The blepharoplast ofHypnum
作者:
DuckettJeffrey G.,
RenzagliaKaren S.,
期刊:
Journal of Bryology
(Taylor Available online 1986)
卷期:
Volume 14,
issue 2
页码: 375-385
ISSN:0373-6687
年代: 1986
DOI:10.1179/jbr.1986.14.2.375
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractUltrastructural analyses of mid-stage spermatids ofHypnum jutlandicumandH. mammillatumreveal a maximally structured blepharoplast closely similar in most respects to the other moss taxa previously investigated. The multilayered structure is four-layered and the dimorphic basal bodies highy staggered. The latter are inserted into the gamete in a slightly staggered subapical position. Both are longer than those reported for the majority of mosses and hepatics. Like other true mosses, the posterior basal body diverges from the longitudinal axis of the spermatid and is associated with a solitary microtubule which is equally divergent from the main body of the spline. In contrast to previous reports on other mosses, the stray microtubule ofHypnumis here interpreted as remaining separate from the spline, i.e., it does not converge posteriorly with the body of the spline.The lamellar strip ofHypnumis roughly oblong in outline with an acute anterior tip which extends beyond the spline microtubules both anteriorly and on the righthand side. The posterior margin of the lamellar strip rapidly tapers from right to left. Like most mosses, the lamellar strip is approximately the same length as the anterior basal body and terminates at the level of the anterior basal body transition zone. In hepatics, in contrast, the lamellar strip subtends the posterior basal body over most of its length.
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