Removal by chemicals of photoperiodic light requirements of Lemna gibba G3
スポンサーリンク
概要
- 論文の詳細を見る
Both the initial and the terminal 1 hr portions of the subjective day fraction, namely the L1- and L2-phases, of a 24 hr day must be illuminated in order for the day to be perceived as a long day in the min-LD determination by the long-day plant. Lemna gibba G3 (9). The light requirement of the L1-phase was satisfied by a 10 min red light pulse given at the beginning of the phase. The red light effect was erased by a subsequent 10 min far-red light, indicating phytochrome-mediated processes occurring in the L1-phase. The light requirement of the L2-phase was satisfied by blue or far-red light given during the terminal 10 min period of the phase; there was no indication of phytochrome involvement. The light action on the L1-phase was replaced by 10^<-5> M of cyclic AMP or 10^<-7> M of DL-isoproterenol. The isoproterenol action was antagonized by 10^<-7> M of DL-propranolol. Cyclic AMP (10^<-5> M) combined with salicylic acid (10^<-6> M), which can remove the light requirement of the L2-phase (10), rendered a completely dark day physiologically equivalent to a long day. Acetylcholine (10^<-5> M) exerted nyctomimetic action on the L1-phase of the second light day. The action of acetylcholine was antagonized by cyclic AMP (10^<-5> M). The L2-phase required no light in the presence of 10^<-7> M of DL-propranolol, and this propranolol action was not affected by isoproterenol. These findings suggest changes in membrane permeability caused by the light given during the. L1- and L2-phases.
- 日本植物生理学会の論文
著者
関連論文
- Periodical growth response of Lemna gibba G3 to light-break
- FLOWERING IN LEMNA GIBBA G3
- Short-day flowering of Lemna gibba G3 induced by salicylic acid
- Spectral dependence of the critical photoperiod in the long-day duckweed, Lemna gibba G3
- Promotion by gibberellin of lettuce seed germination as a function of presoaking period
- Removal by chemicals of photoperiodic light requirements of Lemna gibba G3
- EFFECTS OF NUCLEIC ACID- AND PROTEIN-ANTIMETABOLITES ON FROND AND FLOWER PRODUCTION IN LEMNA GIBBA G3
- Diurnal change in temperature sensitivity of Lemna gibba G3 induced by acetylcholine in continuous light
- The occurrence of acetylcholine in Lemna gibba G3
- FLOWERING IN LEMNA PAUCICOSTATA AS COMPARED WITH THAT IN LEMNA PERPUSILLA 6746
- Replacement by ionophores of the photoperiodic light requirement in Lemna gibba G3
- Photoperiodic requirements for flowering of the long-day duckweed, Lemna gibba G3
- The response of Lemna gibba G3 to a single long day in the presence of EDTA
- Evidence against involvement of circadian floral rhythm in the critical daylength measurement in Lemna gibba G3
- Removal by cyclic AMP of the inhibition of duckweed flowering due to ammonium and water-treatment
- LIGHT- AND DARK-GROWTH IN LONG-DAY DUCKWEED, LEMNA GIBBA G3, AS AFFECTED BY KINETIN
- EFFECTS OF GROWTH SUBSTANCES ON FROND AND FLOWER PRODUCTION IN LEMNA GIBBA G3
- A possible mechanism for sugar inhibition of duckweed flowering
- Resemblance of growth substances to metal chelators with respect to their actions on duckweed growth
- RIBONUCLEIC ACIDS IN SOLUBLE CYTOPLASM OF GERMINATING BEAN
- Disappearance of rhythmicity in growth response to dark- and light-breaks in Lemna gibba G3 due to iron deficiency
- Frond and flower production in Lemna gibba G3 in presence of respiratory inhibitors