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Position: Home > Articles > Effects of Silicon on Chlorophyll Fluorescence Parameters, Photosynthetic Characteristics and Mineral Element Absorption of Watermelon Leaves Tianjin Agricultural Sciences 2020 (4) 11-14

硅元素对西瓜生理特征及矿质元素积累的影响

作  者:
秦伟;刘震;陈昆;韩同进
单  位:
关键词:
硅素;叶绿素荧光;光合能力;元素吸收;西瓜
摘  要:
为研究西瓜对硅的生理响应特征,以西瓜品种‘黑将军’为试验材料,通过营养液沙培的方式,研究5个硅水平(0,0.5,1.2,2.2和4.0 mmol·L-1)对西瓜幼苗叶绿素荧光参数、光合色素及矿质元素吸收特性的影响。结果表明:在0~2.2 mmol·L-1范围内,硅可以促进西瓜幼苗叶片Fv/Fm、Fv/Fo、φPSⅡ和qP值的增加,而在4.0 mmol·L-1时上述指标降低。随硅浓度(0~4.0mmol·L-1)的增加,叶片净光合速率胞间CO2浓度和气孔导度表现先升高后降低的变化趋势,且在2.2 mmol·L-1时值最大,较对照分别提高19.45%,55.29%和29.12%,与对照差异均极显著(P<0.01),而蒸腾速率表现出与净光合速率负相关的关系。硅浓度0~0.5 mmol·L-1时,对Mg、Ca元素的吸收有促进作用;硅浓度1.2~4.0 mmol·L-1时,不利于西瓜叶片对Ca、Mg元素的吸收;0.5~4.0mmol·L-1的硅浓度不利于叶片对Fe、Mn元素的吸收积累。
译  名:
Effects of Silicon on Chlorophyll Fluorescence Parameters, Photosynthetic Characteristics and Mineral Element Absorption of Watermelon Leaves
作  者:
QIN Wei;LIU Zhen;CHEN Kun;HAN Tongjin;Shangqiu Academy of Agricultural and Forestry Sciences;
关键词:
silicon;;chlorophyll fluorescence;;photosynthetic capacity;;element absorption;;watermelon
摘  要:
In order to study the physiological response characteristics of watermelon to silicon, the effects of five silicon levels(0, 0.5,1.2, 2.2 and 4.0 mmol·L-1) on chlorophyll fluorescence parameters, photosynthetic pigment and mineral element absorption characteristics of watermelon seedlings were studied by means of nutrient solution sand culture. The results showed that in the range of 0~2.2 mmol·L-1, silicon could promote the increase of Fv/Fm, Fv/Fo, φ PSII and qP values in watermelon seedling leaves, but at 4.0 mmol·L-1, the above indexes decreased. With the increase of silicon concentration(0~4.0 mmol·L-1), the net photosynthetic rate and stomatal conductance of leaves increased first and then decreased, and the highest values were found at 2.2 mmol·L-1, which were19.45%, 55.29% and 29.12% higher than those of the control, with significant differences between the two groups(P<0.01), while the transpiration rate showed a negative correlation with the net photosynthetic rate. When silicon concentration was 0~0.5 mmol·L-1, it can promote the absorption of Mg2+and Ca2+; when silicon concentration was 1.2~4.0 mmol·L-1, it was not conducive to the absorption of Ca2+and Mg2+; when silicon concentration was 0.5~4.0 mmol·L-1, it was not conducive to the absorption and accumulation of Fe and Mn.

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