Promotion by gibberellin of lettuce seed germiation as a function of presoaking period |
| |
Authors: | Kojima Hiroshi; Oota Yukito |
| |
Institution: | Biological Institute, Faculty of Science, Nagoya University Chikusa, Nagoya 464, Japan |
| |
Abstract: | Germination of lettuce seeds (Lactuca sativa L. cv. Grand Rapids)was examined in the presence of various doses (105.0103.0M) of gibberellic acid applied at various times (hour 08)of soaking. Germination promotion by gibberellic acid was greateras the dose of gibberellic acid was increased and attenuatedwith the length of the presoaking period. As an exception, ca.95% germination was always evoked by the largest dose (103M) of gibberellic acid given at any time of soaking. The dose-responsecurve obtained for each presoaking period had a distinct sigmoidalprofile. Synergistic and photoreversible promotion by red light of thegibberellin-induced germination was also investigated. Far-redlight pulse given 6 hr after the red pulse was still effectivein removing the red light action. Application of enzyme kineticsto the gibberellin action and also to the synergism betweengibberellin and red light was suggested.
1National Institute for Basic Biology, Myodaiji, Okazaki 444,Japan. (Received December 18, 1979; ) |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|