期刊论文

Effect of Low Temperature Stress on Leaf Submicroscopic Structure and Chlorophyll Fluorescence Parameters of Cassava ‘F200’ Seedlings

中文

热带作物学报

1000-2561

2021

42

07

1925-1931

10.3969/j.issn.1000-2561.2021.07.015

财政部和农业农村部国家现代农业产业技术体系建设项目（No.CARS-11-HNSY）； 2020年度湖南省大学生创新创业训练计划项目（No.2406）；

本校为第一机构

为探究低温胁迫对木薯显微结构和光合效率的影响,对木薯耐寒品种‘F200’和常栽低温敏感型品种‘华南8号’(‘SC8’)在人工低温条件下进行4 ℃低温处理,观察处理前和处理3、6、12、24 h下幼苗叶片的扫描电镜、透射电镜及叶绿素荧光参数变化情况,并比较两品种间的差异。结果表明:(1)与‘SC8’相比,随着气温的降低‘F200’的叶片气孔会逐渐关闭且叶片蜡质形成自我保护机制;(2)低温胁迫状态24 h后,‘F200’叶肉细胞内细胞器仍维持工作状态,而‘SC8’叶肉细胞基本死亡;(3)2个品种最大叶绿素荧光强度下降且达到最大荧光所需时间均增加,‘F200’的最大荧光值高于‘SC8’;(4)低温胁迫下,‘F200’的各项...

In order to investigate the effects of low temperature stress on the microstructure and photosynthetic efficiency of cassava, cold resistant cassava variety ‘F200’ and low-temperature sensitive cassava variety ‘Huanan 8’ (‘SC8’) were treated at 4 under artificial low temperature condition. Scanning electron ℃ microscopy (SEM), transmission electron microscopy (TEM) and chlorophyll fluorescence parameters were observed before and after 3 h, 6 h, 12 h and 24 h treatment, and the differences between the two varieties were compared. The resu...