sodininkystė ir daržininkystė 25(4)

Amount of UV-screening compounds in the leaves of Malus domestica decreased
as UV-B doses increased. 4 kJ daily UV-B doses resulted in lowest amount of
those pigments, while the greatest amounts of UV pigments were determined in
leaves of reference Malus domestica plants (Fig. 1 D).
Table 1. Relative amounts of UV-absorbing compounds under various stress conditions.
Means indicated by the different letters are significantly different within the
column of each UV treatment (n = 3; P ≥ 0.01)
1 lentelë. Santykiniai UV sugerinèiø pigmentø kiekiai augalø lapuose skirtingomis
streso sàlygomis. Skirtingos raidës rodo esminá skirtumà tarp vidurkiø reikðmiø
stulpeliuose kiekvienam UV poveikiui atskirai (n = 3; P ≥ 0,01)
UV treatment
UV poveikis
Increased t° and CO 2
Padidinta t° ir CO 2 kiekis
Object
Objektas
Raphanus sativus Röhl.
Malus domestica
Control
– 48.6 a 569.3 a
Kontrolë + 104.8 b 723.3 b
2 kJ
– 68.7 a 530.8 a
+ 121.85 b 775.4 b
4 kJ
– 59.2 a 478.7 a
+ 97.7 b 710.8 b
An additional stress including increased temperature (25/16°C) and CO 2
level
(700 ppm) together with UV-B radiation resulted in significantly increased amount
of UV-screening compounds in all inspected plant species in comparison to plants
exposure solely to UV-B radiation or reference plants (Table 1). Though no significant
variation of UV pigments were determined in Raphanus sativus L. and Malus
domestica under different UV-B treatment whenever additional stress (temperature,
CO 2
) was applied (Figs. 2 A, B).
Fig. 2. Amount of UV pigments in (A) Raphanus sativus L. and (B) Malus domestica
leaves under different UV-B exposure, increased temperature and increased CO 2
level.
Means indicated by the different letters are significantly different (n = 3; P ≥ 0.05)
2 pav. Santykiniai UV sugerianèiø pigmentø kiekiai (A) ridikëliø ir (B) obelø lapuose
veikiant skirtingomis UV-B dozëmis, esant aukðtai temperatûrai ir padidintam CO 2
kiekiui. Skirtingos raidës rodo esminá skirtumà tarp vidurkiø (n = 3; P ≥ 0,05)
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