Abstract
In order to determine the extent to which reduced light intensity affects some morpho-anatomical
characteristics and physiological parameters in young plants of Pisumsativum L. we compared certain
plant parameters grown at full illumination (3200 lux) with plants grown at lower intensity
illumination (1700, 1000 and 650 lux) in this research.The ultimate goal is a better understanding of
the adaptations of the studied species (variety) to different light treatments. Low light intensity had a
negative effect on the anatomical structure of the pea leaves and led to the development of thinner
leaves compared to the plants grown at full illumination.The results obtained indicate that the
thickness of the epidermis of the face and the back, the leaf thickness, the thickness of palisade tissue
and the diameter of the conducting bundles decreased with decreasing illumination, while the
thickness of the sponge tissue increased with decreasing illumination. The number of stomata both on
the face and on the back of the leaves was lower at lower illumination, with the stomata cells being
larger in size. The intensity of transpiration decreased with decreasing illumination, which was
correlated with the decrease in the number of stomatal cells. The results show that lower light
treatment had an inhibitory effect on the photosynthetic pigment content, which indicates the
sensitivity of the studied species and raises the question of the level of adaptation and possible
diminished yield of the species studied, if grown under poor light conditions.
