Investigations of body scales in twelve Heterocapsa species (Peridiniales, Dinophyceae), including a new species H-pseudotriquetra sp nov.
Investigations of body scales in twelve Heterocapsa species (Peridiniales, Dinophyceae), including a new species H-pseudotriquetra sp nov.
复制标题
DOI：
10.2216/i0031-8884-43-4-394.1
复制
发表时间：
2004-07-01
期刊：
影响因子：
1.6
通讯作者：
Fukuyo, Y
中科院分区：
文献类型：
--
作者：
Iwataki, M;Hansen, G;Fukuyo, Y
12 个 Heterocapsa 物种的体鳞，包括一个新种 H.pseudotriquetra Iwataki, Gert Hansen & Fukuyo, sp.。十一月通过透射电子显微镜进行研究，以澄清超微结构的差异。所有物种都有鳞片，其体鳞结构由三放射状基底板和由垂直直立的立柱或脊椎和水平杆组成的三维结构组成。这种基本尺度结构被认为是通用特征。更精细的细节，例如底板上中心孔的形状和存在、立柱、杆和刺的数量，被认为是物种特异性的。在 H. arctica 和 H. circular-isquama 的克隆培养物中发现了两种类型的鳞片，这表明它们代表了“成熟”和“不成熟”的体鳞。还观察到基底板“网状结构”的种内变异。这种变异在 H. horiguchii 和 H. rotundata 的长期培养中尤其明显。可以区分所描述的 11 个物种的体鳞结构。然而，H. triquetra 和 H.pseudotriquetra 这两个物种具有相同的鳞片形态，并通过细胞形状和 LSU rDNA (25S rDNA) 序列的差异来区分。
The body scales of 12 Heterocapsa species including a new species, H. pseudotriquetra Iwataki, Gert Hansen & Fukuyo, sp. nov. were investigated by transmission electron microscopy to clarify ultrastructural differences. All species had scales with a body-scale structure consisting of a triradiate basal plate and a three-dimensional construction composed of vertically standing uprights or spines and horizontal bars. This basic scale structure is considered to be a generic characteristic. Finer scale details such as the shape and presence of a central hole in the basal plate, the numbers of uprights, bars and spines are considered to be species-specific. Two types of scales were found within clonal cultures of H. arctica and H. circular-isquama and it is suggested that these represent 'mature' and 'immature' body scales. Intraspecific variation of the basal plate 'reticulation' was also observed. This variation was particularly evident in prolonged cultures of H. horiguchii and H. rotundata. The body-scale structure of 11 described species can be distinguished. However, two species, namely H. triquetra and H. pseudotriquetra, have the same scale morphology and are distinguished by differences in cell shape and LSU rDNA (25S rDNA) sequences.