苯丙烯酸对黄瓜幼苗光合作用和细胞超微结构的影响

Effects of Cinnamic Acid on Photosynthesis and Cell Ultrastructure of Cucumber Seedlings

通过基质栽培研究不同浓度的苯丙烯酸对黄瓜幼苗光合作用和超微结构的影响。结果表明,苯丙烯酸浓度在80μmol·L-1时显著地降低了黄瓜幼苗的叶面积、叶绿素a含量、光合速率、蒸腾速率、根系活力和气孔张开数(P<0.05);叶绿体和线粒体等超微结构也受到破坏,而浓度在150μmol·L-1时显著减少了全株干质量和气孔总数,细胞器出现解体现象。

The influence of cinnamic acid at different concentrations (0, 80, 150 μmol · L ) on leaf gas exchange and cell ultrastructure of cucumber seedlings was investigated in substrate culture. Resulted showed that the cinnamic acid at 80 μmol · L-1 significantly reduced the leaf-area, the content of chlorophyll a, the photosynthesis rate, the respiratory rate, the activity of root and the opening number of stomata, accompanied by a deformation of the ultrastructures of chloroplast, mitochondrion. More significant effects were observed at a 150 μmol · L cinnamic acid treatment. All these showed that cinnamic acid significantly influenced the photosynthesis by reducing the activity of root, function of the chloroplast and mitochondrion, stomata operation.