The molecular mechanism for improvement of coastal silt soil by the intercropping model of Suaeda glauca (Bunge) Bunge and Sesbania cannabina (Retz.) Pers
Xiaochi An, Ying Li, Yinhua Cao, Zaifeng Wang, Min Xu, Bin Lian
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引用次数: 0
Abstract
Aims
The eastern coastal regions of China, which are undergoing rapid economic development, are characterized by extensive areas of coastal silt soil (CSS) with poor permeability, high salinity, and nutrient scarcity, necessitating immediate remediation.
Methods
Based on the intercropping pattern of Suaeda glauca (Bunge) Bunge and Sesbania cannabina (Retz.) Pers., the molecular mechanism of this intercropping pattern on the CSS improvement, and the rhizosphere microbial community adaptability of the two intercropping plants, were researched by means of metagenomics analysis, soil physicochemical properties, plant growth status.
Results
The results demonstrated that the improvement of soil salinity and alkalinity was positively correlated with the growth of S. glauca. Conversely, the growth of S. cannabina, was positively correlated with the significant increase in the contents of soil TN and TOC. Metagenomic analysis indicated that the rhizosphere of S. cannabina intercropped with S. glauca was enriched with bacteria related to nitrogen-cycle, which could assist biological nitrogen-fixation, thereby enhancing soil fertility and also promoting the growth of S. glauca; moreover, the two-component system in the rhizosphere microbial community of S. cannabina was enhanced to adapt better to saline-alkali stress. Due to the characteristics of salt-accumulation, the rhizosphere microenvironment of S. glauca was highly saline, and its rhizosphere microorganisms mainly resisted, and adapted to, the high-salt environment by promoting carbohydrate metabolism and energy metabolism.
Conclusions
This study confirms that intercropping S. glauca with S. cannabina is an effective strategy for improvement of saline-alkali soil, providing a new method for management and sustainable development of CSS.
期刊介绍：
Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.
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