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甘肃白龙江中上游流域的黏菌 总被引:1,自引:1,他引:0
本文报道了采自甘肃白龙江中上游流域的黏菌52种,其中紫高杯菌Craterium paraguayenese、山地双皮菌Diderma montanum和双被绒泡菌Physarum bitectum为中国新记录种,另有34种为甘肃新记录种。 相似文献
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Two novel deoxysugar esters, named enteridinines A and B, were isolated from the slime mold Enteridium lycoperdon. Their structures, including the absolute configurations of the hydroxyl and methyl groups, were determined by means of extensive spectroscopic data such as UV, IR, MS, 1D and 2D NMR spectra. Enteridinines A and B have unique structures containing 1,7-dioxaspiro[5.5]undecanes with an O-beta-D-mycarosyl-(1-->4)-beta-D-olivosyl and an O-beta-L-olivomycosyl-(1-->4)-beta-D-amicetosyl-(1-->4)-beta-L-digitoxosyl unit, respectively, and showed growth inhibitory activities against Gram positive bacteria. 相似文献
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A. G. Lomagin 《Planta》1978,142(2):123-134
Repair of thermal injury of Physarum polycephalum Schw. plasmodia has been studied by light and electron microscopy. As a result of heating the plasmodia for 10 min at 42°C both the unordered and shuttle protoplasmic streaming were arrested; the outer plasmodial membrane showed alterations at sites of contact with water; the onset of the next mitosis was considerably delayed. The plasmodial ultrastructure was markedly disturbed, including disappearance of the granular component of the nucleoili and a compact, almost fibrillar structure of the latter. The mitochondria became distorted and their intracristal spaces enlarged while the outer and inner membranes appeared in some places to be separated. Glycogen particles disappeared from the cytoplasm. Recovery of both types of protoplasmic streaming of the motility of the plasmodium, of the resistance of its membrane to contact with water, and of the ability of the organism to go through the cell cycle went all hand in hand with the normalization of the structure of nucleoli, mitochondria and cytoplasm. All of the functional and structural characteristics are normalized within ca. 9 h following heating. 相似文献
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Summary Although the plasmodial stage of the MyxomycetePhysarum polycephalum was unaffected with 200 M taxol, the amoebal stage was sensitive to 10 M taxol. The first effect of taxol resulted in an accumulation of cells blocked as a monopolar centrosphere surrounded by condensed chromosomes. In 79% of cases these monoasters contained two pairs of centrioles. The mitotic block in a monopolar stage in the presence of taxol delayed the occurrence of late mitotic events such as chromosome decondensation and formation of the nuclear envelope. Escape from the monopolar centrosphere stage and formation of multinucleated amoebae involved a transient monopolar reconstruction stage in which a long microtubular bundle interacted with a small chromosomal mass outside the monoaster. 相似文献
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本文研究了中国盖碗菌属10种粘菌,其中1个为国内新记录种:四方盖碗菌Perichaenaquadrata;2个为新种:片丝盖碗菌perichaenafrustrifiarissp.nov;灰盖碗菌Perichaenagriseasp.nov,增补了一些种的超微结构特征;增添了新分布区;讨论了种与种之间的关系。新种有拉丁文描述及扫描电镜照片,模式标本保存于吉林农业大学真菌标本室(HJAU),长春。 相似文献
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关于新疆的粘菌,过去仅知8种,且无一为绒泡菌。本文第一作者于1994年在新疆进行了粘菌资源调查,在随后的研究中共明确了50多个种,有10种为绒泡菌,其中的几个种,如垂头绒泡菌Physarumnutans(Bull.)Pers.是常见和广布的,但也有几种是特殊的和稀有的。本文报告了5种绒泡菌:橙红绒泡菌P.aurantiacum S.L.Chen,Y.LietH.Z.Li和侧扁绒泡菌P.loratumS.L.ChenY.Li etH.Z.Li是新种,黄白绒泡菌P.albescensEllisexT.Macbr.和团聚绒泡菌P.conglomeratum(Fr.)Rostaf.是中国新记录种,已知种黄绿绒泡菌P.virescensDitmar显然少见,国内此前仅知分布于福建。橙红绒泡菌P.aurantiacumS.L.Chen,Y.LietH.Z.Li的孢丝近似钙丝菌状,由或大或小的石灰结将许多细短的孢丝线联成致密的白色网体,这使其被归入绒泡菌属,并与同属其它种相区分;侧扁绒泡菌P.loratumS.L.Chen,Y.LietH.Z.Li的联囊体虽发达而侧扁,但顶部无预成开裂线,在相似种中也易识别。本文对这两个新种 相似文献
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