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    REACTION OF EUROPEAN BEECH SEEDLING LEAVES TO HEAT SHOCK
    (CEP USM, 2023) Zdioruk, Nina; Sfeclă, V.; Platovschii, Nicolai; Ralea, T.
    Heat shock is considered an abiotic stress for plant growth. The effect of heat shock of various intensity on the leaves of the seedlings of the European beech (Fagus sylvatica L.) was studied. The seedlings were obtained from the seeds which were collected from different regions of the Republic of Moldova, Romania and Ukraine. The magnitude of the damage dealt to the photosynthetic apparatus was determined by the method of PAM - fluorimetry. The experiment was carried out during the period when 4–5 true leaves appeared in beech seedlings at a heat shock temperature of +50 and +52°C.
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    ACTIVITATEA CATALAZEI, PEROXIDAZEI ȘI PEROXIDĂRII LIPIDELOR ÎN RĂDĂCINILE PORUMBULUI SUB INFLUENȚA ȘOCULUI TERMIC ȘI A PREPARATLUI REGLALG
    (CEP USM, 2023) Cauș, Maria; Dascaliuc, A.; Borozan, P.
    In recent years, due to the climate changes, the growth and development of corn is affected by heat stress, especially at an early stage of ontogeny. Influence of biostimulant Reglalg, used for seed pretreatment of maize hybrids Por. 310 and Por. 374 before exposure to heat shock (HS) at 50°C for 30 min, on catalase (CAT), peroxidase (PO), and lipid peroxidation (LPO) of root seedlings was studied. Compared to the Reglalg variants, root growth of control seedlings was more strongly affected by HS, since the activity levels of CAT, PO and MDA content in the roots were higher. This demonstrates the beneficial effects of Reglalg in increasing maize tolerance to HS.