Análise do microtranscritoma em variedades de cana-de-açúcar (Saccharum spp.) submetidas a estresse hídrico / Microtranscriptome analysis of sugarcane (Saccharum spp.) cultivars under drought stress

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

23/02/2011

RESUMO

Sugarcane (Saccharum spp.) is amongst the most relevant crops in the world and Brazil is the most prominent producer. It is an inexpensive and efficient source for commodities such as sugar and ethanol, the latter being increasingly considered the most promising immediate energy source substitute for oil, mainly in transportation. Apart from being very productive, it is largely affected by stress-related yield losses, notably from abiotic triggers. Drought stress is determinant for every crop field, and this is true for sugarcane as well. Although the molecular basis drought stress tolerance lacks further elucidation, newly developed cultivars have successfully reduced yield loss due to water shortage, albeit not at the desirable pace. Functional genomics and molecular markers development assist new cultivar selection programs by identifying and locating agronomically relevant alleles and QTL s, but there are other elements in the genome which can provide new ways to approach crop field improvement. The recently discovered microRNAs (miRNA) are regulatory genes found to have an important role in plants adaptation under different kinds of stresses. By using sugarcane ESTs, deep-sequencing and microarray technology to access stress induced miRNA expression, we have found novel sugarcane miRNA participating in the drought stress response and identified possible tolerance related miRNA genes.

ASSUNTO(S)

mirna micrornas microarranjos de dna sequenciamento de dna secas cana-de-açúcar mirna microrna dna microarrays dna sequencing drought sugarcane

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