J. Furukawa, Yuta Abe, H. Mizuno, Kaoru Matsuki, Keiko Sagawa, H. Mori, H. Iwai, S. Satoh
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引用次数: 2
Abstract
To investigate the environmental regulation of root function, xylem sap was annually collected from Populus nigra 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 Populus, PmXSP25 was cloned from Populus maximowiczii, naturally growing poplar in Japan. The expression of PmXSP25 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.
期刊介绍：
Plant Root publishes original papers, either theoretical or experimental, that provide novel insights into plant roots. The Journal’s subjects include, but are not restricted to, anatomy and morphology, cellular and molecular biology, biochemistry, physiology, interactions with soil, mineral nutrients, water, symbionts and pathogens, food culture, together with ecological, genetic and methodological aspects related to plant roots and rhizosphere. Work at any scale, from the molecular to the community level, is welcomed.
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