Diurnal change in temperature sensitivity of Lemna gibba G3 induced by acetylcholine in continuous light

概要

論文の詳細を見る
When Lemna gibba G3 was in contact with 10^<-5> M Ach or eserine, floral response to chilling changed diurnally under [24(0)], as was the case for control cultures exposed to [16(8)]. On the other hand, with a rise in temperature, the min-[24(0)] decreased discontinuously in 24-hr units in Ach cultures subjected to [24(0)], as did the min-[16(8)] in control cultures. Thus in the presence of Ach or eserine, this long-day plant took the continuous light regime, i.e. [24(0)], for another type of long-day regime consisting of a long light period and a short dark period, e.g. [16(8)]. In Ach cultures, the lower limit of the min-[24(0)] (72 hr) was attained at 22.5℃ and remained unaltered at the higher temperatures examined. The min-[16(8)] for control cultures, however, is known to reach its lower limit (48 hr) at 26℃. Sodium lauryl sulphate (10^<-5> M) and ouabain (10^<-6> M) also caused a similar diurnal change in temperature sensitivity of [24(0)] cultures. We surmised that exogenous Ach or inserted dark period modifies the relative rates of chemical and physical component reactions involved in the floral evocation processes, resulting in the rhythmical floral response to chilling.
日本植物生理学会の論文