春玉米穗位叶叶绿体超微结构对农田管理措施的响应

以春玉米为研究对象,利用透射电镜(TEM)对灌水、有机培肥和氮肥施用作用下的穗位叶叶绿体超微结构进行了表征.结果显示,随着灌水量、有机培肥量及施氮量增加,叶绿体的超微结构逐渐完整,被膜逐渐清晰,基质片层增加且排列规则,基粒垛叠变丰寓,且片层清晰,淀粉粒数量增加,嗜锇颗粒减少.与其他处理相比,灌水量每盆每天1 200 m...

Response of chloroplast ultrastructure of ear leaves of spring maize to field managements

Spring maize was selected as research object, and the characteristics of chloroplast ultrastructure of ear leaves were evaluated with scanning electron microscopy (SEM) as affected by irrigation, organic manure fertilization and nitrogen application. The results showed that with increasing irrigation amount, organic manure fertilization amount and nitrogen application amount, the chloroplast ultrastructure gradually became integrated, the membrane envelope of chloroplast became clear, the stroma lamellae increased and arranged regularly, the grana were clear and stacked increasingly, the starch particles increased and the osmiophilic grains decreased. Compared with other treatments, irrigation, organic manure fertilization and nitrogen application at a rate of 1200 milliliter per pot and per day, 4000 kilogram per mu and 23 kilogram N per mu could make the chloroplast ultrastructure show greater predominance. Compared with one topdressing, two topdressing and one deep application with control fertilizer made chloroplast become a more integrated membrane system. It was indicated that whether the chloroplast ultrastructure was normal was considered as an important index judging activities of plant cells, and reasonable field managements could make chloroplast ultrastructure of spring maize more stable, which was advantaged for high-efficiency production of spring maize.