不同光质配比对大豆幼苗形态及光合生理参数的影响  

Effects of different light qualities on morphological and photosynthetic physiological parameters of soybean seedlings

作　　者：张勇 叶芝兰 杨峰[1] 张丽君[1] 聂邵仙 杨文钰[1] 

机构地区：[1]四川农业大学农学院,农业部西南作物生理生态与耕作重点实验室,四川成都611130

出　　处：《中国油料作物学报》2014年第3期343-348,共6页Chinese Journal of Oil Crop Sciences

基　　金：农业部公益性行业科研专项(201203096);四川省博士后基金(04310624);四川农业大学创新性实验计划(4060562;00109253)

摘　　要：室内模拟玉米/大豆套作下大豆冠层光质配比,设定白光(对照)、红光/蓝光为0.8和红/远红光为0.6三个处理,大豆品种选用贡选1号和桂夏3号,研究大豆幼苗形态及光合生理参数在不同光质配比下的变化特征。结果表明:红光/蓝光配比和红光/远红光配比处理与对照相比,大豆幼苗株高分别降低和增加,茎粗则相反。而根长、地上生物量、地下生物量及根冠比在红光/远红光配比处理下最低,与白光和红光/蓝光配比处理相比差异极显著(P<0.01),但白光和红光/蓝光配比处理间差异不显著(P>0.01)。叶面积和叶绿素含量在红/远红光配比处理下分别最低和最高,而两个大豆品种的净光合速率(Pn)、气孔导度(Gs)和PSII实际光化学量子产额(ΦPSⅡ)均在红光/蓝光处理下最高,而非光化学猝灭系数(NPQ)最低。两个大豆品种的胞间CO2浓度(Ci)、蒸腾速率(Tr)、PSⅡ原初光能转化效率(Fv/Fm)、PSⅡ潜在活性(Fv/Fo)在各处理间规律不明显。In this study, three treatments of white light （CK）, red/blue ratio =0.8, and red/farred ratio = 0.6 were set for simulating effects of different light qualities on the physiology and photosynthetic characteristics of soybean seedlings in maize/soybean relay intercropping conditions. Gongxuan 1 and Guixia 3 of soybean varieties were chosen as material. The morphology and photosynthetic physiological parameters of soybean seedlings under different light quality were analyzed. The results showed that soybean seedlings height were decreased and increased in red / blue treatment and red / far - red treatment compared with CK, respectively. And the opposite result was observed in stem diameter. Root length, above ground biomass, below ground biomass and shoot ratio of soybean seedlings in the red / far - red treatment were decreased significantly compared with the white and red / blue treatment （ P 〈 0. 01 ）, but there was no difference of these paraments in white and red / blue treatment. The values of leaf area and photosynthetic pigment concentration in red / far red treatment appeared minimum and maximum respectively. In addition, The maximum values of net photosynthetic rates （ Pn）, stomatal conductance （Gs） and ac- tual photochemical quantum yield of PSII （ ФPS Ⅱ ） of two soybean varieties appeared in the blue / red treatment. However, there were no obvious regulation of intercellular CO2 concentration （Ci）, transpiration rate （Tr）, PS 1/ photochemical transformation efficiency （Fv / Fm）, PS Ⅱ potential activity （Fv/Fo） among different treatments.

关 键 词：大豆 红光 远红光 蓝光 光质 生长 

分 类 号：S565.101[农业科学—作物学]