Irradiation level affects fluctuating asymmetry value of bilateral traits of cucumber in juvenile phase
Laen...
Kuupäev
2018
Kättesaadav alates
Autorid
Rakutko, S.
Rakutko, E.
Avotins, A.
Berzina, K.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Light is an important factor of the plant's environment.
The aim of research was to
confirm the hypothesis on the influence of different irradiation levels on the fluctuating
asymmetry (FA) value of bilateral traits of plants cultivated in the indoor plant lighting.
The
object of research was the plants of cucumber (
Cucumis sativus L
) as one of the main glasshouse
crops. Young 14
-
day
-
old cucumber plants in the first true leaf
phase were studied.
Different
irradiation levels (15.0, 22.5 and 30
W
m
-
2
) were maintained by fluorescent lamps.
An essential
asymmetry of bilateral structures in plants grown under different irradiation levels was observed.
It was found that statistically
significant lower values of FA, that is greater stability of plant
development, correspond to increased plant performance.
When the irradiation level was
switched from 15 to 30 W
m
-
2
(by 100%), the FA index for different bilateral structures varied
by dif
ferent amount: in terms of cotyledons mass it decreased from 0.046 to 0.032 relative units
(by 30.2%), in terms of chlorophyll content in cotyledons it increased from 0.038 to 0.073 relative
units (by 88.6%).
In some bilateral structures the FA index varia
tion was rather small: in terms
of the cotyledon area it was zero, in terms of the cotyledon thickness
–
by 1.8%.
I
t was
experimentally prove through the example of cucumber plants that FA index could be used
as an
indicator of plant developmental stability, characterizing the deviations of the growing
environment parameters from the normal state in the indoor cultivating.
Kirjeldus
Article
Märksõnad
indoor plant lighting, developmental stability, articles