Impact of the varying intensity light on some morpho-anatomical characteristics and physiological parameters in young plants of Pisum sativum L.

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.

Impact of climatic factors on growth and development of Cichorium Endivia in greenhouse in Leningrad region, Russia

“…There are no published information by other researches except our earlier studies on the response of the chicory endive to abiotic factors such as temperature, humidity and duration sunny days. However, a large number of studies on the influence of the hydrothermal coefficient and climatic factors on the growth and development of other plants agree that excessive fluctuations in temperature and precipitation have different effects on different phases of plant growth and development (e.g., Zervoudakis et al, 2012;Romanovskaja et al, 2016;Vahabinia et al 2019;Maksimović et al, 2020). So, Maksimović et al (2020) studying the effect of light on morphological and physiological characteristics of peas reported that intensity of transpiration decreased with decreasing illumination due to decrease in the number of stomatal cells.…”