Results 131 to 140 of about 1,091 (175)

Saline lake charophytes and their geological significance

Journal of Sedimentary Research, 1980
Abstract Charophytes are found in some ephemeral saline lakes in Australia. Healthy green charophytes, bearing oogonia, are frequently observed at salinities ca. 1-2 times that of seawater. Field observations of salinity tolerance are confirmed by experiments which demonstrate photosynthetic 14 C-carbon dioxide fixation at these ...
Burne, RV, Bauld, J, Dedeckker, P
openaire   +3 more sources

Charophyte algae and land plant origins

Trends in Ecology & Evolution, 2004
The charophyte algae are six distinct groups of mostly freshwater green algae that are related to modern land plants. Charophyte algae exhibit diverse morphologies and reproductive strategies, from unicells to branching erect forms, and from swimming asexual spores to sex involving eggs and sperm, respectively.
Richard M, McCourt, Charles F, Delwiche, Kenneth G, Karol   +2 more
openaire   +2 more sources

Bulbils of some charophytes

Proceedings / Indian Academy of Sciences, 1987
The structure and development of the bulbils ofChara hornemannii, Chara aspera, Lamprothamnium papulosum, Lamprothamnium succinctum andNitellopsis obtusa have been studied.
openaire   +1 more source

Action Potential in Charophytes

2007
The plant action potential (AP) has been studied for more than half a century. The experimental system was provided mainly by the large charophyte cells, which allowed insertion of early large electrodes, manipulation of cell compartments, and inside and outside media.
openaire   +2 more sources

Quantization of a flux ratio in charophytes?

Biochimica et Biophysica Acta (BBA) - Biomembranes, 1971
Abstract 1. 1. The ratio of the Cl− influx into the vacuole to the Cl− influx into the whole cell has been measured for a large number of internodal cells of Chara corallina. The distribution of the values of this ratio shows no tendency to cluster about preferred values in integer ratios with each other. 2. 2. The claim of MacRobbie 1, that
G P, Findlay, A B, Hope, N A, Walker
openaire   +2 more sources

Calcification of the Charophyte Oosporangium

1991
The oosporangium is a unique and complex structure consisting of a central reproductive cell (the oospore) surrounded by vegetative cells. In the subfamily Chareae, six vegetative ensheathing cells (i.e. five spiral cells and one basal cell), completely surround the oospore and are in intimate contact with it.
openaire   +1 more source

New insights into Paleozoic charophyte morphology and phylogeny

American Journal of Botany, 2005
Examination of Paleozoic charophyte fructifications using microscopy and high‐resolution x‐ray synchrotron microtomography has revealed that most of them have a utricle that forms a supplementary calcified cover around the gyrogonite. All Paleozoic families with utricles have been assigned to the Sycidiales.
Monique, Feist, Junying, Liu, Paul, Tafforeau   +2 more
openaire   +2 more sources

Origin of plant auxin biosynthesis in charophyte algae

Trends in Plant Science, 2014
The TRYPTOPHAN AMINOTRANSFERASE OF ARABIDOPSIS (TAA)/YUCCA flavin monooxygenase (YUC) pathway is the main auxin biosynthesis pathway in plants [1]. The origin of plant auxin biosynthesis remains unclear and controversial. Recently Yue et al. addressed this issue by performing phylogenetic analysis of TAA and YUC proteins [2]. They found that land plant
Chunyang, Wang, Yang, Liu, Si-Shen, Li, Guan-Zhu, Han   +3 more
openaire   +2 more sources

Microalgal and cyanobacterial assemblages on charophytes: a metacommunity perspective

Fundamental and Applied Limnology, 2017
Despite all of the studies that have been carried out on angiosperm macrophytes, it is still unknown beyond any doubt whether charophytes affect periphyton composition. From the viewpoint of aquatic community organization, we must not only answer this question but must also evaluate the importance of this source of periphyton to the seston.
Rojo, Carmen, Mosquera, Zuleyma, Álvarez Cobelas, Miguel, Segura, Matilde   +3 more
openaire   +2 more sources

CONSPECIFICITY OF SOME CHAROPHYTES¹

Journal of Phycology, 1967
SUMMARY Sweets Lake, British Columbia, is the type locality for plants originally described as Chara buckellii. Plants from this locality liave been crossed successfully to a second clone from Laguna La Drava, Argentina, the type locality for Nitellopsis bulbillifern.
V W, Proctor, C C, de Donterberg, A T, Hotchkiss, K, Imahori   +3 more
openaire   +2 more sources