NEURONS AND IDENTIFIED GLOMERULI OF ANTENNAL LOBES DURING POSTEMBRYONIC DEVELOPMENT IN THE COCKROACH BLABERUS-CRANIIFER BURM - (DICTYOPTERA, BLABERIDAE)
NEURONS AND IDENTIFIED GLOMERULI OF ANTENNAL LOBES DURING POSTEMBRYONIC DEVELOPMENT IN THE COCKROACH BLABERUS-CRANIIFER BURM - (DICTYOPTERA, BLABERIDAE)
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DOI：
10.1016/0020-7322(85)90055-8
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发表时间：
1985-01-01
期刊：
影响因子：
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通讯作者：
ROSPARS, JP
中科院分区：
文献类型：
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作者：
CHAMBILLE, I;ROSPARS, JP
本文从神经元和肾小球两个层面对小蠊触角叶的胚胎后发育进行了研究。下脑神经元的数量大致恒定（340 +-）。50，源于核计数)。它们聚集在两组，分别占细胞的80%和20%，在发育过程中位置略有不同。肾小球的补体也几乎是恒定的(106。1）. 在形态学上鉴定的23个肾小球显示了它们的个体发生稳定性。此外，几乎所有在成人中发现的肾小球都是在发育中期（L5期）根据其相对位置确定的；只有3个成人肾小球和1个L5肾小球不匹配。L5叶的定量研究表明，大多数同源肾小球具有相同的位置和大小。肾小球在不同叶中的位置不相同的比例（20%）在L5期和成虫期是相等的，这表明在孵化时已经存在位置变异性，并且在胚胎后发育期间不会增加。然而，L5脑叶不是成人脑叶的比例模型。首先，12%的肾小球在这两个阶段之间移位（即四分之一在L1和成人之间），这是根据一个精确的时空发育模式。其次，肾小球的大小在L5和成人之间没有很好的相关性：例如，一个小的成人肾小球可能对应一个大的若虫肾小球。第三，早在孵化时就发现的肾小球106在若虫中不是两性二态的，而只在成虫中（雄性大肾小球）。
The postembryonic development of antennal lobes was examined at the neuronal and glomerular levels in the cockroach, Blaberus cranifer (Dictyoptera: Blaberidae). The deutocerebral neurons are approximately constant in number (340 .+-. 50, as derived from nuclear counts). They are congregated in 2 groups, containing respectively 80% and 20% of cells, which slightly vary in location during development. The complement of glomeruli is also almost constant (106 .+-. 1). Their ontogenetic stability is shown by 23 glomeruli that were identified morphologically at all stages. Moreover, almost all glomeruli found in the adults were identified at mid-development (stage L5) according to their relative locations; only 3 adult and one L5 glomeruli were unmatched. A quantitative study of L5 lobes showed that most of the homologous glomeruli have the same location and size. The proportion of glomeruli, which are not identically located in different lobes (20%), is equal at L5 and adult stages, suggesting that the positional variability is already present at hatching and does not increase during postembryonic development. However, L5 lobes are not scale models of adult lobes. First, 12% of glomeruli are displaced between these 2 stages (i.e. one-fourth between L1 and adults) according to a precise spatiotemporal pattern of development. Second, the glomerular sizes are not well correlated between L5 and adults: e.g. a small adult glomerulus may correspond to a bulky nymphal one. Third, glomerulus 106, identified as early as hatching, is not sexually dimorphic in nymphs but only in adults (male macroglomerulus).