摘要
红橘花蜜腺环状 ,绕于上位子房基部 ,属于花盘蜜腺 .花盘所有细胞构成蜜腺 .蜜腺由分泌表皮、产蜜组织维管束组成 .据组织发生及维管束来源推测 ,花盘蜜腺是雌雄蕊基部共同起源的 .在蜜腺组织的发育过程中 ,淀粉粒和液泡呈现有规律的变化 .开花泌蜜前 ,淀粉粒急剧增大 ,通过泌蜜 ,淀粉粒由大变小 ,最后消失 .维管束伸入产蜜组织距表皮 7- 10层细胞处 .维管束末端只有韧皮部 .产蜜组织细胞 30 - 5 0层没有胞间隙 ,上方 14- 2 0层与下方细胞稍有不同 ,分泌表皮上气孔数量少且正常 .蜜汁可能由产蜜组织细胞通过由细胞壁组成的非共质体途径 ,也可能经共质体途径到达分泌表皮细胞外壁与角质层之间 .在内压作用下 。
The development and structure of the floral nectary of Citrus reticulata cv.Tangerine was examined. The disc nectary was at the base of ovary. All cells of the disc composed the nectary. The nectary was differentiated into an secretory epidermis, secretory tissue and vascular bundles, and originated from the base of pistil primordia and stamen primordia. During the development of nectariferous tissue, starch grains and vacuole changed regularly. Before anthesis, the size of starch grains increased rapidly. They became smaller and smaller and then disappear at last as nectar was secreted. Vascular bundles stretched into secretory tissue and reached at the depth of 7th-10th layers of cells beneath epidermis. They contained phloem only besides the small basical section. The secretory tissue possessed no intercellular spaces on 30th-50th layers and the epidermis possessed few normal stomata on outer 14th-20th layers. The nectar got to the spaces between the cuticle and the outside cell wall of the epidermis through the apoplast which was composed of cell wall or through the symplast pathway. Then it exuded out through the thin cuticle as the pressure increased.
出处
《福建农业大学学报》
CSCD
北大核心
2001年第3期427-432,共6页
Journal of Fujian Agricultural University
关键词
红橘
花蜜腺
发育解剖
Citrus reticulata
nectary
developmental anatomy
