寡毛双眉虫无性生殖期间的皮膜演化和细胞发生学

于１９９１年６月在青岛海区采集到一腹毛目纤毛虫,寡毛双眉虫。应用蛋白银技术研究了其无性生殖期间的细胞发生学,其特征为：１）ＡＺＭ原基独立地出现于远离模棘毛的前方而非紧靠老的横棘毛附近;２）口棘毛并非来自第一ＦＶＴ原基（在后仔虫）,而是由ＵＭ原基分化而来;３）老的ＡＺＭ将发生后半群的局部重建而非整个地由前仔虫简单继承。

CORTICAL EVOLUTION AND MORPHOGENESIS OF DIOPHRYS OLIGOTHRIX BORROR, 1965 DURING ASEXUAL REPRODUOING CYCLE

Morphogenetic events during division of the marine hypotrichous ciliate Dioph-rys oligothrix (Borror,1965) from coast of Qingdoo in 1991 were investigated bylight microscopy on protargol-impregnated specimens.The morphogenesis of bothtlie ventral and dorsal infraciliature proceeds in a very similar way to that in D.scutum.The opisthe oral primordium (OP),which develops in a subsurface pouch,forms de novo anterior to the parental transverse cirri.Basal bodies formed in theOP field are not contributed to any other cirral anlagen.Only the rear part of theparental adoral zone of membranelles (AZM) appeared to be reorgllized during thelater morphogenetic process and then was inherited by the proter.Both the endoraland paroral membrane (UM) develop from an "extra" anlage which derives from theposterior end of the reorgnized AZM in the proter and from the oral primordiumin the opisthe. All cirral anlagen also form de novo and do not develop in associa-tion with any parental structures.Each of the 4 dorsal kineties evolves from a se-parate dorsal kinety anlage in both proter and opisthe.The replication band at thedistal end of each macronucleus proceeds anteriorly and disappears as the two nucle-ar segments fuse. This investigation documents several ontogenetic differences among the speciesof the geneus Diophrys.The morphogenetic process in our population differs fromthat in D.scutum in the position of the oral primordium which is distinctly ante-rior to the transverse cirri and between the marginal cirri, the reorgnization of theparental AZM is limited merely to the last 1/3 of its length and is relatively inco-nspious.In contrast to the previous report,the origin of the UM and paroral cirr-us in both proter and opisthe is apparently connected with the "existing" oral prim-ordium (in opisthe) or reorganizing part of parental AZM and UM (in proter).