摘要
以"章姬"草莓为试验材料,研究喷施不同浓度的纳米SiO2(0、100、300、500 mg·L^-1)对草莓光合特性的影响,比较不同浓度纳米SiO2处理下草莓的光合-光响应、CO2响应曲线和果实品质之间的差异。结果表明:各处理均能促进草莓最大净光合速率(Anmax)和光合能力(Pnmax)的提高,使光补偿点(LCP)、CO2补偿点(CCP)和光呼吸速率降低,初始羧化效率(α)和CO2饱和点(CSP)上升,增强草莓对环境的适应能力,其中300 mg·L^-1处理对草莓光合的促进作用最好。叶绿素荧光参数(ΦPSⅡ、Fv/Fm、qP)均在300 mg·L^-1浓度处理下最大,而Fv′/Fm′在100 mg·L^-1处理下最大,其它处理间差异不显著。喷施不同浓度的纳米SiO2处理均显著提高了果实可溶性固形物含量和可溶性糖含量,降低了可滴定酸含量,糖酸比显著高于对照,300 mg·L^-1处理最佳。300 mg·L^-1和500 mg·L^-1的纳米SiO2处理显著提高了维生素C含量。适量喷施纳米SiO2可以增强草莓对光的利用效率,改善光合性能,提高果实品质。
Zhangji’strawberry was used as experimental materials to study the effects of spraying different concentrations of nano-SiO2(0,100,300,500mg·L^-1)on photosynthetic characteristics of strawberries,and to compare the photosynthetic-light response curve,photosynthetic-CO2response curve quality response of strawberry under different concentrations of nano-SiO2.The results showed that each treatment could promote the maximum net photosynthetic rate(Anmax)and photosynthetic capacity(Pnmax)of strawberry.The light compensation point(LCP),CO2compensation point(CCP)and photorespiration rate decreased,the initial carboxylation efficiency(α)and CO2saturation point(CSP)increased,which enhanced the environmental adaptability of strawberry,300 mg·L^-1treatment had the best promoting effect on photosynthesis of strawberry.Chlorophyll fluorescence parameters(ΦPSⅡ,Fv/Fm,and qP)were all maximal under the treatment of 300 mg·L^-1,while Fv′/Fm′was the highest under the treatment of 100 mg·L^-1.There was no significant difference among other treatments.Spraying different concentrations of nano-SiO2significantly increased soluble solids content and soluble sugar content of fruits,reduced titratable acid content,sugar-acid ratio was significantly higher than control,and 300 mg·L^-1 treatment was the best.The treatment with300mg·L^-1 and 500mg·L^-1 of nano-SiO2significantly increased the vitamin C content.Therefore,proper application of nano-SiO2 could enhance the utilization efficiency of light and improve photosynthetic performance,and promote quality of strawberry.
作者
陈斌
胡云丽
詹平华
孟倩
李思亮
倪吾钟
CHEN Bin;HU Yunli;ZHAN Pinghua;MENG Qian;LI Siliang;NI Wuzhong(Tonglu Meteorological Bureau,Tonglu,Zhejiang 311500;Hangzhou Meteorological Bureau,Hangzhou,Zhejiang 310051;College of Environmental and Resource Science/Zhejiang University,Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment,Hangzhou,Zhejiang 310058;Hangzhou Lenong Agricultural Technology Co.Ltd.,Tonglu,Zhejiang 311500)
出处
《北方园艺》
CAS
北大核心
2020年第4期35-42,共8页
Northern Horticulture
基金
国家水体污染控制与治理科技重大专项资助项目(2014ZX07101-012)
国家重点基础研究发展计划资助项目(2013CB127403).
关键词
纳米SIO2
草莓
光合特性
品质
nano-SiO2
strawberry
photosynthetic characteristics
quality
