Long-term fertilization has different impacts on bacterial communities and phosphorus forms in sugarcane rhizosphere and bulk soils under low-P stress

Abstract

The application of phosphorus (P) fertilizer effectively improves soil P availability, but it also affects soil microbial communities. However, the responses of soil bacterial communities and P forms to long-term P fertilization, and the relationships of bacterial communities with soil P forms remain unclear in P-deficient field. In this study, the impacts of different P fertilization treatments (chemical nitrogen and potassium (NK); chemical N, P and K (NPK); and NPK plus straw (NPKS)) on the bacterial communities and P forms in sugarcane rhizosphere (RS) and bulk soils (BS) were evaluated. Compared with the NK, the NPK and NPKS treatments significantly (P<0.05) increased the yield and quality characters of sugarcane, especially under NPKS. Additionally, P fertilization significantly increased the available P (AP), soluble inorganic P (Pi) and retained Pi in both the RS and BS, but they significantly increased the Chao1 and Shannon index only in the BS; and almost all these indices were significantly higher in the RS than in the BS. The bacterial community compositions were also significantly altered by P fertilization, with major changes in the RS and minor changes in the BS. The bacterial genera that were enriched in the sugarcane rhizosphere mainly included Bradyrhizobium, Rhodanobacter, Pseudolabrys, Conexibacter, and Burkholderia-Caballeronia-Paraburkholderia, some of which potentially promote the plant growth. Compared to NK, functional groups involved in the cycling of carbon, N, and sulfur significantly increased or decreased with fertilizer P application. Moreover, the relative abundances of many bacterial species were significantly correlated with the soil P forms. In conclusion, long-term P fertilization altered bacterial structure and functions in P-deficient sugarcane soil, which could help the soil P cycling and suppling. The results provide useful information to stimulate the power of the microbes by fertilization measures to improve soil nutrients and crop production.

The Role of Rhizosphere Microorganisms and CNPS Genes in Shaping Nutritional Traits of Capsicum

“…The analysis revealed that the abundance of N/P-associated genes was closely correlated with bacterial network clusters in module #8 and module #15, as well as the changes in TN and TP content in different parts of the pepper plants. Interestingly, certain microbial genera, such as Jatrophihabitans , Conexibacter (Wu et al ., 2022), Rhodanobacter (Wang et al ., 2022; Wu et al ., 2022), f_ 67-14 , Acidibacter (Song et al ., 2022), f_ Microscillaceae , and f_ Chitinophagaceae , were found to be enriched in specific pepper varieties and likely play significant roles in N/P cycling. On the other hand, high-abundance genera in YZ and BE cultivars, including Arthrobacter , Nitrosospira , Frankiales , Bacillus , Lysobacter , Sorangium , Conexibacter , and Leifsonia , have been reported to be involved in nitrification or nitrogen fixation processes (Hu et al ., 2021; Sellstedt and Richau, 2013; Wen et al ., 2022; Yu et al ., 2022).…”

“…The analysis revealed that the abundance of N/P-associated genes was closely correlated with bacterial network clusters in module #8 and module #15, as well as the changes in TN and TP content in different parts of the pepper plants. Interestingly, certain microbial genera, such as Jatrophihabitans, Conexibacter (Wu et al, 2022), Rhodanobacter Wu et al, 2022), f_67-14, Acidibacter (Song et al, 2022), f_Microscillaceae, and f_Chitinophagaceae, were found to be enriched in specific pepper varieties and likely play significant roles in N/P cycling. On the other hand, high-abundance genera in YZ and BE cultivars, including…”

The host sex contributes to the endophytic bacterial community in Sargassum thunbergii and their receptacles

“…The core endophytic bacteria in S. thunbergii included the genus Sva0996_marine_group, which is related to the metabolism of alga-derived substances (Orsi et al, 2016), the dimethylsulfoniopropionate (DMSP) degrader Loktanella (Sun et al, 2020), and pollutant-degrading bacteria, such as the phenanthrene (PHE)-degrading bacterium Acinetobacter (Li et al, 2017), the polyaromatic hydrocarbon (PAH)-degrading bacterium Pseudoruegeria (Yuan, 2008), and the hydrocarbondegrading bacteria Granulosicoccus (Rizzo et al, 2019) and Robiginitomaculum (Verhoeven et al, 2017). In addition, there were some bacteria that can promote and inhibit the growth of algae, such as Burkholderia-Caballeronia-Paraburkholderia (Wu et al, 2022), Enhydrobacter (Dartora et al, 2016), and Maribacter (Ghaderiardakani et al, 2019). This indicated that the composition of endophytic bacteria was closely related to the external environment and host alga.…”

Long-Term Chemical Fertilization Drove Beneficial Bacteria for Rice Soil to Move from Bulk Soil to the Rhizosphere

“…Many studies have reported the effects of soil quality, soil fertility, the soil microbial community, and crop growth indicators on yield with long-term CF application. However, few studies [31,32] have investigated the effects of the bacterial community structure in rhizospheric and bulk soils after long-term CF application. For this reason, in the present study, the effects of long-term (12-year) CF application on bacterial community structures in rhizospheric and bulk soils of rice were investigated through a 12-year field experiment.…”