施钼对黑果枸杞幼苗生长及荧光参数的影响  

Effects of Molybdenum Application on Growth and Fluorescence Parameters of Lycium ruthenicum Seedlings

作　　者：聂必林 田中平 巫利梅 如马南木·尼合买提 吕海英[1,2,3] NIE Bilin;TIAN Zhongping;WU Limei;NIGMAT Rumanam;LYU Haiying(College of Life Science,Xinjiang Normal University,Urumqi 830053,China;Key Laboratory of Plant Stress Biology in Arid Land,Urumqi 830054,China;Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology,Urumqi 830054,China)

机构地区：[1]新疆师范大学生命科学学院,新疆乌鲁木齐830053 [2]干旱区植物逆境生物学实验室,新疆乌鲁木齐830054 [3]新疆特殊环境物种保护与调控生物学实验室,新疆乌鲁木齐830054

出　　处：《广东农业科学》2021年第7期24-31,共8页Guangdong Agricultural Sciences

基　　金：新疆维吾尔自治区高校科研计划项目(XJEDU2019Y034);新疆维吾尔自治区重点实验室招标课题(XJDX1414-2018-03);新疆师范大学优秀青年教师科研启动基金(XJNU201509);国家自然科学基金(31560058,31901096)。

摘　　要：【目的】研究不同施钼浓度对黑果枸杞幼苗生长及荧光参数的影响,初步确定促进黑果枸杞幼苗生长的最适施钼浓度,为黑果枸杞小浆果产业发展提供一定的基础理论参考。【方法】以黑果枸杞幼苗为研究对象,采用水培种植试验,探究不同施钼浓度下黑果枸杞幼苗根长、株高、生物量、微量元素含量及荧光参数指标变化。【结果】(1)随钼处理浓度升高,黑果枸杞幼苗各部位生物量(鲜重和干重)、根长及株高均呈现先升后降的变化趋势。钼浓度为5、10、20μmol/L时对黑果枸杞幼苗各项生长指标具有显著促进作用,以10μmol/L综合促进效果最佳,钼浓度为40μmol/L时则产生抑制作用。(2)施钼对微量元素Mo、Zn、Fe的吸收具有明显影响,对Mo元素的吸收利用表现为协同关系,对Zn元素表现为拮抗关系,对Fe元素表现为拮抗和协同双重关系,施钼浓度在10μmol/L时黑果枸杞幼苗各部位对微量元素Mo、Zn、Fe吸收利用效率较为稳定。(3)黑果枸杞幼苗初始荧光(Fo)随施钼浓度升高呈现先降后升的变化趋势,在钼处理浓度为10μmol/L时有最小值。最大荧光产量(Fm)、最大光化学效率(Fv/Fm)及实际光化学效率(ΦpsⅡ)的变化趋势与Fo相反,在钼处理浓度为5μmol/L或10μmol/L时有最大值。【结论】黑果枸杞幼苗生长与施钼浓度之间具有明显的相关性,适宜的施钼浓度能显著提高黑果枸杞幼苗的生长,浓度过高又会抑制其生长。适合黑果枸杞幼苗生长的钼浓度范围为5-20μmol/L,以10μmol/L最佳。【Objective】The study was carried out to explore the effects of different molybdenum(Mo)concentrations on the growth and fluorescence parameters of Lycium ruthenicum seedlings,and to preliminarily determine the optimal Mo concentration to promote the growth of L.ruthenicum seedlings,which provided a certain basic theoretical reference for the development of small berry industry.【Method】Taking L.ruthenicum seedlings as the research object,hydroponic planting experiments were conducted to explore the changes in root length,plant height,biomass,trace elements content and fluorescence parameters of L.ruthenicum seedlings under different Mo concentrations.【Result】(1)With the increase of Mo concentration,the biomass,root length and plant height of all the parts of L.ruthenicum seedlings showed a trend of first increasing and then decreasing.The Mo concentrations of 5,10 and 20μmol/L could significantly promote the various growth indicators of L.ruthenicum seedlings,and the Mo concentration of 10μmol/L had the best comprehensive promotion effect;when the Mo concentration was 40μmol/L,it had an inhibitory effect;(2)Mo application had a significant effect on the absorption of trace elements Mo,Zn and Fe,and the absorption and utilization of Mo element was synergistic,that of Zn was antagonistic,and that of Fe was antagonistic and synergistic.When Mo concentration was 10μmol/L,absorption and utilization efficiency of each part in ruthenicum seedlings was relatively stable to trace elements Mo,Zn and Fe;(3)With the increase of Mo concentration,the initial fluorescence(Fo)of L.ruthenicum showed a trend of first decreasing and then increasing,and there was a minimum value when the Mo concentration is 10μmol/L.The trend of maximum fluorescence yield(Fm),maximum photochemical efficiency(Fv/Fm)and actual photochemical efficiency(ΦPSⅡ)was opposite to that of Fo,and there was a maximum when the Mo concentration was 5μmol/L or 10μmol/L.【Conclusion】There is an obvious correlation between the growth of L.ruth

关 键 词：黑果枸杞 钼肥 幼苗生长 荧光参数 微量元素 

分 类 号：S567.19[农业科学—中草药栽培] Q949.95[农业科学—作物学]