| Autor: |
NAZARENKO, Mykola, IZHBOLDIN, Oleksandr, SEMENCHENKO, Olena |
| Předmět: |
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| Zdroj: |
Scientific Papers. Series A. Agronomy; 2021, Vol. 64 Issue 1, p486-491, 6p |
| Abstrakt: |
Drought tolerance is one of the key agricultural value traits for arid regions. Our investigation consists of two stages. During fist we worked with well-known by this drought tolerance winter wheat official realized 16 varieties, at the second one we evaluated new 88 mutant lines at М4 – М6 generations, which are potentially higher yielding as compared with the national Ukrainian standard for arid zone (Northern Steppe). It is well known that photosystem-ІІ (PS-ІІ) is less thermal-resistant than photosystem-І (PS-І). Since PS-ІІ is more energy consuming and directly requires water for it active operation, this leads to a conclusion that during drought its activity predominance in the photosynthesizing system is undesirable. We evaluated potential drought tolerance by comparison photosystems activity. The simazine (Sim) 10-4(М) was used as PS-ІІ inhibitor, represses the oxygen release processes in the photosystem. More drought-resistant winter wheat lines showed the predominance of PS-І over PS-ІІ. It was established that the best lines in terms of drought resistance were the wheat lines 133, 157, 157-1, 185, 213, that is the lines with the lowest ratio between PS-ІІ and PS-І were identified as being more drought-resistant. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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