Analysis of chlorophyll “a”, “b”, and carotenoids in leaves of oriental maple, biota, common oak, and chestnut trees resistant to harmful substances emitted by motor vehicles in Tashkent city

Fig. 2.
Process of conducting experiments on samples taken from landscape tree leaves in laboratory 
conditions 
3 Results and Discussion 
Results of the analysis of leaf pigments of the oriental sycamore tree (Table 2). 
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, 02032 (2023)
CONMECHYDRO - 2023
https://doi.org/10.1051/e3sconf/202340102032
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Results of pigment analysis of leaves of oriental biota (Table 3). 
Results of pigment analysis of common oak leaves (Table 4). 
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, 02032 (2023)
CONMECHYDRO - 2023
https://doi.org/10.1051/e3sconf/202340102032
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Results of pigment analysis of chestnut tree leaves (Table 5). 
Compared to the general results, it was found that the amount of pigments of all trees are 
different, and the varieties of ornamental trees depend on the environment of the growing 
regions. Tree leaves in areas with less vehicular traffic also have higher amounts of 
pigments. For example, the number of pigments in the leaves of ornamental trees growing 
along Nyi Sergeli Street in the Sergeli district is lower because the level of traffic in this 
area is high. These indicators indicate that harmful substances emitted by motor vehicles 
hurt the leaves of ornamental trees. On the contrary, the number of pigments in the leaves 
of ornamental trees growing in the Botanical Garden of Yunusabad district is slightly 
higher. This is because the trees grow in natural conditions, the impact of substances 
emitted by motor vehicles is almost absent, and the abundance of other types of ornamental 
trees shows its positive effect. 
 
 
E3S Web of Conferences 
401
, 02032 (2023)
CONMECHYDRO - 2023
https://doi.org/10.1051/e3sconf/202340102032
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