Results 171 to 180 of about 18,129 (221)

DEGRADATIVE DISEASE IN ULVA RIGIDA (CHLOROPHYCEAE) ASSOCIATED WITH ACROCHAETE GENICULATA (CHLOROPHYCEAE)

Journal of Phycology, 1998
A destructive disease affecting tank‐cultivated Ulva rigida C. Agardh. was characterized by green spots, initially located at the base of the thalli, that spread through the host thallus and gradually caused perforations of the frond. The endophytic filamentous green alga Acrochaete geniculata (Gardner) O’Kelly was identified as the causative agent of ...
del Campo, E, Garcia-Blairsy Reina, Guillermo, Correa, JA   +2 more
openaire   +3 more sources

Sterols of mediterranean chlorophyceae

Experientia, 1980
The distribution of sterols in 8 Mediterranean green algae has been investigated. C29 sterols are the major group in the species examined. 28-Isofucosterol seems to be typical for Ulotrichales, and the rare clerosterol for the genus Codium.
E. Fattorusso, S. Magno, L. Mayol
openaire   +1 more source

Physiological characteristics of Trebouxia (Chlorophyceae, Chlorococcales) and Pseudotrebouxia (Chlorophyceae, Chlorosarcinales)

Phycologia, 1977
Abstract The phycobionts of Trebouxia (Chlorococcales) and of Pseudotrebouxia (Chlorosarcinales) grow well on 1·5–1·0% agarized Bold's Basal Medium. Vitamins are not necessary for maintaining growth. Glucose enhances growth in liquid medium. Utilization of inorganic and organic sources of nitrogen varies between genera and among Isolates of the same ...
openaire   +1 more source

Chlorophyceae

Class Chlorophyceae The class Chlorophyceae, one of the three crown branches of green algae, includes morphologically and ecologically diverse organisms that occur mainly in freshwaters. The thallus morphology ranges from unicellular algae (with or without flagella) or simple colonies to branched or unbranched filaments, or even blade-like thalli ...
Veselá, Veronika, Malavasi, Veronica, Škaloud, Pavel   +2 more
openaire   +1 more source

SOME CHLOROPHYCEAE FROM CUBAN SOILS

American Journal of Botany, 1958
THE OCCURRENCE of numerous spherical zoosporeproducing chlo,rophycean organisms in soil, the distinctive morphological attributes of which are not immediately apparent upon inspection, has resulted in the description of many species imperfectly circumscribed.
Gina Arce, Harold C. Bold
openaire   +1 more source

Polymorphism in gloeotaenium (Chlorococcales, Chlorophyceae)

Hydrobiologia, 1981
Morphological variations of Gloeotaenium loitlesbergarianum Hansgirg were studied both in cultures and in nature. In cultures, the alga exhibits considerable variation in the number of cells per colony, ranging from unicells to colonies with more than four cells. The characteristic band was also absent in cultures.
P. V. Devi Prasad, Y. B. K. Chowdary
openaire   +1 more source

Conditional senescence in Chlamydomonas reinhardtii (Chlorophyceae)

Journal of Phycology, 2013
The mechanisms of microalgal senescence may play an important role in nutrient recycling and enhanced survival. However, the aging physiology of microalgae is an understudied phenomenon. To investigate the patterns of conditional senescence in Chlamydomonas reinhardtii P. A. Dangeard, we used a cell wall‐less strain, transformed with a reporter gene to
Penny L, Humby, Ellen C R, Snyder, Dion G, Durnford   +2 more
openaire   +2 more sources

Pleomorphism inScenedesmus quadricauda (Turp) Bréb. (Chlorophyceae)

Hydrobiological Bulletin, 1976
A clone ofScenedesmus quadricauda, isolated from Tjeukemeer, exhibits a high degree of morphological variation in synchronized cultures. Cells are synchronized by light-dark cycles. During the photoperiod they build up the capacity to divide. First division into 2- and 4-celled coenobia is induced, then during the second half of the photoperiod the ...
openaire   +2 more sources

PYRENOID ULTRASTRUCTURE IN ULOTHRIX (CHLOROPHYCEAE)

Acta Botanica Neerlandica, 1980
SUMMARY The ultrastructure of the pyrenoid in the gametophytic phase of the species of Ulothrix shows a large diversity. This was revealed by a study of the morphology of the pyrenoid matrix, the associated starch cap and the pattern of the intrapyrenoidal chloroplast strands. From these features, eight types of pyrenoid structure were recognized in
G. M. Lokhorst, W. Star
openaire   +1 more source

Die GattungPodohedra (Chlorophyceae, Chlorococcales)

�sterreichische Botanische Zeitschrift, 1965
Die GattungPodohedra umfast mindestens vier Arten,P. distincta wird neu beschrieben, die Diagnosen der anderen Arten werden erganzt. Die taxonomischen Merkmale wurden an Kulturen uberpruft. Der Bau des Pyrenoids bietet ein brauchbares zusatzliches diagnostisches Merkmal.
openaire   +1 more source