J. Furukawa, Yuta Abe, H. Mizuno, Kaoru Matsuki, Keiko Sagawa, M. Kojima, H. Sakakibara, H. Iwai, S. Satoh
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引用次数: 21
Abstract
Deciduous trees show annual periodicity in shoot growth and development, but such periodicity is not well investigated in roots. To clarify the seasonal fluctuation in root functions, xylem sap from Populus nigra branches was analyzed for 2 years. Various xylem sap components including calcium, potassium, glucose, and proteins showed seasonal fluctuations with peaks from winter to spring. Abscisic acid (ABA) was the most abundant hormone in the xylem sap throughout all seasons and showed two peaks from late autumn to spring. We hypothesize that low temperature in winter promotes metal loading into the xylem sap and the synthesis of proteins and sugars in roots as an adaptation to the winter environment and to prepare for spring bud burst. acetic acid; IA-Ala, indole-3-acetyl- L-alanine; IA-Ile, indole-3-acetyl-L-isoleucine; IA-Leu, indole-3-acetyl- L-leucine; IA-Asp, indole-3-acetyl-L-aspartic acid; IA-Trp, indole-3-acetyl-L-tryptophan; IA-Phe, indole- 3-acetyl-L-phenylalanine; GA, gibberellic acid; ABA, abscisic acid
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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