Uptake of the cyanobacterial neurotoxin, anatoxin-a, and alterations in oxidative stress in the submerged aquatic plant Ceratophyllum demersum

Plectosporium tabacinum, the anamorph of Plectosphaerella cucumerina, was isolated in 1996 from Hydrilla verticillata (hydrilla), an invasive aquatic weed in Florida. P. tabacinum, applied as a suspension of conidia, was pathogenic to hydrilla shoots maintained in aqueous solutions in test tubes. Koch's postulates were fulfilled in several repeated experiments. Infected shoots became slightly chlorotic within 24 h after inoculation. Infected leaves remained intact and were supported by water pressure but collapsed upon removal from water. Histological studies of leaves stained with malachite green and acid fuchsin revealed fungal hyphae within plant cells. The disease developed over a range of temperatures from 15 to 30°C. At 25°C, symptoms were most severe in 5% Hoagland's solution, followed by river water, deionized water, 0.5% Hoagland's, tap water, and spring water. Disease severity increased as inoculum concentration was increased from 105 to 107 conidia ml-1. This is the first report of P. tabacinum as a pathogen of hydrilla, a fully submerged aquatic plant species.

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Vesicular arbuscular mycorrhiza studies with a submerged aquatic plant

Transactions of the British Mycological Society ◽

10.1016/s0007-1536(85)80264-3 ◽

1985 ◽

Vol 85 (4) ◽

pp. 683-688 ◽

Cited By ~ 18

Author(s):

C.C. Tanner ◽

J.S. Clayton

Keyword(s):

Arbuscular Mycorrhiza ◽

Aquatic Plant ◽

Vesicular Arbuscular Mycorrhiza ◽

Submerged Aquatic Plant ◽

Vesicular Arbuscular

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Submerged aquatic plant (Vallisneria spiralis and Egeria densa) utilisation as a biogas cleaner and feedstock of co-digestion

International Journal of Engineering and Management Sciences ◽

10.21791/ijems.2019.4.19. ◽

2019 ◽

Vol 4 (4) ◽

pp. 172-180

Author(s):

Gábor Nagy

Keyword(s):

Plant Growth ◽

Aquatic Plant ◽

Significant Part ◽

Control Group ◽

Egeria Densa ◽

Vallisneria Spiralis ◽

Gas Cleaning ◽

Submerged Aquatic Plant ◽

Sheep Manure ◽

Water Scrubber

Biogas was produced from sheep manure and two types of submerged aquatic plant (Vallisneria spiralis and Egeria densa). The gas cleaning was carried out by a water scrubber, where a significant part of CO2 and H2S can be separated from the gas. A part of water from the scrubber was circulated through an aquatic plant growth tank and the growth of used plants was examined. Addition of E. densa to sheep manure increased gas yield by 8% and the mixing of sheep manure and V. spiralis resulted in 21% increase in gas yield. With the used scrubber, 70-80 vol% methane content can be reached in the cleaned biogas, and the water from the scrubber (which contained dissolved CO2 and H2S) resulted in 56-87% increase in size as opposed to 12-44% increase in the control group.

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