CAJ | 학술논문

研究了林下（L）云锦杜鹃（Rhododendron fortunei）树苗对林窗（H）和林缘（M）不同强度光照的生理响应。夏季将林下发育成熟的云锦杜鹃树苗分别转移到林窗（L-H）和林缘（L-M）后，云锦杜鹃的最大光化学效率和表观量子效率立即降低，随后L-H植株恢复缓慢，而L-M植株快速恢复并接近原来的水平，表明L-H植株发生了严重的光抑制；转移后一个月，与L-H植株相比，L-M具有较高的光合能力，这与两者之间实际量子效率、叶氮含量、比叶重和叶绿素含量等的差异有关；L-M植株还具有较高的对光能的化学利用效率和较低的非光化学淬灭；林下云锦杜鹃对强光的适应状况取决于其所处环境的光照强度，要适应增强的光照并避免严重的光抑制，转移前后光照强度的差异不能过大，否则将导致严重的光能过剩；林下云锦杜鹃适宜的转移生境是林缘。
연구료림하（L）운금두견（Rhododendron fortunei）수묘대림창（H）화림연（M）불동강도광조적생리향응。하계장림하발육성숙적운금두견수묘분별전이도림창（L-H）화림연（L-M）후，운금두견적최대광화학효솔화표관양자효솔립즉강저，수후L-H식주회복완만，이L-M식주쾌속회복병접근원래적수평，표명L-H식주발생료엄중적광억제；전이후일개월，여L-H식주상비，L-M구유교고적광합능력，저여량자지간실제양자효솔、협담함량、비협중화협록소함량등적차이유관；L-M식주환구유교고적대광능적화학이용효솔화교저적비광화학쉬멸；림하운금두견대강광적괄응상황취결우기소처배경적광조강도，요괄응증강적광조병피면엄중적광억제，전이전후광조강도적차이불능과대，부칙장도치엄중적광능과잉；림하운금두견괄의적전이생경시림연。
Experiments were conducted on the physiological response of understory-developed (L)Rhododendron fortunei saplings exposed to higher light (H: canopy gap, M: forest edge) in the summer. The result demonstrated that the maximum photochemical efficiency of PSII (Fv/Fm) and apparent quantum yield (AQY) decreased immediately and was followed by a slow recovery in L-H leaves and a rapid recovery in L-M leaves, indicating that photoinhibition in L-H leaves was greater than that in L-M leaves. Their difference had correlated with real quantum efficiency of PSII (PhiPSII), leaf N content (Narea), leaf mass per unit area (LMA) and chlorophyll content. L-M leaves had greater photo chemical quenching coefficient (qP) and lower non-photo chemical quenching coefficient (qN), compared to L-H leaves. The experiment demonstrated that the physiological acclimation on exposure to higher light depended on the degree of light. In conclusion, forest edge was proved to be optimal for photosynthesis of shade-developed leaves of R. fortuneisaplings.