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以樱桃番茄(Solanum lycopersicum var.cerasiforme)品种‘Micro Tom’为试材,利用LED精量调制光源,设白光、红/蓝光(1:1)、红/蓝光(3:1)、红/蓝光(5:1)、红/蓝光(7:1)五个处理,以白光为对照,测定樱桃番茄幼苗株高,茎粗,壮苗指数,根系活力,可溶性糖、可溶性蛋白、叶绿素含量,光合、荧光参数,叶片结构等,研究300μmol?m~(-2)?s~(-1)光强下不同光质处理对樱桃番茄幼苗形态,生理、光合、荧光特性及叶片结构的影响。结果表明:红/蓝(7:1)处理的比叶面积最大;红/蓝(3:1)处理的壮苗指数最高,最有利于壮苗的培育;红/蓝(3:1)处理的樱桃番茄幼苗可溶性糖、可溶性蛋白含量和根系活力均最高,并且与其他处理之间差异显著;红/蓝(1:1)处理的叶绿素含量最高;红/蓝(3:1)处理的净光合速率最高,红/蓝(1:1)最低;红/蓝(3:1)处理的光系统Ⅱ(PSⅡ)单位反应中心(RC)吸收、捕获、电子传递能量的能力最强,较对照差异极显著;红/蓝(3:1)处理的栅栏组织和海绵组织细胞长度最大。因此,红/蓝(3:1)处理最有利于壮苗培育,处理后樱桃番茄品质较高,光合、荧光特性较强,叶片厚度较大。
The experiment was carried out with the light source of LED precision modulation using white light, red / blue light (1: 1), red / blue light (3: 1), red / blue light (5: 1) and red / blue light (7: 1). The white light was used as control to measure the plant height, stem diameter, seedling index, root vigor, soluble sugar, soluble protein, chlorophyll content, photosynthesis , Fluorescence parameters and leaf structure of cherry tomato seedlings were studied under different light intensities at 300 μmol? M -2 (-2)? S -1 for the morphological, physiological, photosynthetic, and fluorescence characteristics of leaves and their leaf structures. The results showed that the specific leaf area of red / blue (7: 1) treatment was the largest; the strong seedling index of red / blue (3: 1) treatment was the highest, The soluble sugar content, soluble protein content and root activity of cherry tomato seedlings were the highest, and the difference was significant with other treatments. The chlorophyll content of red / blue (1: 1) treatment was the highest, while that of red / blue The highest photosynthetic rate and the lowest red / blue (1: 1) ratio were observed. The ability to absorb, capture and electron transfer of PS Ⅱ was the highest in the red / blue (3: 1) The difference was significant. The cell length of palisade tissue and spongy tissue treated with red / blue (3: 1) was the largest. Therefore, red / blue (3: 1) treatment is the most conducive to strong seedling culture, cherry tomatoes treated with higher quality, photosynthetic, fluorescence characteristics, leaf thickness larger.