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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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| Moraga S.,Priscila; Escobar,René; Valenzuela A.,Sofía. |
| The resistance to low temperatures was assessed in seedlings of three subspecies of E. globulus (ssp globulus, ssp bicostata and ssp maidenii) of two different provenances. Lethal temperature 50 (LT50) was obtained by measuring the electrolytic conductivity, nucleation and freezing temperatures were obtained by thermal analysis and the total soluble carbohydrates concentration was determined through the phenol-sulphuric method. Results showed that the most resistant provenance corresponded to Bolaro Mountain of ssp maidenii with a LT50 lower than -9ºC. The provenance Moogora of ssp globulus, had a LT50 of -8.47ºC, which situates it, as the second most resistant to low temperatures. According to the nucleation and freezing temperatures,... |
| Tipo: Journal article |
Palavras-chave: Cold resistance; Ssp bicostata; Ssp globulus; Ssp maidenii. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300026 |
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