Functioning of the Photosynthetic Apparatus in Response to Drought Stress in Oat × Maize Addition Lines

International Journal of Molecular Sciences

Edyta Skrzypek¹  Kinga Dziurka¹  Katarzyna Juzoń¹  Marzena Warchoł¹  Ilona Czyczyło-Mysza¹  Tomasz Warzecha²  Dominika Idziak-Helmcke³  Magdalena Rojek-Jelonek³ 

[1] Department of Biotechnology, The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Krakow, Poland;Department of Plant Breeding, Physiology, and Seed Science, University of Agriculture in Krakow, Podlużna 3, 30-239 Krakow, Poland;Institute of Biology, Biotechnology, and Environmental Sciences, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland;

关键词: Avena sativa L.;    chlorophyll a fluorescence;    drought;    GISH;    OMA line;    photosynthetic apparatus;   

DOI  :  10.3390/ijms21186958

来源: DOAJ

【 摘 要 】

The oat × maize chromosome addition (OMA) lines, as hybrids between C3 and C4 plants, can potentially help us understand the process of C4 photosynthesis. However, photosynthesis is often affected by adverse environmental conditions, including drought stress. Therefore, to assess the functioning of the photosynthetic apparatus in OMA lines under drought stress, the chlorophyll content and chlorophyll a fluorescence (CF) parameters were investigated. With optimal hydration, most of the tested OMA lines, compared to oat cv. Bingo, showed higher pigment content, and some of them were characterized by increased values of selected CF parameters. Although 14 days of drought caused a decrease of chlorophylls and carotenoids, only slight changes in CF parameters were observed, which can indicate proper photosynthetic efficiency in most of examined OMA lines compared to oat cv. Bingo. The obtained data revealed that expected changes in hybrid functioning depend more on the specific maize chromosome and its interaction with the oat genome rather than the number of retained chromosomes. OMA lines not only constitute a powerful tool for maize genomics but also are a source of valuable variation in plant breeding, and can help us to understand plant susceptibility to drought. Our research confirms more efficient functioning of hybrid photosynthetic apparatus than oat cv. Bingo, therefore contributes to raising new questions in the fields of plant physiology and biochemistry. Due to the fact that the oat genome is not fully sequenced yet, the mechanism of enhanced photosynthetic efficiency in OMA lines requires further research.

【 授权许可】

Unknown