气候变化领域集成服务门户(CCPortal): Differential physiological and production responses of C3 and C4 crops to climate factor interactions

CCPortal

DOI	10.3389/fpls.2024.1345462
	Differential physiological and production responses of C3 and C4 crops to climate factor interactions
	Opoku, Emmanuel; Sahu, Pranav Pankaj; Findurova, Hana; Holub, Petr; Urban, Otmar; Klem, Karel
发表日期	2024
ISSN	1664-462X
起始页码	15
卷号	15
英文摘要	This study examined the effect of the interactions of key factors associated with predicted climate change (increased temperature, and drought) and elevated CO2 concentration on C3 and C4 crop representatives, barley and sorghum. The effect of two levels of atmospheric CO2 concentration (400 and 800 ppm), three levels of temperature regime (21/7, 26/12 and 33/19 degrees C) and two regimes of water availability (simulation of drought by gradual reduction of irrigation and well-watered control) in all combinations was investigated in a pot experiment within growth chambers for barley variety Bojos and sorghum variety Ruby. Due to differences in photosynthetic metabolism in C3 barley and C4 sorghum, leading to different responses to elevated CO2 concentration, we hypothesized mitigation of the negative drought impact in barley under elevated CO2 concentration and, conversely, improved performance of sorghum at high temperatures. The results demonstrate the decoupling of photosynthetic CO2 assimilation and production parameters in sorghum. High temperatures and elevated CO2 concentration resulted in a significant increase in sorghum above- and below-ground biomass under sufficient water availability despite the enhanced sensitivity of photosynthesis to high temperatures. However, the negative effect of drought is amplified by the effect of high temperature, similarly for biomass and photosynthetic rates. Sorghum also showed a mitigating effect of elevated CO2 concentration on the negative drought impact, particularly in reducing the decrease of relative water content in leaves. In barley, no significant factor interactions were observed, indicating the absence of mitigating the negative drought effects by elevated CO2 concentration. These complex interactions imply that, unlike barley, sorghum can be predicted to have a much higher variability in response to climate change. However, under conditions combining elevated CO2 concentration, high temperature, and sufficient water availability, the outperforming of C4 crops can be expected. On the contrary, the C3 crops can be expected to perform even better under drought conditions when accompanied by lower temperatures.
英文关键词	photosynthetic metabolism; Hordeum vulgare; Sorghum bicolor; biomass production; physiology; warming; elevated CO2 concentration; water stress
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001162884900001
来源期刊	FRONTIERS IN PLANT SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/291031
作者单位	Czech Academy of Sciences; Global Change Research Centre of the Czech Academy of Sciences; Mendel University in Brno
推荐引用方式 GB/T 7714	Opoku, Emmanuel,Sahu, Pranav Pankaj,Findurova, Hana,et al. Differential physiological and production responses of C3 and C4 crops to climate factor interactions[J],2024,15.
APA	Opoku, Emmanuel,Sahu, Pranav Pankaj,Findurova, Hana,Holub, Petr,Urban, Otmar,&Klem, Karel.(2024).Differential physiological and production responses of C3 and C4 crops to climate factor interactions.FRONTIERS IN PLANT SCIENCE,15.
MLA	Opoku, Emmanuel,et al."Differential physiological and production responses of C3 and C4 crops to climate factor interactions".FRONTIERS IN PLANT SCIENCE 15(2024).