纳米SiO_(2)对樱桃萝卜光合特性及叶绿素荧光参数的影响  

Effect of Nano-SiO_(2)on Photosynthetic Characteristics and Chlorophyll Fluorescence Parameters of Cherry Radish

作　　者：廖浩林 罗学刚[1,2] 牟茂 LIAO Hao-lin;LUO Xue-gang;MU Mao(School of Life Science and Engineering,Southwest University of Science and Technology,Mianyang,Sichuan 621010;Engineering Research Center of Biomass Materials,Ministry of Education Mianyang,Sichuan 621010)

机构地区：[1]西南科技大学生命科学与工程学院,四川绵阳621010 [2]生物质材料教育部工程研究中心,四川绵阳621010

出　　处：《安徽农业科学》2025年第4期32-35,92,共5页Journal of Anhui Agricultural Sciences

基　　金：四川省科技计划重点研究项目(2021YFN0625)。

摘　　要：以樱桃萝卜为试验材料,采用水培试验设计,通过根部灌施纳米SiO_(2)悬浊液的方法,研究不同浓度纳米SiO_(2)(0、50、100、200、400 mg/L)对樱桃萝卜叶片光合色素含量、光合特征参数和叶绿素荧光参数的影响。结果表明,根部灌施纳米SiO_(2)对樱桃萝卜的净光合速率(P_n)影响不显著,但对其气孔导度(G_(s))、蒸腾速率(T_(r))、胞间CO_(2)浓度(C_(i))有显著影响,尤其是在中高浓度时。光合色素即叶绿素和类胡萝卜素含量显著增加,但高浓度时有所下降。同时,添加纳米SiO_(2)对樱桃萝卜的叶绿素荧光参数PS II的最大光化学量子产量(F_(v)/F_(m))无明显影响,Y(II)(PS II的有效光量子产量)、ETR(相对光合电子传递速率)、qP(光化学荧光猝灭系数),qL(PS II天线色素光化学荧光猝灭系数)显著上升,在200 mg/L时最显著。qN(暗适应下光化学荧光猝灭系数)、NPQ(光照下非光化学荧光猝灭)无明显变化。研究结果表明,与对照组相比,添加纳米二氧化硅不会对樱桃萝卜光合系统产生胁迫。The effects of different concentrations of nano-SiO_2(0,50,100,200,400 mg/L)on photosynthetic pigment content,photosynthetic parameters and chlorophyll fluorescence parameters of cherry radish were studied by using the method of root irrigation of nano-SiO_(2)suspension in hydroponics experiment design.The results showed that the net photosynthetic rate(P_n)of cherry radish was not significantly affected by root irrigation with nano-SiO_2,but it had significant effects on stomatal conductance(G_s),transpiration rate(T_r)and intercellular CO_(2)concentration(C_i),especially at medium and high concentrations.The content of chlorophyll and carotenoids increased significantly,but decreased at high concentrations.At the same time,the addition of nano-SiO_(2)had no significant effect on the maximum photochemical quantum yield(F_v/F_m)of chlorophyll fluorescence parameter PS II,Y(II)(effective photoquantum yield of PS II),ETR(relative photosynthetic electron transfer rate),qP(photochemical fluorescence quenching coefficient),qL(PSII antenna pigment photochemical fluorescence quenching coefficient)of cherry radish significantly increased,and most significantly at 200 mg/L,qN(photochemical fluorescence quenching coefficient under dark adaptation),NPQ(non-photochemical fluorescence quenching under light)had no significant change.The results showed that compared with the control group,the addition of nano-silica did not stress the photosynthetic system of cherry radish.

关 键 词：纳米SiO_(2) 樱桃萝卜 水培 光合特征 叶绿素荧光参数 

分 类 号：S631.1[农业科学—蔬菜学]