应用生态学报2018，Vol.29Issue(3)：883-890,8.DOI:10.13287/j.1001-9332.201803.021
花粒期光照对夏玉米光合特性和叶绿体超微结构的影响
Effects of light intensities after anthesis on the photosynthetic characteristics and chloroplast ultrastructure in mesophyll cell of summer maize (Zea mays L. )
摘要
Abstract
We examined the changes of photosynthetic characteristics and chloroplast ultrastructure in mesophyll cell of summer maize in response to different light intensities in the field,with the summer maize hybrid Denghai 605 as experimental material. Two treatments of both shading (S) and increasing light (L) from flowering to physiological maturity stage were designed,with the ambient sunlight treatment as control (CK). Under shading treatment,poorly developed thylakoid structure,blurry lamellar structure,loose granum,large gap between slices and warping granum were the major characteristics in chloroplast. Meanwhile,photosynthetic rate (Pn) ,transpiration rate,stomatal conductance,chlorophyll content,and actual photo-chemical efficiency (ΦPSII) decreased,whereas the maximal photochemical efficiency and non-photochemical quenching increased,which resulted in decreases in grain yield under shading treatment. However,a better development was observed in chloroplasts for L treatment,with the number of grana and lamellae increased and lamellae arranged compactly. In addition,Pn and ΦPSII increased under L treatment,which increased grain yield. The chloroplast arrangement dispersed in mesophyll cells and chloroplast ultrastructure was destroyed after shading,and then chlorophyll synthesis per unit leaf area and photosynthetic capacity decreased. In contrast,the number of grana and lamellae increased and lamellae arranged compactly after increasing light,which are beneficial for corn yield.关键词
夏玉米/遮阴/增光/产量/叶绿体超微结构Key words
summer maize/shading/increasing light/grain yield/chloroplast ultrastructure引用本文复制引用
高佳,崔海岩,史建国,董树亭,刘鹏,赵斌,张吉旺..花粒期光照对夏玉米光合特性和叶绿体超微结构的影响[J].应用生态学报,2018,29(3):883-890,8.基金项目
本文由国家自然科学基金项目(31671629)、国家现代农业产业技术体系建设项目(CARS-02-18)和国家重点研发计划项目(2017YFD0300304-02)资助 （31671629）
