A new green-tide-forming alga, Ulva ohnoi Hiraoka et Shimada sp nov (Ulvales, Ulvophyceae) from Japan
A new green-tide-forming alga, Ulva ohnoi Hiraoka et Shimada sp nov (Ulvales, Ulvophyceae) from Japan
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DOI：
10.1111/j.1440-1835.2003.00321.x
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发表时间：
2004-03-01
影响因子：
1.5
通讯作者：
Masuda, M
中科院分区：
文献类型：
--
作者：
Hiraoka, M;Shimada, S;Masuda, M
平冈石莼，新种（Ulvales Ulvophyceae）描述于日本南部和西部，其特征在于以下特征的组合：W是大的、易碎的、容易撕裂的菌体，其在上部和中部区域厚30-55 μ m，并且通常具有显微镜下的边缘齿;（ii）在上部边缘区域产生zoids;（iii）雌雄异株配子体和孢子体的有规律的交替，（iv）从脱落的附着体产生自由漂浮的叶状体，这些叶状体通过破碎再生植物性，在夏季至秋季形成绿色潮，（v）细胞排列紊乱，上部和中部为多边形或四边形;（vi）叶绿体覆盖细胞外表面，有1-3个蛋白核。大野石莼（Ulva ohnoi）与U. armoricana Dion等人，联合fasciata Delile、条斑叶蝉U. reticulata Forsskal、乌桕U. scandinavica Bliding和U. spinulosa Okamura et Segawa，它们都具有显微边缘锯齿，呈叶状体状、细胞状或生活史模式。它还通过核编码的内部转录间隔区和5.8S核糖体RNA基因的序列以及质体编码的核酮糖-1，5-二磷酸羧化酶/加氧酶基因的大亚基与形态相似的物种区分开来。此外，杂交试验还表明，美国黑猩猩与中国黑猩猩之间存在生殖界限。ohnoi和近缘种U. fasciata和U.网状的。
Ulva ohnoi Hiraoka et Shimada sp. nov. (Ulvales Ulvophyceae) is described from southern and western Japan and is characterized by the following combination of features: W the large, fragile, easily torn thalli, which are 30-55 mum thick in the upper and middle regions and often have microscopic marginal teeth; (ii) the production of zoids in the upper marginal region; (iii) a regular alternation of dioecious gametophytes and a sporophyte; (iv) the production of free-floating thalli from torn-off attached thalli, which reproduce vegetatively by fragmentation and form green tides in summer to autumn; (v) disorderly arranged cells that are polygonal or quadrangular in the upper and middle regions; and (vi) the chloroplast covering the outer face of cell, with 1-3 pyrenoids. Ulva ohnoi differs from U. armoricana Dion et al., U. fasciata Delile, U. reticulata Forsskal, U. scandinavica Bliding and U. spinulosa Okamura et Segawa, which all possess microscopic marginal serrations, in thallus shape, cell shape or life history pattern. It is also distinguished from morphologically similar species by sequences of the nuclear encoded internal transcribed spacers and the 5.8S ribosomal RNA gene and the plastid encoded large subunit of ribulose-1,5-bisphosphate carboxylase/oxgenase gene. Furthermore, crossing tests demonstrate that there is a reproductive boundary between U. ohnoi and the most closely related species, U. fasciata and U. reticulata.