Abscisic acid-inducible 25 kDa xylem sap protein abundant in winter poplar
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概要
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To investigate the environmental regulation of root function, xylem sap was annually collected from <I>Populus nigra</I> and the proteins in the sap were analyzed. A 25 kDa xylem sap protein (XSP25) was found to be most abundant in the xylem sap in winter and mass spectrometry analyses showed its high similarity to abscisic acid (ABA)-inducible basic secretory protein reported in tobacco BY-2 cells. By utilizing the information of whole genome sequence of <I>Populus</I>, <I>PmXSP25</I> was cloned from <I>Populus maximowiczii</I>, naturally growing poplar in Japan. The expression of <I>PmXSP25</I> was abundant in root at December and February and strongly enhanced by ABA application to the autumn root. We suggest that dormancy- inducing short day length and low temperature promote the synthesis of XSP25 in root, possibly via ABA, as an adaptation to the winter environment.
著者
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Abe Yuta
Graduate School Of Information Production And Systems Waseda University
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Iwai Hiroaki
Graduate School Of Life And Environmental Science University Of Tsukuba
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Mori Hitoshi
Graduate School Of Bio-agricultural Sciences Nagoya University
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Satoh Shinobu
Graduate School Of Life And Environmental Sci. Univ. Of Tsukuba
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FURUKAWA Jun
Graduate School of Life and Environmental Sciences, University of Tsukuba
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Abe Yuta
Graduate School of Life and Environmental Sciences, University of Tsukuba
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Mizuno Hiroaki
Graduate School of Life and Environmental Sciences, University of Tsukuba
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Matsuki Kaoru
Graduate School of Life and Environmental Sciences, University of Tsukuba
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Sagawa Keiko
Graduate School of Life and Environmental Sciences, University of Tsukuba
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