Rhizobacterial communities and fine root traits together reveal variations in growth performance of Quercus acutissima i
- PDF / 1,680,391 Bytes
- 15 Pages / 595.276 x 790.866 pts Page_size
- 63 Downloads / 147 Views
ORIGINAL PAPER
Rhizobacterial communities and fine root traits together reveal variations in growth performance of Quercus acutissima in different provenances Xiangrong Cheng1 · Haijing Yuan1 · Haidong Xu1 · Wenli Xing1 · Yangdong Wang1 · Mukui Yu1 Received: 27 February 2020 / Revised: 13 August 2020 / Accepted: 26 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract It is important to understand the variations in intraspecific growth performance for forest management. We evaluated the relationships among fine root traits, rhizobacterial community structure, and growth variables in different oak (Quercus acutissima) provenances. Four oak provenances with different growth performances were studied. In each provenance, growth variables, fine root traits, rhizosphere soil chemical properties, and rhizobacterial abundance were measured. The structure of rhizobacterial communities was assessed by 16S rRNA gene sequencing. The co-occurrence patterns of bacterial taxa were analyzed by network analysis. The relative contribution of fine root traits and rhizobacterial communities to variations in growth performance was evaluated by hierarchical partitioning analysis. Growth performance of the four oak provenances was positively correlated with the specific root length. The β-diversity of rhizobacterial communities, but not α-diversity, was positively correlated with the growth variables. The relative abundance of Actinobacteria (e.g., Actinospica and Conexibacter genera) increased with aboveground biomass. The co-occurrence network analysis showed more clusters with highly interconnected taxa in the high-yielding provenances. Variation in growth performance of oak in different provenances was significantly affected by the rhizobacterial community structure and fine root traits, with the former being a more prominent factor. Keywords Bacterial community · Fine root · Growth performance · Oak provenance · Rhizosphere Abbreviations DBH Diameter at breast height (cm) AGB Aboveground biomass (kg tree−1) SRL Specific root length (m g−1) RN N concentration in fine roots (mg kg−1) RP P concentration in fine roots (mg kg−1) RN:RP Ratio of N to P concentration in fine roots SOC Organic carbon in the rhizosphere soil (g kg−1)
AN Alkali-hydrolysable nitrogen in the rhizosphere soil (g kg−1) AP Available phosphorus in the rhizosphere soil (mg kg−1) AK Available potassium in the rhizosphere soil (mg kg−1) pH Acidity and alkalinity of the rhizosphere soil
Introduction Communicated by Oliver Gailing. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10342-020-01312-5) contains supplementary material, which is available to authorized users. * Mukui Yu [email protected] 1
East China Coastal Forest Ecosystem Long‑term Research Station, Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, Zhejiang, People’s Republic of China
Quercus acutissima, native to eastern Asia, is one of the most abundant oak species in China. It
Data Loading...
