This study provides deeper insights into the network structure of bacterial communities corresponding to RPE patterns and emphasizes the significance of keystone taxa in RPE variation.Ultrafast electron transfer dynamics is a relevant topic to fundamental as well as many applied areas like femtochemistry, heterogeneous catalysis, surface photochemistry, molecular electronics, solar energy, among others. Moreover, keystone taxa with different C utilization strategies were significantly different between the two growth stages and related closely to different RPE patterns. Caulobacteraceae, Bacillus, and Chitinophagaceae were keystone taxa on Day 30, while Gemmatimonas, Candidatus Koribacter, and Xanthobacteraceae were keystone taxa on Day 75. The different network modules of bacterial community were aggregated in response to RPE pattern variation.
Bacterial community structure significantly changed and tended to shift from r-strategists toward K-strategists with changing labile C: N stoichiometry and soil pH during plant growth stages. The results indicated that negative and positive RPEs occurred on Day 30 and Day 75 after maize planting, respectively. Networks were constructed to identify keystone taxa and to analyze the correlations between network functional modules of bacterial community and C decomposition. Therefore, we conducted an experiment to examine the RPE response to plant growth and nitrogen (N) addition (0 (N0), 150 (N150), and 300 (N300) kg N ha −1) using the 13C natural abundance method in a C 3 soil (paddy soil) - C 4 plant (maize, Zea mays L.) system we then explored the underlying biotic mechanisms using 16S rRNA sequencing techniques. However, it is still uncertain how bacterial community structure regulates RPEs in soil and how RPE patterns respond to plant growth.
Microbial community structure plays a crucial part in soil organic carbon (SOC) decomposition and variation of rhizosphere priming effects (RPEs) during plant growth.
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