| Cite this article: | 高尚,蔡丽萍,单长卷.硒代蛋氨酸对草莓光合特性及叶绿素荧光参数的影响[J].灌溉排水学报,0,():-. |
| GAO Shang,CAI LIPING,SHAN Changjuan.硒代蛋氨酸对草莓光合特性及叶绿素荧光参数的影响[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 2433Times Download 0Times |
|
|
|
| DOI： |
|
| Effects of selenomethionine on photosynthetic characteristics and chlorophyll fluorescence parameters of strawberry |
|
GAO Shang1, CAI LIPING2, SHAN Changjuan1
|
|
1.Henan Institute of Science and Technology,Xinxiang Henan;2.Luohe Vocational College of Food
|
| Abstract: |
| 【Objective】In order to determine the response of photosynthesis to exogenous organic selenium in strawberry leaves.【Method】 At large fruit period, color-changed period and mature period of "Sweet Charlie" strawberry, the effects of different concentrations of exogenous SeMet on photosynthetic pigment content, photosynthetic parameters and chlorophyll fluorescence parameters, total plant biomass and fruit sugar degree were studied by pot experiment and five treatment of SeMet concentration[CK(0mg/L SeMet), T1(10mg/L SeMet), T2(30mg/L SeMet), T3(60mg/L SeMet), T4(90mg/L SeMet)]. 【Result】The contents of Chla, Chlb, Chla+b and Car in strawberry leaves at each period were increased significantly by exogenous SeMet, and Chla/b was increased significantly by exogenous SeMet at color-changed period. The effects of each treatment on above indicators were generally arranged in the order of T3 >T2 >T4 >T1 > CK. Among different concentrations of exogenous SeMet, the effects of 60mg/LSeMet were the most significant. Compared with CK, 60mg·L-1 SeMet increased Chla content by 48.8%, 75.7% and 54.2% at large fruit period, color-changed period and mature period, respectively; Chlb content was respectively increased by 22.5%, 37.1% and 47.9%; Chla+b was respectively increased by 30.9%, 59.9% and 50.4%; Car was respectively increased by 31.9%, 24.1% and 33.7%. Exogenous SeMet also significantly incresaed Pn, Gs, Tr and WUE of the leaves, and the most significant treatment was 60mg·L-1 SeMet. Compared with CK, T3 increased Pn by 44.1%, 53.8% and 82.5% at large fruit period, color-changed period and mature period, respectively; Gs was respectively increased by 29.7%, 39.7% and 90%; Tr was respectively increased by 21.4%, 34.4% and 44%; WUE was respectively increased by 18.7%, 14.5% and 26.7%. At the same time, SeMet also had significant effects on chlorophyll fluorescence parameters. On the whole, the effects of each treatment were arranged in the order of T3 >T2 >T4 >T1 > CK. Among different concentrations of exogenous SeMet, the effects of 60mg·L-1SeMet were the most significant. Compared with CK, T3 increased Y(II) in each period by 22.5%, 16% and 20%, respectively; Fv/Fm was increased by 1.34%, 21.1% and 9.4%; Fv'/Fm' was increased by 28.9%, 9.5% and 20.9%; ETR was increased by 14.6%, 12.7% and 22.9%. qP was increased by 22.6%, 19.4 and 28.4%; NPQ was decreased by 35.6%, 27.7% and 51.6%. In addition, the total biomass and fruit sugar degree of strawberry in each period were significantly increased by SeMet, and the most significant effects were obtained by 60mg·L-1 SeMet. The correlation analysis showed that the photosynthetic rate of strawberry plants in each period was closely related with the total biomass and fruit sugar degree.【Conclusion】Exogenous 60 mg/L SeMet could improved leaf photosynthetic capacity and water use efficiency, as well as plant dry biomass accumulation and fruit sugar content. This finding indicated that 60 mg/L SeMet can be used to optimize the cultivation measures in the production of strawberry and achieve the improvement of fruit quality. |
| Key words: Strawberry;Selenomonine;Water use efficiency;Photosynthesis;Sugar;Total plant biomass |
|
|
|
|
|
|
