Co-elevated CO2 concentration and temperature enhance the carbon assimilation and lipid metabolism in a high-oil soybean (Glycine max (L.) Merr.) variety

Co-elevated CO2 concentration and temperature enhance the carbon assimilation and lipid metabolism in a high-oil soybean (Glycine max (L.) Merr.) variety

Copyright © 2025 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 228(2025) vom: 15. Juli, Seite 110243
1. Verfasser: Gong, Zehua (VerfasserIn)
Weitere Verfasser: Zhang, Xiaoqin, Zong, Yuzheng, Zhang, Dongsheng, Shi, Xinrui, Hao, Xingyu, Li, Ping
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2025
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Carbon metabolism Elevated CO(2) concentration Increased temperature Lipid Metabolism Soybean
Beschreibung
Zusammenfassung:Copyright © 2025 Elsevier Masson SAS. All rights reserved.
Global climate changes, such as elevated CO2 concentrations (eCO2) and rising temperatures, trigger complex interactions that collectively affect soybean growth and seed quality. To investigate the effects of eCO2 and elevated temperature on carbon and lipid metabolism in soybeans, the high-oil Zhonghuang35 (ZH35) and the low-oil soybean Jindazaohuang2 (JZ2) were used in this study. Four treatments were set up in the controlled air chambers. They were CK (ambient [CO2] and temperature), EC (ambient [CO2] +200 μmol mol-1 and ambient temperature), ET (ambient [CO2] and ambient temperature +2 °C), and ECT (ambient [CO2] +200 μmol mol-1 and ambient temperature +2 °C). Photosynthetic parameters, chlorophyll content, and indicators of glucose metabolism and lipid metabolism were assessed in soybean at the R4 growth stage. ECT significantly increased plant height, biomass and grain weight in both varieties (p < 0.05), with ZH35 showing slightly greater increases. Conversely, ECT significantly reduced main stem node number by 12.7 % in JZ2 (p < 0.05). Chlorophyll (Chl) content decreased significantly in JZ2 under EC and ECT, and in ZH35 under ET and ECT. Rubisco activity (+116.1 %) and net photosynthetic rate (Pn, +29.1 %) increased in ZH35 under ECT compared with CK (p < 0.05), but Pn declined in JZ2 (-23.5 %). ECT significantly enhanced water-use efficiency by 66.5 % in JZ2. Isocitrate dehydrogenase (ICDH) activity decreased in both JZ2 (-49.2 %) and ZH35 (-66.9 %) under ECT, suggesting a weakened tricarboxylic acid (TCA) cycle. However, sucrose metabolism was enhanced under EC in both cultivars as indicated by increased sucrose content (+43.8 % in JZ2 and +68.8 % in ZH35). ECT significantly upregulated diacylglycerol acyltransferase (DGAT) gene expression by 19.3 % in JZ2 and 158.3 % in ZH35 (both p < 0.05). Concurrently, DGAT activity increased by 1199.4 % in JZ2 and 111.8 % in ZH35 (both p < 0.05).These changes were accompanied by increased oil content by 12.6 % in JZ2 and 10.8 % in ZH35 compared with CK (both p < 0.05). The co-elevation of [CO2] and temperature enhanced lipid metabolism in both cultivars. Enhanced carbon assimilation and lipid metabolism in ZH35 suggest that high-oil soybean varieties may exhibit greater resilience under climate change scenarios
Beschreibung:Date Revised 19.07.2025
published: Print-Electronic
Citation Status Publisher
ISSN:1873-2690
DOI:10.1016/j.plaphy.2025.110243