共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
3.
Charles Drechsler 《American journal of botany》1960,47(5):368-377
Drechsler , Charles . (Plant Industry Sta., Beltsville, Md.) Two new species of Conidiobolus found in plant detritus. Amer. Jour. Bot. 47(5) : 368—377. Illus. 1960.–By canopying Petri plates of maize-meal agar with small quantities of friable or mealy plant detritus 2 new species of Conidiobolus, both of moderate dimensions, were isolated. They are described as C. incongruus and C. multivagus. The former, obtained from leaf mold collected in Colorado, produces zygospores which with respect to their internal organization differ markedly from those of congeneric species but resemble rather closely the globuliferous zygospores of Basidiobolus haptosporus and B. meristosporus. Conidiobolus multivagus, obtained from decayed twigs of Casuarina equisetifolia gathered in western Florida, forms a mycelium that soon becomes conspicuously disconnected. The disconnected condition here results partly from the production of many detached slender filaments, which, by constantly withdrawing protoplasmic materials from the posterior end while elongating at the tip, migrate through the slated substratum apparently without any intake of nutrients. The detached conidia of C. incongruus are provided with a more prominent basal papilla than those of C. multivagus, though both species show equally sharp demarcation between the globose main contour of the conidium and the dome-shaped contour of the papillia. 相似文献
4.
5.
6.
7.
星球藻属Asterocapsa二新种 总被引:1,自引:0,他引:1
原植体球形,亚球形或长圆形,细胞单生或2, 4个细胞组成小群体,再由小群体组成大群体,群体直径8~17μm。细胞球形,不包括胶被直径为2~2.2μm,含胶被时直径为4~5.5μm,个体及群体胶被宽厚、坚硬、黄色、层理明显,密生黄色疣突状棘刺。原生质体均匀或具细小颗粒体,蓝绿色。 相似文献
8.
9.
10.
11.
12.
Two new gynandrosporous species of Oedocladium from the United States were isolated into unialgal culture and comparative studies were made. The new taxa described, O. carolinianum sp. nov. and O. cir-ratum sp. nov., are morphologically very similar. Both species have an opercufate oogonium with inferior division, oospore walls with the middle layer ungulate, and hyaline suffultory cells containing a small amount of vacuolated cytoplasm. Conditions for sexuality in culture zuere determined for both species. Zoospores and akinetes serve as means for asexual reproduction. 相似文献
13.
Two new species of Chlamydomonas, C. surtseyiensis and C. archibaldii, are described as is their sexual reproduction which occurs in clonal culture. 相似文献
14.
15.
16.
17.
<正> 斑蝉姜 新种 图1 Zingiber monglaense Senjen et Z.Y.Chen sp.nov Species affinis Z.nudicarpo D.Fang a quo differt spica globosa velellipsoidea tantum dimidio minore longa,foliis illo 3-plo majoribus,nervislateralibus manifestis. Herba perennis 1.6-2 m alta.Folia 10-26;lamina elliptica vel longi-elliptica,30-70 cm longa,6-15 cm lata;petiolus 0-2 cm longus;ligula 相似文献
18.
19.