CAJ | 학술논문

采用发光二级管(LED)调制光质和光量,研究不同光质处理对叶用莴苣品种'奶油生菜'和'美国大速生'幼苗叶片气体交换参数及叶绿素荧光的影响.结果表明: LED光源光质提高了叶绿素a、叶绿素b、叶绿素总含量及叶绿素a/b值,品种间叶绿素含量差异显著,'奶油生菜'>'美国大速生';光质对叶用莴苣幼苗叶片光合速率的影响是由非气孔因素引起的,蓝光LED增大了叶片G_s,'奶油生菜'以蓝光LED的光合速率最高,而'美国大速生'以荧光灯处理最高;LED-红∶蓝下叶用莴苣各品种均具有最高的原初光能转化效率、开放的PSII中心有效光化学转化效率、PSII的电子传递速率和叶片PSII潜在活性;与荧光灯相比,LED光源对提高叶用莴苣叶片光合能力具有明显优势,有利于提高叶片的PSII活性和Q_A的还原速率.
채용발광이급관(LED)조제광질화광량,연구불동광질처리대협용와거품충'내유생채'화'미국대속생'유묘협편기체교환삼수급협록소형광적영향.결과표명: LED광원광질제고료협록소a、협록소b、협록소총함량급협록소a/b치,품충간협록소함량차이현저,'내유생채'>'미국대속생';광질대협용와거유묘협편광합속솔적영향시유비기공인소인기적,람광LED증대료협편G_s,'내유생채'이람광LED적광합속솔최고,이'미국대속생'이형광등처리최고;LED-홍∶람하협용와거각품충균구유최고적원초광능전화효솔、개방적PSII중심유효광화학전화효솔、PSII적전자전체속솔화협편PSII잠재활성;여형광등상비,LED광원대제고협용와거협편광합능력구유명현우세,유리우제고협편적PSII활성화Q_A적환원속솔.
The effect of different light quality from light-emitting diode (LED) included LED-R, LED-B, LEDR: B were studied on parameters of gas exchange and chlorophyll fluorescence in the two varieties (Butter Lettuce and Grand Rapid) of lettuce seedlings. Fluorescent light was used as control. The results showed that LED improved the content of chlorophyll a, chlorophyll b and total chlorophyll, increased chlorophyll a/b. There was a remarkable difference in chlorophyll contents between the two varieties, Butter Lettuce showed higher. The effect of light quality on the photosynthetic rate of lettuce seedlings were caused of the impact of non-stomatal factors. Stomatal conductance raised under the LED-B, and Butter Lettuce under LED-B exhibited the highest photosynthetic rate, but which appeared in fluorescent light on Grand Rapid. The application of LED-R:B resulted the maximal photochemical efficiency of PSII (Fv/Fm), Fv'/Fm', ΦPSII,Fv/Fo. The results indicated that LED could improve the rate of Q_A reduction and PSII activity of lettuce leaves, and photosynthetic ability were higher than those under fluorescent light.