Figure 1.
Scanning electron microphotographs (magnification: 30×).
Structure of A. formosa radial corallites and S. pistillata corallites, developed under different light spectra: T5 fluorescent lamps (T5), light emitting diode (LED) and light emitting plasma (LEP). Photosynthetically active radiation (PAR) was identical to all tested light spectra: 250±20 µmol quanta m−2 s−1. Distance among corallites (DAC), corallite diameter (CD), theca thickness (TT), and septal length (SL).
Figure 2.
Schematic representation of corallites.
Distance among corallites (DAC), corallite diameter (CD), theca thickness (TT), and septal length (SL).
Figure 3.
Scanning electron microphotographs (magnification: 5000×).
Structure of A. formosa and S. pistillata corallites septa, developed under different light spectra: T5 fluorescent lamps (T5), light emitting diode (LED) and light emitting plasma (LEP). Photosynthetically active radiation (PAR) was identical to all tested light spectra: 250±20 µmol quanta m−2 s−1. White arrows point septal microstructures, namely crystallites form and size distribution, as well as fibers growth orientation.
Figure 4.
Morphometric parameters of A. formosa and S. pistillata corallites.
Skeletal macrostructures obtained after SEM image analyses of coral fragments stocked under T5 fluorescent lamps (T5), light emitting diode (LED) and light emitting plasma (LEP). The blue horizontal line in each light treatment represents the average value for the distance among corallites (DAC), corallite diameter (CD), theca thickness (TT), and septal length (SL). The shorter black lines represent average measurements within each coral fragment. Different capital letters on the same graphic represent significant differences (p<0.05).
Figure 5.
Principal component ordination based on A. formosa and S. pistillata morphometry.
Distance among corallites (DAC), corallite diameter (CD), theca thickness (TT), and septal length (SL) of coral skeletons from fragments stocked under T5 fluorescent lamps (T5), light emitting diode (LED) and light emitting plasma (LEP). Eigen vectors of multiple correlations (>0.2) are represented.