Azolla: A review of its biology and utilization

@article{Wagner2008AzollaAR,
  title={Azolla: A review of its biology and utilization},
  author={Gregory M. Wagner},
  journal={The Botanical Review},
  year={2008},
  volume={63},
  pages={1-26}
}
TheAzolla-Anabaena symbiosis is outstanding due to its high productivity combined with its ability to fix nitrogen at high rates. Because of this, in recent decades, countless studies have been conducted on this association, but with insufficient synthesis and coordination. This paper, therefore, attempts to review and synthesize past and recent findings concerning the biology and utilization ofAzolla in hopes that this will facilitate increased future collaborative research on this “green gold… 
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References

SHOWING 1-10 OF 116 REFERENCES
Azolla: Botany, physiology, and use as a green manure
This is a comprehensive review of literature pertaining to the aquatic fern Azolla and its nitrogen-fixing algal symbiont, Anabaena azollae. The preceding decade has witnessed an explosive growth in
TheAzolla-Anabaena association: Historical perspective, symbiosis and energy metabolism
TLDR
The two partners in the association exhibit a comparable developmental gradient and a mechanism of cooperative integration for their energy metabolism, thus improving the efficiency of solar energy conversion and presenting a unique model for biotechnology.
The Azolla, Anabaena azollae Relationship: I. Initial Characterization of the Association.
TLDR
A comparison of the chlorophyll a and b content of Azolla fronds with and without the symbiotic alga resulted in an estimate that in the symbiotics association, the Anabaena azollae accounts for from 7.5 to 15% of the total chlorophyLL.
Effects of atmospheric SO2 on Azolla and Anabaena symbiosis.
TLDR
The results suggest that the Azolla-Anabaena symbiotic system is a very responsive and reliable lower plant model to study the detailed effects of total sulphur deposition upon the balances between various important plant metabolic processes.
The utilization of the Azolla - Anabaena complex as a nitrogen fertilizer for rice
Because it contains nitrogen fixing blue-green algae Anabaefa azota in its fronds, AzoZla grows on a nitrogen-free solution, doubles its mass in 3 or 5 days, and accumulates 30 or 40 kg of N/ha in 2
Physiological Studies with Azolla under Aseptic Conditions. I. Isolation and Preliminary Growth Studies
The techniques of growing plant cells, tissues, and organs, as well as entire plants, under aseptic conditions have been a valuable aid in the fields of plant physiology and morphogenesis. Except for
Nitrogen fixation in Azolla-Anabaena symbiosis as affected by mineral nutrient status
Abstract The growth and nitrogen-fixing capacity of Azolla imbricata were studied with special reference to the effects of the mineral nutrient status in the medium. The threshold levels of P, K, Mg,
Availability to Rice Plants of Nitrogen Fixed by Azolla
The decomposition processes of Azolla in water and soil in relation to the availability of Azolla-nitrogen to rice plants were determined using 15N as a tracer. Among the 3 species of Azolla (8
Effects of Atmospheric NO2 on Azolla-Anabaena Symbiosis.
Cultures of the water fern Azolla pinnata R, Br. exposed for 1 week to atmospheric NO2 (50, 100 or 200 nl l-1) induced additional levels of nitrate reductase (NaR) protein and nitrite reductase (NiR)
Improving nitrogen-fixing systems and integrating them into sustainable rice farming
TLDR
The general principle of integrated uses of BNF in rice-farming systems is shown and the inoculation of cyanobacteria has been long recommended, but its effect is erratic and unpredictable.
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