摘要
空气凤梨是一类特殊的气生无根类植物。选取了4个空气凤梨种(Tillandsia xerographica、T.streptophylla、T.velutina、T.tricolor),对其叶片表面解剖结构进行了研究。结果表明:(1)4种空气凤梨叶片表面都有鳞片覆盖,4个种鳞片的形状、覆盖形式、密度不同;(2)叶表皮细胞形态有差异,细胞形状有近四边形和近四边形且周壁浅波状2种,细胞大小各不相同;各品种均表现为上表皮无气孔,下表皮有气孔;(3)叶片解剖结构有表皮、叶肉组织、贮水组织、维管束及空腔,叶肉细胞无栅栏组织和海绵组织的分化;靠近上表皮或下表皮有大量贮水组织,且相邻维管束间有大而明显的空腔结构;(4)特殊的叶片结构与其气生方式和不同起源地的适应性密切相关。
Tillandsia belongs to the air,rootless plants. The leaf surface and anatomical structure of 4 Tillandsia species（ T. xerographica,T. streptophylla,T. velutina,T. tricolor） were studied. Results showed that：（ 1） Leaf surface of all the 4 varieties were covered with foliar trichomes,and shapes,cover forms and densities of foliar trichomes in 4 species were different.（ 2） The leaf epidermal cells were different in morphology. There were two cell shapes,near quadrangle and near quadrangle with peripheral wall. Cell sizes were not the same. There were no stomata on the upper epidermis,while had stomata on the lower epidermis.（ 3） The leaf anatomical structure included cuticular layer,palisade tissue,water storage tissue,vascular bundle and cavity,and no differentiation of palisade tissue and spongy tissue existed in mesophyll cells. A large amount of water storage tissue was near the upper surface or the lower surface,and there were big and obvious cavities between different vascular bundles.（ 4） The special leaf structure was closely related to the adaptability of the air grown and the different origins.
出处
《浙江农业学报》
CSCD
北大核心
2017年第6期959-965,共7页
Acta Agriculturae Zhejiangensis
基金
江苏农林职业技术学院面上项目(2014kj21)
关键词
空气凤梨
叶片结构
气生
适应性
air plant
leaf structure
air grown
adaptability
