Ekspresi Gen GFDD4-1 pada Physcomitrella patens dan Gen Homolog pada Arabidopsis thaliana dalam Respons terhadap Cekaman Abiotik

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A number of abiotic stress responsive genes have been identified from various plant species through reverse genetic strategy. A group of genes are involved in plant responses to stress; they are activated by diverse stress conditions and through different mechanisms. One single gene can be induced by several different stress factors; on the other hand, a number of genes can be up-regulated by a single factor. In Physcomitrella patens , through Northern hybridization, the transcript level of the gene GFDD4-I was detected to be markedly increased by ABA, dehydration and cold, but not by salinity and osmotic stress. In Arabidopsis thaliana , a homologous gene to GFDD4-1 namely At2g47770 , was confirmed to fulfill similar function as in P. patens : it is inducible by various abiotic stress treatments, i.e. ABA, dehydration, salinity, and cold. Inducible genes in response to abiotic stress factors may be responsible for plant tolerance to those factors.