Skip to the main content

Journal of Central European Agriculture, Vol. 25 No. 3, 2024.

Original scientific paper

https://doi.org/https://doi.org/10.5513/JCEA01/25.3.4302

C3 and C4 photosynthetic performance in cold stress

Maja MATOŠA KOČAR ; Agricultural Institute Osijek, Južno predgrađe 17, Osijek, Croatia
Aleksandra SUDARIĆ ; Agricultural Institute Osijek, Južno predgrađe 17, Osijek, Croatia
Tomislav DUVNJAK ; Agricultural Institute Osijek, Južno predgrađe 17, Osijek, Croatia
Andrija BRKIĆ ; Agricultural Institute Osijek, Južno predgrađe 17, Osijek, Croatia
Lovro VUKADINOVIĆ ; Agricultural Institute Osijek, Južno predgrađe 17, Osijek, Croatia
Maja MAZUR ; Agricultural Institute Osijek, Južno predgrađe 17, Osijek, Croatia

Full text: english pdf 926 Kb

page 819-832

downloads: 0

cite

Abstract

Early sowing to avoid summer stresses poses a significant risk of cold stress for warm-season crops such as soybean and maize in Croatia. To address the aforementioned issues, a study was conducted to investigate the effects of lowtemperature treatment on early growth of soybean (C3) and maize (C4), highlighting the differences in photosynthetic responses and biomass changes. The findings revealed a significant low-temperature effect on the minimum fluorescence (F0), the maximum fluorescence (Fm) and the maximum quantum yield of PSII photochemistry (Fv /Fm), with notable distinctions between C3 and C4 photosynthesis. Low temperatures had the most pronounced effect on the average performance index of overall photochemistry (PItotal). The PItotal of C4 maize was 41.5%, 34.4% and 42.9% higher than the PItotal of C3 soybean at the first (D1), second (D2) and third (D3) measurements under optimal environmental conditions. The difference increased to 140.3%, 104.8% and 52% in D1, D2 and D3 of the imposed low-temperature treatment, respectively. Maize exhibited greater PSII damage at low temperatures, indicating a weaker coping and repair mechanism compared to soybean. Soybean demonstrated a better adaptive response by reducing overall photosynthetic efficiency. The better adaptation to low temperatures in soybean compared to maize was evidenced by a lower loss of water tissue and dry matter.

Keywords

PI total; photosynthesis; soybean; maize; climate change

Hrčak ID:

320925

URI

https://hrcak.srce.hr/320925

Publication date:

23.9.2024.

Article data in other languages: croatian

Visits: 0 *