heterocyst


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heterocyst

(hĕt′ər-ə-sĭst′)
n.
A large, thick-walled, nitrogen-fixing cell that occurs at intervals along the filaments of certain cyanobacteria.

heterocyst

a specialized CELL responsible for NITROGEN FIXATION in certain CYANOBACTERIA.
References in periodicals archive ?
Within an hour, these cells could be seen attached to heterocysts in the same manner as in the two-membered culture (Fig.
Specific adhesion of bacteria to heterocysts of Anabaena spp and its ecological significance.
N-fixation, which is performed in specialized cells called heterocysts.
There is some debate whether the presence of heterocysts means
Further, our P addition treatment had much lower inorganic N (owing to the 10-fold dilution of Oyster Pond water), which also may have provided conditions more favorable for heterocyst development and N fixation, resulting in enough increase in N availability to increase phytoplankton biomass.
Also, heterocyst abundance in Oyster Pond is low compared to lakes with high rates of N-fixation (6).
The nitrogen-fixing ability of each leaf of Azolla, because it is a function of the heterocyst frequency of the symbiont it houses (Watanabe, 1982), varies with leaf maturity.
Singh and Singh (1989) found that the application of nitrogen reduced heterocyst frequency in Anabaena Azollae.
MBFG VII) to filaments with heterocyst, Anabaena circinalis and Aphanizomenon flos-aquae (MBFG III), with subsequent prevalence of filamentous species without heterocyst, Planktothrix agardhii and Geitlerinema splendidum, when there is an increase in ammoniacal nitrogen concentrations.
These systems consist of a particular association of species with the measurement of morphological traits, such as, volume, maximum linear dimension, surface area and the presence of mucilage, flagella, aerotopes, heterocysts or siliceous structures.
Heterocyst pattern formation controlled by a diffusable peptide.