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- 저자 : Rashotte, Aaron (검색결과 1 건)
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Si, Ying,Dane, Fenny,Rashotte, Aaron,Kang, Kwonkyoo,Singh, Narendra K. Oxford University Press 2010 Journal of experimental botany Vol.61 No.6
<P>A full-length drought-responsive gene <I>Ccrboh</I>, encoding the respiratory burst oxidase homologue (rboh), was cloned in <I>Citrullus colocynthis</I>, a very drought-tolerant cucurbit species. The robh protein, also named NADPH oxidase, is conserved in plants and animals, and functions in the production of reactive oxygen species (ROS). The <I>Ccrboh</I> gene accumulated in a tissue-specific pattern when <I>C</I>. <I>colocynthis</I> was treated with PEG, abscisic acid (ABA), salicylic acid (SA), jasmonic acid (JA), or NaCl, while the homologous <I>rboh</I> gene did not show any change in <I>C</I>. <I>lanatus</I> var. <I>lanatus</I>, cultivated watermelon, during drought. Grafting experiments were conducted using <I>C</I>. <I>colocynthis</I> or <I>C</I>. <I>lanatus</I> as the rootstock or scion. Results showed that the rootstock significantly affects gene expression in the scion, and some signals might be transported from the root to the shoot. <I>Ccrboh</I> in <I>C</I>. <I>colocynthis</I> was found to function early during plant development, reaching high mRNA transcript levels 3 d after germination. The subcellular location of Ccrboh was investigated by transient expression of the 35S::Ccrboh::GFP fusion construct in protoplasts. The result confirmed that Ccrboh is a transmembrane protein. Our data suggest that <I>Ccrboh</I> might be functionally important during the acclimation of plants to stress and also in plant development. It holds great promise for improving drought tolerance of other cucurbit species.</P>
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