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Sirvi Autor "Butenko, Sergey" järgi

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  • Pisipilt
    Kirje
    Effect of seed pre-treatment with plant growth compound regulators on seedling growth under drought stress
    (Estonian Academic Agricultural Society, 2021) Jia, Peipei; Melnyk, Andrii; Zhang, Zhiyong; Butenko, Sergey; Kolosok, Volodymyr
    The experiment aimed to evaluate the effect of different compound regulators on the germination rate, seedling morphology of two mustard (Brassica juncea L.) cultivars ('Felicia' and 'Prima') under simulated drought stress with PEG-6000. The eight commercial growth compound regulators (ALBIT, VERMISTIMD, ANTISTRESS, AGRINOS, REGOPLAN, BIOFOGE, STIMULATE, and FAST START) were pretreated seeds at recommended doses. The application of growth regulators promoted the growth of seedlings under drought stress but had no obvious effect on the germination rate of the two varieties. The root fresh weight, total root length, leaf area, stem length, and stem volume in 'Felicia' significantly increased with ANTISTRESS treatment by 24.28, 3.30, 24.70, 19.40, and 30.90%. In addition, the number of lateral roots reached the maximum with AGRINOS and REGOPLAN treatment compared with plants without regulators under drought conditions, which were 135.55 and 121.20%, respectively. For 'Prima', the application of FAST START had a remarkable effect on root fresh weight, total root length, lateral root number and primary root length, root surface area, leaf area, and stem volume by 17.62, 18.12, 211.20, 53.75, 28.57, 15.90, and 32.30%, respectively.
  • Pisipilt
    Kirje
    Trends in the transformation of plant ontogenesis under global climate warming
    (Estonian Academic Agricultural Society, 2022) Kovalenko, Ihor; Butenko, Sergey; Zhezhkun, Anatoly; Porokhniach, Ihor; Abduraimov, Ozodbek; Klymenko, Hanna
    Observations of the process of ontogenesis in a group of woody plants and forest grass in the phytocenoses of the Ukrainian Polesie of Sumy region with their division into boreal and nemoral species were done. Found that in the last two decades, nemoral plant species begin vegetation earlier and pass the first phases of the ontogenetic cycle faster than boreal species. Changes in plant ontogenesis, in turn, lead to changes in the population characteristics of plant species: the number of individuals in the population, the size and configuration of the population field and the ontogenetic and vital spectra of populations changed. There has been a tendency to regular changes in the ontogenetic spectra of both nemoral and boreal plant species, but their nature was different. In nemoral plant species, the proportion of juvenile and immature individuals in the ontogenetic spectra increased and populations acquired the character of invasive, reflecting the process of progressive strengthening of their position in phytocenoses. In populations of boreal species, on the contrary, the ageing process accelerated – the proportion of old generative, senile and subsenile individuals increased.