Liddle L B, Neushul M
Department of Biological Sciences, University of California, Santa Barbara, California 93106.
J Phycol. 1969 Mar;5(1):4-12. doi: 10.1111/j.1529-8817.1969.tb02568.x.
The development of spores and eggs of Zonaria farlowii was studied with light and electron microscopy. Oogonia require a lunar month to develop and are produced in periodic crops. The sporangia, on the other hand, are longer in developing and on a particular plant do not become mature all at the same time. Differences in size, content, and products of sporangia and oogonia have been found. One of the quantifiable differences is in the amount of osmiophilic substance, presumably oil, present in the 2 cells. This substance is more abundant in the sporangium, a cell which produces 8 reproductive spores. These differences are particularly interesting since the embryology of sporic and zygotic germlings has been found to be identical, while ontogeny of spores and eggs differs. The findings of this study are discussed in view of possible relationships between microstrtrclitral features of spores and fertilized eggs and their subsequent development.
利用光学显微镜和电子显微镜对法氏带藻的孢子和卵的发育进行了研究。卵原细胞需要一个农历月来发育，并以周期性的作物形式产生。另一方面，孢子囊发育时间更长，在特定植物上不会同时成熟。已发现孢子囊和卵原细胞在大小、内容物和产物方面存在差异。其中一个可量化的差异在于两个细胞中嗜锇性物质（可能是油）的含量。这种物质在孢子囊中更为丰富，孢子囊是产生8个生殖孢子的细胞。这些差异特别有趣，因为已发现孢子体和合子幼体的胚胎学是相同的，而孢子和卵的个体发育却不同。鉴于孢子和受精卵的微观结构特征与其后续发育之间可能存在的关系，对本研究的结果进行了讨论。
