摘要
越夏番茄生长过程中,根系活力及叶片叶绿素含量逐渐增加,但生长前期露地栽培的根系活力低于遮荫栽培和间作栽培,而结果期则显著高于间作栽培,叶绿素含量则始终以露地栽培为高。夏季高温季节叶片的膜脂过氧化较为严重,中午前后的MDA含量较高,但遮荫栽培和间作栽培可显著降低膜脂过氧化程度;番茄叶片的SOD活性在上午逐渐增强,下午维持较高水平。高温季节番茄叶片的光合速率因不同栽培方式而异,上午以露地栽培为高,但午休较为严重,中午后以遮荫栽培显著高于露地栽培和间作栽培;遮荫栽培番茄叶片的光化学效率中午下降的幅度显著低于露地栽培,说明其光抑制程度较小。
During growth of over-summer tomato, the content of chlorophyll in leaves and the root activity of tomato increased stage by stage. Root activity of tomato cultured in the open was lower at early growth stage, but the result was opposite at fruiting stage, and the chlorophyll content of tomato cultured in the open was kept higher level at the whole growth stage. The contents of malondialdehyde (MDA), a product of membrane-lipid peroxidation in tomato leaves in summer was higher at noon. But the level of membrane-lipid peroxidation of tomato cultured with maize and under shading was lower than in the open. SOD activity increased at morning gradually, and kept a high level at afternoon. At summer, the photosynthetic rate was different with the different cultural manner, that of tomato cultured in the open was higher than cultivation with maize and under shading at morning, but the noon depression was serious, and after noon the result was opposite. The Fv/Fm of tomato cultured under shading was decreased less than in the open at noon, this manifested photo-inhibition of photosynthesis of tomato cultured under shading was less.
出处
《西北农业学报》
CAS
CSCD
2004年第3期103-106,共4页
Acta Agriculturae Boreali-occidentalis Sinica
基金
山东省科技攻关计划(991020404)项目
