|
|
|
한국자원식물학회 / v.7, no.1, 2004년, pp.77-86 
|
( Competition Responses of Populus alba Clone ‘Bolleana’ to red:far-red light ) |
| ;;; ;;;
|
|
|
 |
|
| |
| 초 록 |
|
|
| The reduced ratio of red:far-red (R:FR) light acts as a measure of the proximity of competitors and plants can detect the potentially competing neighbor plants by perceiving reflected R:FR signals and initiate the response of “shade avoidance” before actual shading occurs. The phytochrome system is responsible for monitoring the changes in the R:FR and initiating the shade avoidance response. The response to low R:FR ratio was studied in a white aspen Populus alba clone ‘Bolleana’ using two filter systems: a clear plastic filter system that allows a R:FR ratio less than 1.0 to pass from adjacent border plant reflection; and a special commercial plastic that blocks FR light and creates a R:FR ratio above 3.0. The reduced R:FR signals enhanced the stem elongation in response to competition at the expense of relative stem diameter growth. Trees grown inside clear chambers were 27 ％ taller than trees grown inside the FR-blocking filter chambers. Stem taper of clear chamber trees was 16％ less than the FR-blocking filter trees. Low R:FR also induced 22％ more stem dry weight and 13％ greater petiole length per leaf compared to the FR-blocking filter trees. There were no statistically significant differences in leaf area, leaf number increment, and total dry weight between the two light filter treatments. |
| |
| 키워드 |
| red:far-red light;Populus alba;phytochrome;shade-avoidance; |
| |
|
|
|
|
Plant Resources / v.7, no.1, 2004년, pp.77-86
한국자원식물학회
ISSN : 1226-8771
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922345015)
언어 : 영어 |
|
| 논문 제공 : KISTI 한국과학기술정보연구원 |
|
|
|
|
|
|
