Estimation of Chilling Sensitivity and Injury in Gloxinia Leaves by the Thermal Hysteresis of NMR Relaxation Times of Water Protons :

• Kaku,Shosuke

  Biological Laboratory, College of General Education, Kyushu University

• Iwaya-Inoue,Mari

  Biological Laboratory, College of General Education, Kyushu University

抄録

Thermal hysteresis of longitudinal relaxation times (T_1) of water protons in leaf tissues of gloxinia was investigated by pulse nuclear magnetic resonance (NMR) spectroscopy. The profiles of T_1 hysteresis during a slow cool-warm cycle (20 to 0℃) varied with the degree of chilling injury. General trends of T_1 changes upon warming were as follows: (1) a small increase of T_1 was observed when no chilling injury occurred or the degree of injury was minor, (2) a large increase of T_1 occurred when injury increased, (3) a large decrease of T_1 occurred from the earlier stage of warming when serious injury occured. The sum of T_1 ratio (the ratio obtained from the difference between the T_1 value in the cooling process and that of the warming process for eight steps of cool-warm cycle, divided by the former) reflecting T_1 increase or decrease during the warming process was related to varietal difference and seasonal changes of chilling sensitivity. Therefore, T_1 hysteresis can be used as a diagnostic tool in detecting the chilling sensitivity and the degree of chilling injury.

収録刊行物

• Plant and cell physiology

  Plant and cell physiology 28 (3), 509-516,

  Japanese Society of Plant Physiologists

キーワード

• Chilling injury
• Cold hardiness
• Gloxinia (Sinningia speciosa)
• NMR relaxation time
• Thermal hysteresis

詳細情報

• CRID: 1542543045197399296
• NII論文ID: 110003719173
• NII書誌ID: AA0077511X
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10769698
• 本文言語コード: en
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  • CiNii Articles