Studies onTimmiella barbuloides(Brid.) Moenk., IV. SEM and TEM characterization of spore wall and first germination stages
作者:
CastaldoR.,
GiordanoS.,
CafieroG.,
期刊:
Journal of Bryology
(Taylor Available online 1982)
卷期:
Volume 12,
issue 2
页码: 273-278
ISSN:0373-6687
年代: 1982
DOI:10.1179/jbr.1982.12.2.273
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractThe spore wall morphology ofTimmiella barbuloides(Pottiales, Musci) is described. The spores are catalept, with an ornamentation pattern consisting of unevenly spaced, shortly pedunculated pilum-and gemma-like processes. The spore coat consists of three, unevenly thick layers: intine, exine, and perine. The exine is not involved in wall ornamentation, the processes consisting of perine only. The leptoma, a spore coat area involved in germination, consists of an intine markedly thickening in an area of thinning exine and, outside, with a spore coat area where perinous processes become sparse. On the basis of observations and of the data reported in recent literature the classical definition of the leptoma is modified. It is considered to be a structurally specialized, but not necessarily thin, area.
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