Establishment of actinobacteria-Satureja hortensis interactions under future climate CO2-enhanced crop productivity in drought environments of Saudi Arabia

被引:9
作者
Ahmed, Marwa M. [1 ]
Hagagy, Nashwa [2 ,3 ]
AbdElgawad, Hamada [4 ]
机构
[1] King Abdulaziz Univ, Fac Engn, Elect Engn Dept, Jeddah, Saudi Arabia
[2] Univ Jeddah, Coll Sci & Arts Khulis, Dept Biol, Jeddah 21921, Saudi Arabia
[3] Suez Canal Univ, Fac Sci, Bot & Microbiol Dept, Ismailia 41522, Egypt
[4] Beni Suef Univ, Fac Sci, Bot & Microbiol Dept, Bani Suwayf 62521, Egypt
关键词
Actinobacteria; Drought; eCO(2); Satureja hortensis; Metabolites; Biological activity; GROWTH-PROMOTING RHIZOBACTERIA; ARBUSCULAR MYCORRHIZAL FUNGUS; ELEVATED ATMOSPHERIC CO2; ESSENTIAL OIL YIELD; PLANT-GROWTH; WATER-STRESS; ACID-METABOLISM; AMINO-ACIDS; L; EXTRACT; SOIL;
D O I
10.1007/s11356-021-14777-7
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Drought is a significant global constraint on agricultural production and food security. As a promising approach to improve plant growth and yield under challenging conditions, plant growth-promoting actinobacteria has attracted much interest. Further, elevated levels of atmospheric CO2 (eCO(2)) may promote the plant-actinobacteria interactions which could be effective to improve the plant growth for food production. Herein, we have investigated the impact of actinobacteria and/or CO2 on biomass production, photosynthesis, macronutrients, levels of organic acids, amino acids, and essential oils as well as antioxidant activities of Satureja hortensis under water-deficit conditions. Among different actinobacterial isolates evaluated for development of secondary metabolites and biological activities, Ac9 was highly capable of producing flavonoids, and it also showed high antioxidant and microbial activities. It markedly induced the plant growth, photosynthesis, and global metabolic improvement, under water-deficit conditions. Interestingly, treatment with Ac9 in combination with eCO(2) substantially minimized drought stress-induced biomass and photosynthesis reductions in Satureja hortensis. Improved photosynthesis by Ac9 and/or eCO(2) induced the primary and secondary metabolisms in drought-stressed plants. The levels of the majority of the detected organic acids, essential oil, and amino acids were further improved as a result of the synergistic action of Ac9 and eCO(2), as compared to the individual treatments. Furthermore, Ac9 or eCO(2) significantly improved the antioxidant activities in stressed plants; however, much more positive impact was obtained by their synchronous application. Thus, the current study suggests that actinobacterial treatment induces global metabolic changes in water-stressed Satureja hortensis, the effects that have been much more strengthened under eCO(2).
引用
收藏
页码:62853 / 62867
页数:15
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