Flowering response oflemna paucicostata in japan |
| |
Authors: | Itsuki Yukawa Atsushi Takimoto |
| |
Institution: | (1) Laboratory of Applied Botany, Faculty of Agriculture, Kyoto University, 606 Kyoto |
| |
Abstract: | Twenty-two strains ofLemna paucicostata collected from various districts in Japan are classified into 4 types having different morphological features and photoperiodic
behaviors. (I) The “N-1” type, widely distributed in north and middle Japan, consists of many short-day strains with similar
morphological characteristics. The strain of northern origin, however, has a shorter critical dark period than that of southern
origin, and most of the strains flower in response to a single short day though some from middle Japan require 2 short days.
(2) The “N-2” type, found in a limited area of northern Japan, is also a short-day type, but has very long critical dark periods
and requires 3–5 short-day cycles for flowering. (3) The “S” type, distributed in southern Japan, never flowered in any photoperiod
or culture conditions tested. (4) The “K” type, strain 351, collected at the experimental farm of Kyoto University, is a day-neutral
type and flowers independently of photoperiod.
Application of some SH inhibitors, tungstate or EDTA, or exposure to blue, far-red or low-intensity light caused daylength-independent
flowering in short-day strain 6746 (California origin), but none of these treatments caused flowering in any short-day strain
collected in Japan. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|