Kozieradzka-Kiszkurno Małgorzata
Uniwersytet Gdański.
Postepy Biochem. 2021 Nov 4;68(1):38-45. doi: 10.18388/pb.2021_406. Print 2022 Mar 31.
The suspensor in the majority of angiosperms is an evolutionally conserved embryonic organ functioning as a conduit that connects ovule tissues with the embryo proper for nutrients and growth regulators flux. In this article the present knowledge on the embryo-suspensor ultrastructure and function in representatives of Crassulaceae genera: Sedum, Jovibarba, Sempervivum, Aeonium, Monanthes, Aichryson and Echeveria. The role of the suspensor in the transport of nutrients from the tissues of the ovule to the proper embryo is confirmed by the structure of the basal cell, especially the nature of the micropylar part of its wall, the "transfer wall". The basal suspensor cell is a site of intense metabolic activity. The special attention is paid to the plasmodesmata. The correlation between types of suspensors and structure of plasmodesmata was investigated. Final conclusions are given and the presented data summarized.
在大多数被子植物中，胚柄是一个进化上保守的胚胎器官，其功能是作为一个管道，将胚珠组织与胚本身连接起来，以实现营养物质和生长调节物质的流动。本文介绍了景天科植物属（景天属、长生草属、长生草属、莲花掌属、魔南景天属、爱染草属和拟石莲花属）代表植物中胚柄的超微结构和功能的现有知识。胚柄在将胚珠组织中的营养物质运输到胚本身的过程中的作用，通过基细胞的结构，特别是其壁的珠孔部分即“转移壁”的性质得到证实。基部胚柄细胞是强烈代谢活动的场所。特别关注了胞间连丝。研究了胚柄类型与胞间连丝结构之间的相关性。给出了最终结论并总结了所呈现的数据。
