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Silicon Application Modulates the Growth, Rhizosphere Soil Characteristics, and Bacterial Community Structure in Sugarcane

文献类型： 外文期刊

作者： Deng, Quanqing 1 ; Yu, Taobing 3 ; Zeng, Zhen 1 ; Ashraf, Umair 4 ; Shi, Qihan 3 ; Huang, Suihua 1 ; Lian, Tengxiang 3 ;

作者机构： 1.South China Agr Univ, Coll Agr, Guangzhou, Peoples R China

2.South China Agr Univ, Sugarcane Res Lab, Guangzhou, Peoples R China

3.South China Agr Univ, State Key Lab Conservat & UtilZat Subtrop Agrobio, Guangzhou, Guangdong, Peoples R China

4.Univ Educ, Dept Bot, Div Sci & Technol, Lahore, Pakistan

5.Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou, Peoples R China

6.Ayub Agr Res Inst, Sugarcane Res Inst, Faisalabad, Pakistan

关键词： silicon; sugarcane; illumina miseq sequencing; soil enzymes activities; soil properties; bacterial community structure; association network analysis

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.754； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2021 年 12 卷

页码：

收录情况： SCI

摘要： Silicon (Si) deficiency, caused by acidic soil and rainy climate, is a major constraint for sugarcane production in southern China. Si application generally improves sugarcane growth; however, there are few studies on the relationships between enhanced plant growth, changes in rhizosphere soil, and bacterial communities. A field experiment was conducted to measure sugarcane agronomic traits, plant nutrient contents, rhizosphere soil enzyme activities and chemical properties, and the rhizosphere bacterial community diversity and structure of three predominant sugarcane varieties under two Si treatments, i.e., 0 and 200 kg of silicon dioxide (SiO2) ha(-1) regarded as Si0 and Si200, respectively. Results showed that Si application substantially improved the sugarcane stalk fresh weight and Si, phosphorus (P), and potassium (K) contents comparing to Si0, and had an obvious impact on rhizosphere soil pH, available Si (ASi), available P (AP), available K (AK), total phosphorus (TP), and the activity of acid phosphatase. Furthermore, the relative abundances of Proteobacteria showed a remarkable increase in Si200, which may be the dominant group in sugarcane growth under Si application. Interestingly, the AP was noticed as a major factor that caused bacterial community structure differences between the two Si treatments according to canonical correspondence analysis (CCA). In addition, the association network analysis indicated that Si application enriched the rhizosphere bacterial network, which could be beneficial to sugarcane growth. Overall, appropriate Si application, i.e., 200 kg SiO2 ha(-1) promoted sugarcane growth, changed rhizosphere soil enzyme activities and chemical properties, and bacterial community structures.

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