic analysis has revealed important roles for cellular metabolic signals, and for RNA... |
| Tipo: Journal article |
Palavras-chave: Cold acclimation; Cold resistance; CORs (cold regulated). |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000300014 |
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| CASTRO-ARÉVALO,MAURICIO; REYES-DÍAZ,MARJORIE; ALBERDI,MIREN; JARA-RODRÍGUEZ,VALERIA; SANHUEZA,CAROLINA; CORCUERA,LUIS J; BRAVO,LEÓN A. |
| Embothrium coccineum, Gevuina avellana, and Lomaría ferruginea grow in habitats contrasting in temperature and light intensity. Embothrium coccineum is a pioneer species that establishes itself in open sites completely exposed to variable sunlight and temperature. Gevuina avellana is usually found in more protected sites. Lomaría ferruginea regenerates under the canopy in sites with low thermal oscillations and high humidity. In order to establish an association of their habitats with functional attributes of each species, we studied their photosynthetic responses to temperature and light intensity. We expected that E. coccineum, which grows at full sun, is able to acclimate much better its photosynthetic apparatus to different temperatures than the shade... |
| Tipo: Journal article |
Palavras-chave: Proteaceae; Cold acclimation; Photosynthetic oxygen evolution; Photochemical efficiency of PSII. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000300002 |
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