干旱区生态环境知识资源中心(Arid): CO2 Enrichment Improves the Drought Resistance of Cucumber Seedlings by Improving Antioxidant Capacity and Sucrose Metabolism

Arid

DOI	10.1134/S1021443722060164
	CO2 Enrichment Improves the Drought Resistance of Cucumber Seedlings by Improving Antioxidant Capacity and Sucrose Metabolism
	Li, S. H.; Li, Y. M.; Li, M.; He, X. R.; Jiang, W. L.; Liu, B. B.; Li, Q. M.
通讯作者	Liu, BB
来源期刊	RUSSIAN JOURNAL OF PLANT PHYSIOLOGY
ISSN	1021-4437
EISSN	1608-3407
出版年	2022
卷号	69 期号:6
英文摘要	The global atmospheric CO2 concentration ([CO2]) has sharply risen due to human activities, and it has reached 410 mu mol mol(-1) at present. It is expected that the atmospheric [CO2] will reach approximately 550 mu mol mol(-1) by the middle of the 21st century. The increase in the [CO2] has a certain fertilizing effect on plants. On the other hand, climate warming and precipitation reductions caused by the greenhouse effect will lead to expanding arid areas and aggravated drought, which will restrict plant growth and yield. Therefore, studying the potential physiological mechanism and synergistic effects of an enriched [CO2] combined with environmental stress factors has great significance for understanding plant physiological and ecological processes. We investigated the effects of an enriched [CO2] (800 +/- 40 mu mol mol(-1)) on the antioxidant capacity and sucrose metabolism of cucumber (Cucumis sativus L. cv. 'Jinyou No. 35') seedlings under drought stress (5 or 10% PEG 6000 in nutrient solutions). The results showed that (1) the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were enhanced by the enriched [CO2]; the contents of malondialdehyde (MDA) and hydrogen peroxide (H2O2), as well as the superoxide anion radical (O-2(-)) production rate, in the leaves were reduced; and lipid peroxidation and cytomembrane permeability decreased under drought stress. (2) The enriched [CO2] significantly improved sucrose synthase (SS) activity but decreased sucrose phosphate synthase (SPS) activity under drought stress, resulting in the accumulation of hexose through accelerated sucrose decomposition and inhibited synthesis. Thus, the osmotic potential of cells was reduced, and the water absorption capacity was enhanced. In conclusion, the enriched [CO2] relieved the detrimental effects of drought stress and enhanced the resistance of cucumber plant growth during drought stress through enhanced cellular membrane stability and antioxidative enzyme activities, thus promoting the accumulation of soluble sugar, while the MDA content and accumulation of reactive oxygen species (ROS) were reduced.
英文关键词	Cucumis sativus cucumber enriched [CO2] drought stress membrane lipid peroxidation sucrose metabolism resistance
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000885058300028
WOS关键词	ELEVATED CO2 ; GROWTH ; STRESS ; PEROXIDATION ; RESPONSES ; DYNAMICS ; LEAVES
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394329
推荐引用方式 GB/T 7714	Li, S. H.,Li, Y. M.,Li, M.,et al. CO2 Enrichment Improves the Drought Resistance of Cucumber Seedlings by Improving Antioxidant Capacity and Sucrose Metabolism[J],2022,69(6).
APA	Li, S. H..,Li, Y. M..,Li, M..,He, X. R..,Jiang, W. L..,...&Li, Q. M..(2022).CO2 Enrichment Improves the Drought Resistance of Cucumber Seedlings by Improving Antioxidant Capacity and Sucrose Metabolism.RUSSIAN JOURNAL OF PLANT PHYSIOLOGY,69(6).
MLA	Li, S. H.,et al."CO2 Enrichment Improves the Drought Resistance of Cucumber Seedlings by Improving Antioxidant Capacity and Sucrose Metabolism".RUSSIAN JOURNAL OF PLANT PHYSIOLOGY 69.6(2022).