CAJ | 학술논문

对生菜(Lactuca sativa)分别均匀喷洒浓度为70、140、280μg/L的杀虫剂氰戊菊酯，以清水为对照，以意大利全年耐抽薹生菜为试材，结果表明，随着农药浓度的增加，光系统Ⅱ的最大光化学效率、实际光化学效率、光化学淬灭系数和相对电子传递速率均下降，非光化学淬灭系数、非调节性能量耗散的量子产额和调节性能量耗散的量子产额上升，综合影响造成光系统Ⅱ的中心活性区域缩小、光合速率下降。另外生菜叶片自身的光化合保护机制能在一定程度上减轻农药的胁迫作用。与对照相比，光系统Ⅱ的实际光化学效率受农药影响最大，喷洒浓度为280μg/L的杀虫剂会对生菜光合作用过程产生持续性的、不可逆转的影响。
대생채(Lactuca sativa)분별균균분쇄농도위70、140、280μg/L적살충제청무국지，이청수위대조，이의대리전년내추대생채위시재，결과표명，수착농약농도적증가，광계통Ⅱ적최대광화학효솔、실제광화학효솔、광화학쉬멸계수화상대전자전체속솔균하강，비광화학쉬멸계수、비조절성능량모산적양자산액화조절성능량모산적양자산액상승，종합영향조성광계통Ⅱ적중심활성구역축소、광합속솔하강。령외생채협편자신적광화합보호궤제능재일정정도상감경농약적협박작용。여대조상비，광계통Ⅱ적실제광화학효솔수농약영향최대，분쇄농도위280μg/L적살충제회대생채광합작용과정산생지속성적、불가역전적영향。
The Italy lettuce samples were sprayed evenly with water and pesticide fenvalerate with concentrations of 70,140,280 μg/L to study the adverse effect of pesticide on chlorophyll fluorescence parameters of lettuce leaves.With the increase of concentration of pesticide sprayed on the lettuce leaves,the biggest photosynthetic efficiency of photosystem Ⅱ(Fv/Fm),actual photosynthetic efficiency YI,photochemical quenching coefficient (qP) and relative electron transport rate declined and showed a clear decrease,meanwhile the non-photochemical quenching coefficient (qN),regulatory quantum yield of energy dissipation (Y NPQ) and non-regulatory quantum yield of energy dissipation (Y NO) increased significantly. Because of these disturbances,centre activity area of photosystem Ⅱ and actual photochemical efficiency was reduced. Light protection mechanisms of the lettuce leaves alleviated the impact of pesticides to a certain extent.Compared with control group,the actual photosynthetic efficiency of photosystem Ⅱ was one of the most exposed to effects from pesticide.The influence of 280μg/L pesticides on lettuce photosynthesis was continuous and irreversible.