Effect of High Temperature on the Development of Cyanide-Sensitive Respiration in the Germination Process of Spinach Seeds

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概要

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• Germination of spinach (Spinacia oleracea L. var. grabra cv. Nobel) seeds was inhibited at a high temperature (35℃). Effects of KCN on the respiration of seeds incubated at 20 and 35℃ were compared in order to investigate the mechanism of inhibition of seed germination by high temperature. Respiration of germinating seeds incubated at 20℃ was inhibited about 50% by 5 mM KCN solution, whereas it hardly inhibited the weak respiration of the seeds at 35℃. Germination of seeds was delayed by exogenous KCN. When the KCN solution was renewed daily, germination was completely inhibited. Pericarp removal promoted germination at 35℃, but atypical germination (cotyledons emerging earlier than a radicle) took up more than half of the total germination. The inhibitory action of KCN on the respiration of seeds was not altered by pericarp removal. A KCN addition, even at 20℃, elicited atypical germination in the pericarp-less seeds. These results show that cyanide-sensitive respiration is needed to induce typical spinach seed germination (root emergence), but is rendered inoperative by high temperatures thus bringing about poor germination and atypical germination.

• 日本植物生理学会の論文

著者

• YAMAMOTO Yukio

  Laboratory of Toxicology Graduate School of Veterinary Medicine, Hokkaido University

• Suganuma Norio

  Laboratory Of Horticultural Science School Of Agriculture Nagoya University

• Tezuka Takafumi

  Laboratory of Horticultural Science, Faculty of Agriculture, Nagoya University

• Tezuka Takafumi

  Laboratory Of Horticultural Science Faculty Of Agriculture Nagoya University

• Tezuka Takafumi

  Laboratory Of Horticultural Science School Of Agriculture Nagoya University

• Ohno Hajime

  Laboratory of Horticultural Science, School of Agriculture, Nagoya University

• Ohno H

  Laboratory Of Horticultural Science School Of Agriculture Nagoya University

• Ohno Hajime

  Laboratory Of Horticultural Science Faculty Of Agriculture Nagoya University

• Yamamoto Yukio

  Laboratory Of Horticultural Science School Of Agriculture Nagoya University

• Yamamoto Yukio

  Laboratory Of Horticultural Science Faculty Of Agriculture Nagoya University

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