The influence of heat shock and desiccation on boxwood (Buxus sempervirens L.) leaves' photosystem ii and antioxidant systems activity
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DASCALIUC, Alexandru, RALEA, Tudor, ZDIORUK, Nina, CUZA, Petru. The influence of heat shock and desiccation on boxwood (Buxus sempervirens L.) leaves' photosystem ii and antioxidant systems activity. In: Contributii Botanice, 2022, nr. 57, pp. 109-120. ISSN 0069-9616. DOI: https://doi.org/10.24193/Contrib.Bot.57.8
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Contributii Botanice
Numărul 57 / 2022 / ISSN 0069-9616 /ISSNe 2067-3094

The influence of heat shock and desiccation on boxwood (Buxus sempervirens L.) leaves' photosystem ii and antioxidant systems activity

Influența șocului termic și a deshidratării asupra fotosistemului ii și a activității sistemelor antioxidante ale frunzelor de cimişir (Buxus sempervirens L.)

DOI: https://doi.org/10.24193/Contrib.Bot.57.8

Pag. 109-120

Dascaliuc Alexandru1, Ralea Tudor1, Zdioruk Nina1, Cuza Petru2
 
1 Institute of Genetics, Physiology and Plant Protection,
2 Moldova State University
 
Disponibil în IBN: 6 ianuarie 2023


Rezumat

 This research aimed to investigate the response of one-and two-year-old box (Buxus sempervirens L.) leaves to the action of heat shock (HS) and desiccation. These factors influenced the photosystem II activity of the leaves and the degradation of hydrogen peroxide by leaf extracts. The development of these processes was specific depending on the age of the leaves and season of their collection for analysis. Thus, the studied characteristics could assure the elaboration of new, rapid methods of assessing the resistance of leaves to high temperatures, depending on the period (season) of vegetation and their age. At different seasons of the year, the resistance of box leaves to HS tends to correspond to seasonal temperatures, reaching the highest level in summer, intermediate level in spring and autumn, and the lowest in winter. Regardless of the season, the one-year-old leaves are more resistant and have a higher capacity to recover from HS damage than the two-year-old leaves. 

Cuvinte-cheie
Buxus sempervirens, heat shock, leaves, photosystem II, resistance, seasonal and age variations