摘要
荔枝花蜜腺呈盘状,位于子房和花萼之间的花托上。花盘蜜腺由表皮、产蜜组织、维管束组成。蜜腺的原始细胞由花托表面的 2～3 层细胞脱分化产生。成熟蜜腺产蜜组织细胞含有淀粉粒,为淀粉型蜜腺,表皮细胞内无淀粉粒。产蜜组织出现分化:PAS 反应颜色深的细胞成网状分布,与表皮下方的 1～2 层细胞相连,构成蜜汁的运输通道;颜色浅的细胞分布于网眼处。蜜腺表皮上的角质层波状皱折,有泌蜜孔。表皮毛主要起保护作用,大部分蜜汁通过泌蜜孔排出。
The floral nectary in Litchi chinensis is a disc nectary located between calyx and ovary on receptacle. The nectary is composed of epidermis nectariferous tissue and vascular bundles. The nectary originates from the outer 2～3 layers cells of receptacle. The nectariferous tissue contains starch grains. It belongs to starch nectary, but the epidermal cell contains no starch grains. The nectariferous tissue is differentiated as PAS reaction, the dense cells distribute by a net and make up the nectar passage. The pale cells distribute in the mesh. The surface of nectary is covered by a cuticle with ripply sculpture and there are spores in it. The trichomes mainly play a protective role. Most nectar exudes out through the pores in cuticle.
出处
《亚热带植物科学》
2004年第3期7-11,共5页
Subtropical Plant Science
关键词
荔枝
花蜜腺
发育
解剖
Litchi chinensis
floral nectary
development
anatomy
