Modern Phytomorphology 5: 73–78, 2014
© e Author(s), 2014
Introduction
Plants constantly have to adaptable to
changing conditions of the environment,
including to conditions of the lighting
(Gumiński 1990; Lamparter et al. 1998;
Kern & Sack 1999; Suetsugu & Wada
2003; Huunen et al. 2005; Cerff &
Posten 2012). ese organisms receive the
light signals through specialized photoreceptors
(Brigss & Christie 2002; Hetmann &
Kowalczyk 2011; Li et al. 2012; Matioc-
Precup & Cachiţă-Cosma 2012), such
as phytochromes, cryptochromes and
fototropines. With their help, the plants have
got the informations about the quantitative and
qualitative changes in the composition of the
spectral lights and about the time of the light
exposure.
Among cryptogamous plants like as mosses,
the signals of light are perceived by specialized
receptors similar to the signals known in plants
vascular. On the molecular level in the genomes
of Funaria Hedw. and Physcomitrella Bruch &
Schimp. were detected CRY genes, alike under
construction to the genes described in Adiantum
cappillus-veneris L. and Arabidopsis thaliana
(L.) Heynh., which regulate the operation of
cryptochrome (Suetsugu & Wada 2003).
Besides, the construction of structure and
expression of genes encoding phytochrome
are beer known in the mosses (P asentsis
et al. 1998; Zeidler et al. 1998).
For many species of mosses living in the
lowest layers of the forest, the direct sun rays
get to them in a small degree. And some moss
species have thin lipid layer that protects them
from the damaging effects of light. Others
IMPACT OF LIGHT SPECTL COMPOSITION ON THE
LENGTH AND WEIGHT OF THE GAMETOPHYTE OF
POLYTRICHASTRUM FORMOSUM (HEDW.) G.L. SMITH,
PLAGIOMNIUM CUSPIDATUM (HEDW.) T.J. KOP. AND
PLEUROZIUM SCHREBERI (BRID.) MI.
Katarzyna Możdżeń
1
*, Diana Saja
1
**, Magdalena Ryś
2
, Andrzej Skoczowski
1
***
Abstract. e aim of the present study was to examine the influence of light spectral composition on the length and weight
of mosses gametophytes: Polytrichastrum formosum (Hedw.) G.L. Smith, Plagiomnium cuspidatum (Hedw.) T.J. Kop. and
Pleurozium schreberi (Brid.) Mi. Plants were grown 31 days in the chambers equipped with LEDs matrices of the same
intensity of light (200 µmol m
-2
· s
-1
), but different spectral composition: white (WL), white-blue (WBL) and red-green-
blue (RGBL). It was found that the WBL as compared to RGBL inhibited the growth of the whole gametophytes of
P. cuspidatum and P. formosum. WBL inhibited also rhizoids length of P. cupsidatum, in comparison to plants growing on
WL and RGBL as well as growth of leaves stalks P. schreberi and P. cuspidatum as compared to WL. For RGBL fresh weight
of plants P. cuspidatum was significantly higher than the WBL, while in P. schreberi higher than that for WBL and WL.
Impact of light quality on the dry maer production was observed only in P. schreberi. Effect of spectral composition of
light on the length and weight of the gametophyte depends on the species of moss.
Key words: Polytrichastrum formosum, Plagiomnium cuspidatum, Pleurozium schreberi, spectral composition of light,
mosses, gametophytes, growth
1
Department of Plant Physiology, Institute of Biology, Pedagogical University, Podchorążych str. 2, Cracow 30-084, Poland;
* kasiamozdzen@interia.pl; ** dianasaja@gmail.com; *** skoczows@up.krakow.pl
2
Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek str. 21, Cracow 30-239, Poland;
mtroc@i-pan.krakow.pl