|
|
|
한국식물학회 / v.50, no.4, 2007년, pp.480-483 
|
( Effects of Light on Ultradian Rhythms in the Lateral Leaflets of Desmodium gyrans ) |
| ;; ;;
|
|
|
 |
|
| |
| 초 록 |
|
|
| Rhythmic up-down movements were studied in the lateral leaflets of Desmodium gyrans (L.F.) DC. These were recorded with a video-computer system, whereby the digital video signals from a CCD camera were processed with special software. Under control conditions ($24^{circ}C;and;0.1nM;cm^{-2} s^{-1}$ of stable, dim light), the average period of lateral leaflet movement was 3.5 min. In the presence of light stimuli (for 2 min), those leaflets always moved toward the light, regardless of where it was applied to any axial part of the pulvinus. The strongest effect was manifested by a reduced amplitude of movement and, thus, a shortened period, which could be up to ${sim}43%$ less under moderate light intensity $(5nM cm^{-2} s^{-1})$. Oscillations regained their original regularity over ${sim}10$ cycles after the light stimulus was removed. In addition, these oscillations temporarily disappeared after long exposure $({sim}10 min)$ under moderate light, or when the leaflets were quickly exposed to a higher intensity $({sim}12nM;cm^{-2}s^{-1})$. Therefore, we have now demonstrated that light can affect physiological parameters that are involved in the control of oscillations. |
| |
| 키워드 |
| Desmodium gyrans;lateral leaflet;light stimulus;oscillation;pulvinus; |
| |
|
|
|
|
Journal of Plant Biology / v.50, no.4, 2007년, pp.480-483
한국식물학회
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200734515987598)
언어 : 영어 |
|
| 논문 제공 : KISTI 한국과학기술정보연구원 |
|
|
|
|
|
|
