Assessment of Parectopa robiniella Clemens (Lepidoptera: Gracillariidae) Effect on Biochemical Parameters of Robinia pseudoacacia Under Conditions of an Industrial City in Steppe Ukraine

Abstract

Antioxidant enzymatic activity and soluble protein content in Robinia pseudoacacia L. (black locust), invasive tree in Europe, plants were determined under feeding conditions of the caterpillars of Parectopa robiniella Clemens, 1863, invasive miner in Europe, in trees of three (I, II, III) age groups (5–10, 15–25, and 40 years). Biochemical analysis data showed significant differences between reference and experimental leaf samples in different urban ecosystems. There was no association between changes in catalase and peroxidase activity and protein content under the influence of leaf blotch miners depending on the tree age. Significant variability of proteins under P. robiniella influence was noted; the highest of its values were recorded in the leaves of ІІІ-aged trees. In most plantings (and especially in trees of age group III), an increase (1.2 to 2.7 times) in GPx activity or the absence of its changes was registered both in the ecologically favorable zone and in the locations affected by emissions from road transport and industrial enterprises. Plants of age groups I and II in the emission areas of metallurgical, pipe-rolling, and chemical industries experienced a significant decrease in GPx activity (by 20.2–44.6%) in the leaves damaged by the phytophage. In most of the plantings studied, catalase showed an increase/stability of its activity in all age groups of trees under condition of pest attack. The highest increase in САТ activity (2.1 times) was recorded in young R. pseudoacacia plants in an ecologically favorable area of the city.

The influence of powdery mildew (Sawadaea bicornis (Wallr.) Miyabe) on chlorophyll fluorescence in Norway maple (Acer platanoides L.) seedlings

“…Якісна оцінка реакції дерев на екстремальні кліматичні умови та пов'язані з цим зміни в місцях зростання дерев є важливою частиною догляду за міськими зеленими насадженнями (Kvitko et al, 2022;Kunah et al, 2022). Міське середовище являє собою широкий спектр стресових факторів із серйозним негативним впливом на міську рослинність (Cui et al, 2021;Lovynska et al, 2022;Shupranova et al, 2022). Антропогенне забруднення, тривалі літні посушливі періоди з високою температурою повітря та наявністю парникових газів викликають ефект міського теплового острова, що суттєво впливає на фізіолого-біохімічні особливості та імунітет міських рослин (Wang et al, 2019).…”

Predicting organic carbon in European soils: Only in Southern Ukraine can we expect an increase in humus content

“…A high moisture content can stimulate carbon sequestration by stimulating ecosystem productivity or release through soil respiration, but excessive soil moisture can inhibit them in relatively humid climates (Davidson & Janssens, 2006). Humidity levels can have varying effects on the carbon cycle and ecosystem productivity in forests (Shupranova et al, 2022). In cool forests, high humidity may cause delays in the carbon cycle, while in warm forests, increased humidity can accelerate the decomposition of soil organic matter .…”

Characteristics of powdery mildew [Sawadaea bicornis (Wallr.) Miyabe] influence on the photosynthetic process in Norway maple (Acer platanoides L.) seedlings

“…Qualitative assessment of the response of trees to extreme climatic conditions and associated changes in the tree habitats is an important part of the care of urban green spaces (Kunakh et al 2022;Kvitko et al 2022). The urban environment represents a wide range of stressors that have a serious negative effect on urban vegetation (Lovynska et al 2022;Shupranova et al 2022). Man-made contamination, long summer dry periods with high air temperatures and the presence of greenhouse gases effect significantly affect the physiological and biochemical characteristics and immunity of urban plants (Wang et al 2019).…”