摘要
1987-1988年对福建香蕉主栽品种天宝蕉、台湾蕉和柴蕉的叶片组织细胞结构进行观察和若干生理指标测定.结果表明耐寒性较强的柴蕉叶片角质层细胞层数较多,角质层厚度+栅状组织厚度/叶片厚度比天宝蕉和台湾蕉高,但海绵组织厚度/叶片厚度则较低.前者叶片膜脂不饱和脂肪酸含量、不饱和脂肪酸指数、越冬前淀粉含量、越冬期可溶性糖、束缚水含量以及束缚水/自由水比值均高于后两者.供试3个栽培品种的耐寒力为柴蕉>天宝蕉>台湾蕉.叶片组织细胞结构和上述生理指标可作为鉴别香蕉耐寒力的指标.
The tissue structure in leaves of 3 major banana cultivars(Tianbao,Taiwan and Chaijiao)in Fujian Province was observed and their biochemical characteristics were tested during 1987-1988.The results showed that the number of layer in cuticle cell,thickness of (cuticle+palisade)/mesophyll in the leaves of Chaijiao,a cold tolerance cultivar,were higher than those of Tianbao and Taiwan,but thickness of spongy/mesophyll of the former was lower than the laters.The content of unsaturated fatty acids,index of unsaturated fatty acids, starch content before overwintering,soluble sugar content,percentage of bound water and bound water/free water ratio during overwintering period in the former were higher than those in the laters.The order of cold tolerance of 3 major banana cultivars was Chaijiao, Tianbao and Taiwan.The tissue structure in leaf and above biochemical characteristics may be the criteria of cold tolerance of banana.
关键词
香蕉
叶片
细胞结构
生理特性
banana
leaf
cell structure
biochemical characteristics
cold tolerance
