Ulva fenestrata

Rautenberger, Ralf, 2024, Germanium dioxide as agent to control the biofouling diatom Fragilariopsis oceanica for the cultivation of Ulva fenestrata (Chlorophyta), Botanica Marina (Warsaw, Poland) 67 (2), pp. 93-100 : 95-96

publication ID

https://doi.org/ 10.1515/bot-2023-0075

DOI

https://doi.org/10.5281/zenodo.11582444

persistent identifier

https://treatment.plazi.org/id/03C39459-FFD2-FFBE-F420-FBB0FB0DFB31

treatment provided by

Felipe

scientific name

Ulva fenestrata
status

 

3.2 Small- and large-scale experiments with Ulva fenestrata treated with GeO 2

In the small-scale experiment, the RGR and all three photosynthetic parameters of Ulva fenestrata were statistically similar between the control (0 mg GeO 2 l −1) and the 3 GeO 2)

standard deviations. Lowercase letters above columns indicate

statistically significant differences between the treatments (P <0.001,

1-way ANOVA, Tukey-Kramer HSD post-hoc test).

20 photons 0.25 0.30

)

15

1

1

%

d

ETR

μmol0.20

(10

0.15

RGR 5 α electrons 0.05 0.10

0 μmol 0.00

0 0.022 0.223 2.235 (0 0.022 0.223 2.235 Figure 3: Physiological parameters of the small-scale cultivation of Ulva fenestrata with GeO 2.

40)

) 1

( A) Relative growth rates ( RGR),

1

− − s200

s

2 ( B) photosynthetic electron transport

2 −

m

30

m

efficiencies (α ETR), ( C) maximum electron

ETR

electrons max

20 photons 150

100 transport

fenestrata

saturation rates

after

points (

small-scale

ETR of max photosynthesis) and

cultivation

(D) light ( E k

(

)

5

of

days

Ulva

) 10

μmol μmol

(

E

(

k 50 in tions 1-l glass at 140 beakers µmol photons with four m −2 GeO s −1 2 and concentra- 9 ° C.

0 0

Data are means of three replicates per treat-

0 0.022 0.223 2.235 0 0.022 0.223 2.235

ment (n = 3) and error bars represent standard

GeO 2 concentration (mg L− 1) GeO 2 concentration (mg L− 1) deviations.

concentrations tested between 0.022 and 2.235 mg l −1 (Figure 3). In addition, the contents of Chl a and Chl b in U. fenestrata remained unaffected by the presence of different GeO 2 concentrations in the seawater ( Table 1 View Table 1 ). However, there was slight decrease in the Chl a / b ratio of U. fenestrata from 1.61 ± 0.08 in the control by 10 – 15 % in the presence of GeO 2 ( P = 0.0208, 1-way ANOVA; Table 1 View Table 1 ).

In the large-scale experiment, the RGR, all three photosynthetic parameters, and the chlorophyll contents, including the Chl a / b ratio of U. fenestrata , were statistically similar between the control and the two tested GeO 2 concentrations after 14 days of cultivation (Figure 4 and Table 1 View Table 1 ). However, the addition of GeO 2 to the seawater decreased the density of F. oceanica on the wall surfaces of the Plexiglass water tanks by 36 – 43 % at 0.223 – 2.235 mg GeO 2 l −1 compared to the control ( P = 0.0077, 1-way ANOVA; Figure 5 View Figure 5 ).

A

Harvard University - Arnold Arboretum

B

Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet

C

University of Copenhagen

E

Royal Botanic Garden Edinburgh

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

Kingdom

Plantae

Phylum

Chlorophyta

Class

Ulvophyceae

Order

Ulvales

Family

Ulvaceae

Genus

Ulva

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