Anoxia tolerance and ethanol sensitivity of rice and oat coleoptiles |
| |
Authors: | Hisashi Kato-Noguchi Takayuki Kugimiya |
| |
Affiliation: | (1) Department of Biochemistry and Food Science, Faculty of Agriculture, Kagawa University, Miki, 761-0795 Kagawa, Japan |
| |
Abstract: | Anoxia tolerance and ethanol sensitivity of rice (Oryza sativa L.) and oat (Avena sativa L.) seedlings were evaluated to clarify their growth habit in anoxia. Anoxic stress inhibited elongation and dry weight gain of coleoptiles of the oat and rice seedlings; however, the inhibition of the oat coleoptiles was much greater than that of the rice coleoptiles. Anoxic stress increased endogenous ethanol concentration and alcohol dehydrogenase activity in oat and rice coleoptiles and their increases in the rice coleoptiles were much greater than those in the oat coleoptiles. At concentrations greater than 30 mM and 300 mM, exogenously applied ethanol inhibited the elongation and weight gain for the oat and the rice coleoptiles, respectively, and the inhibition was increased with increasing ethanol concentrations with marked inhibition being achieved on the oat coleoptiles. These results suggest that anoxia tolerance and induction of ethanolic fermentation in anoxia may be greater in rice than oat, and ethanol sensitivity of rice may be lower than that of oat. |
| |
Keywords: | Anoxia Avena sativa ethanol sensitivity growth Oryza sativa tolerance toxicity |
本文献已被 SpringerLink 等数据库收录! |
|