摘要
应用光学显微镜和扫描电镜对白兰(Michelia laba DC.)花开放过程中花被片结构的变化进行了观察,并与成熟叶片的结构特征进行了比较,对白兰成熟花被片与成熟叶片的一些数量特征进行了测量,探讨了白兰花香气形成、挥发部位及挥发途径的结构基础。结果表明:(1)根据在花被片开展的不同时期的颗粒状细胞内含物的数量、形态及存在部位,推测白兰花被片颗粒状细胞内含物可能主要是香气释放前体物质。(2)白兰花被片与成熟叶片的解剖结构存在差异,表明花被片与叶片香气释放机理不一致。白兰花被片挥发性香气的前体物在基本薄壁组织细胞中产生,通过扩散作用输送到表皮细胞,最后通过表皮细胞的垂周壁、表皮细胞的细胞间隙、气孔释放出来。
Variation in perianth structure during the blooming of Michelia alba DC. was observed by means of light microscope and scanning electronic microscope, the structures were compared between perianth and leaf in details, and some quantitative features in leaves and perianths were measured to explore structure base of aroma production, emission pattern and sites in Michelia alba DC.. The grain-like cell inclusions which varied in morphology, location and number during the different periods of unfolding of perianths of Michelia alba DC. can be infeH-ed to be a predecessor of aroma. Difference between the perianth and mature leaf in anatomic structure indicated they had different aroma emission mechanisms. Predecessor of aroma was produced in basic parenchyma cells of perianth, transported to epidermis cells through dispersion and then emitted from the intercelluar space, anticlinal wall and stomata of epidermis cells.
出处
《热带作物学报》
CSCD
2006年第4期34-40,共7页
Chinese Journal of Tropical Crops
关键词
白兰
开花
花被结构
香气释放
Michelia alba DC.
blooming
perianth structure
aroma emission
