Response of the floating aquatic fern Azolla filiculoides to elevated CO2, temperature, and phosphorus levels

Hydrobiologia ◽  
2010 ◽  
Vol 656 (1) ◽  
pp. 5-14 ◽  
Author(s):  
Weiguo Cheng ◽  
Hidemitsu Sakai ◽  
Miwa Matsushima ◽  
Kazuyuki Yagi ◽  
Toshihiro Hasegawa
2019 ◽  
Vol 9 (10) ◽  
pp. 2143 ◽  
Author(s):  
Artur Banach ◽  
Agnieszka Kuźniar ◽  
Radosław Mencfel ◽  
Agnieszka Wolińska

The aim of the study was to determine the still not completely described microbiome associated with the aquatic fern Azolla filiculoides. During the experiment, 58 microbial isolates (43 epiphytes and 15 endophytes) with different morphologies were obtained. We successfully identified 85% of microorganisms and assigned them to 9 bacterial genera: Achromobacter, Bacillus, Microbacterium, Delftia, Agrobacterium, and Alcaligenes (epiphytes) as well as Bacillus, Staphylococcus, Micrococcus, and Acinetobacter (endophytes). We also studied an A. filiculoides cyanobiont originally classified as Anabaena azollae; however, the analysis of its morphological traits suggests that this should be renamed as Trichormus azollae. Finally, the potential of the representatives of the identified microbial genera to synthesize plant growth-promoting substances such as indole-3-acetic acid (IAA), cellulase and protease enzymes, siderophores and phosphorus (P) and their potential of utilization thereof were checked. Delftia sp. AzoEpi7 was the only one from all the identified genera exhibiting the ability to synthesize all the studied growth promoters; thus, it was recommended as the most beneficial bacteria in the studied microbiome. The other three potentially advantageous isolates (Micrococcus sp. AzoEndo14, Agrobacterium sp. AzoEpi25 and Bacillus sp. AzoEndo3) displayed 5 parameters: IAA (excluding Bacillus sp. AzoEndo3), cellulase, protease, siderophores (excluding Micrococcus sp. AzoEndo14), as well as mineralization and solubilization of P (excluding Agrobacterium sp. AzoEpi25).


2021 ◽  
Vol 23 (1) ◽  
Author(s):  
A. López-Herrera ◽  
M. Avalos-Borja ◽  
J. R. García-Nava ◽  
L. I. Trejo-Téllez ◽  
A. Alarcón ◽  
...  

2017 ◽  
Vol 64 (1) ◽  
pp. 31
Author(s):  
Arnauld S. M. Djissou ◽  
Akito Ochiai ◽  
Shunsuke Koshio ◽  
Emile D. Fiogbe

In order to eliminate use of fishmeal in aquafeeds, we evaluated the effect of total replacement of fish meal by a mixture of earthworm (Eisenia foetida) and aquatic fern Azolla filiculoides in the diets of Nile tilapia Oreochromis niloticus (Linnaeus, 1758). The experiment was conducted in O. niloticus fingerlings (initial mean weight = 5.6±0.2 g) for a period of 60 days. Five experimental diets isoproteic (30.4±0.6% protein) comprising control diet A0 and four test diets (A1 to A4) without fish meal were formulated. To satisfy essential amino acids requirements in test diets, the ratios 2:1; 1:1; 1:2; 1:5 between A. filiculoides and earthworm meals were used respectively in total replacement of fish meal. The diets were tested in triplicate. On termination of the experiment, the final mean weights in the test diets (10.79 to 11.94 g) were lower than 14.9 g obtained in group fed control diet (p<0.05). The best growth performance and feed utilisation were obtained in fish fed test diets A1 and A4 (SGR = 1.25 and 1.26% day-1; FCR = 2.37 and 2.31 respectively). Excess of lysine in test diets was found to affect the feed utilisation.


2016 ◽  
Vol 61 (5) ◽  
pp. 596-606 ◽  
Author(s):  
Monique M. L. van Kempen ◽  
Alfons J. P. Smolders ◽  
Gerard M. Bögemann ◽  
Leon P. M. Lamers ◽  
Jan G. M. Roelofs

Planta ◽  
2005 ◽  
Vol 223 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Tamar Schor-Fumbarov ◽  
Peter B. Goldsbrough ◽  
Zach Adam ◽  
Elisha Tel-Or

2004 ◽  
Vol 42 (2) ◽  
pp. 97-102 ◽  
Author(s):  
Rony Oren Benaroya ◽  
Eli Zamski ◽  
Elisha Tel-Or

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