IAA-Dependent Adjustment of the in vivo Wall-Yielding Properties of Hypocotly Segments of Vigna unguiculata during Adaptive Growth Recovery from Osmotic Stress
スポンサーリンク
概要
- 論文の詳細を見る
Regulation of the in vivo yielding properties of the cell wall, namely cell wall extensibility (φ) and effective turgor (P^i-Y), of Vigna hypocotyl segments during adaptive recovery of growth after osmotic stress was investigated by successive measurements using the pressure-jump method. In the absence of IAA, cell wall extensibility (φ) showed no significant changes under osmotic stress but effective turgor (P^i-Y) reduced to near zero, resulting in no growth recovery. In the presence of 10 μMIAA, the cell wall extensibility was slightly decreased even when distinct recovery of growth took place in response to osmotic stress caused by 60 mM sorbitol. The effective turgor, however, showed a characteristic increase in contrast to the wall extensibility. It is not wall extensibility but effective turgor that regulates the cell wall yielding during the adaptive recovery of growth. In excised hypocotyl segments, however, reduced turgor would not be expected to recover, as has been observed in hollow cylinders (Nakahori et al.1990). The results presented here suggest that the IAA-dependent adjustment of the yield threshold plays an indispensable role in wall-yielding for rapid adaptive growth recovery under osmotic stress.
- 日本植物生理学会の論文
著者
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Katou K
Unit Of Biosystems Graduate School Of Human Informatics Nagoya University:school Of Informatics And
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Katou Kiyoshi
Unit Of Biosystems Graduate School Of Human Informatics Nagoya University:school Of Informatics And
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MIZUNO Akiko
Faculty of Social and Information Sciences, Nihon Fukushi University
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Kitamura Sayaka
Unit of Biosystems, Graduate School of Human Informatics, Nagoya University
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Mizuno A
Faculty Of Social And Information Sciences Nihon Fukushi University
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Kitamura Sayaka
Unit Of Biosystems Graduate School Of Human Informatics Nagoya University
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Mizuno Akiko
Faculty Of Social And Information Sciences Nihon Fukushi University
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Mizuno Akiko
Faculty of Social and Information Science, Nihon Fukushi University
関連論文
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- Effects of Osmotic Stress, Ionic Stress and IAA on the Cell-Membrane Resistance of Vigna Hypocotyls
- Regulation of Elongation Growth of Excised segments of Vigna Hypocotyl under Osmotic Stress in the Absence or Presence of Absorbable Solute
- A Pressure-Jump Method as a New Tool in Growth Physiology for Monitoring Physiological Wall Extensibility and Effective Turgor
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- Physiological Significance of the Structure and Components of the Apoplast Canal System for Water Absorption in Plants
- IAA-Dependent Adjustment of the in vivo Wall-Yielding Properties of Hypocotly Segments of Vigna unguiculata during Adaptive Growth Recovery from Osmotic Stress
- Adaptive Growth Responses to Osmotic Stress of Hypocotyl Sections of Vigna unguiculata: Roles of the Xylem Proton Pump and IAA
- THE IN VIVO WALL YIELDING PROPERTIES OF Vigna HYPOCOTYL SECTIONS DURING ADAPTIVE GROWTH RECOVERY UNDER OSMOTIC STRESS