Effects of shade stress on turfgrasses morphophysiology and rhizosphere soil bacterial communities

作者：Juanjuan Fu, Yilan Luo, Pengyue Sun, Jinzhu Gao, Donghao Zhao, Peizhi Yang, Tianming Hu · 发表于：BMC Plant Biology · 年份：2020 · DOI：10.1186/s12870-020-2300-2 · 被引用次数：73 · 研究领域：Turfgrass Adaptation and Management、Biocrusts and Microbial Ecology、Plant-Microbe Interactions and Immunity

Abstract Background The shade represents one of the major environmental limitations for turfgrass growth. Shade influences plant growth and alters plant metabolism, yet little is known about how shade affects the structure of rhizosphere soil microbial communities and the role of soil microorganisms in plant shade responses. In this study, a glasshouse experiment was conducted to examine the impact of shade on the growth and photosynthetic capacity of two contrasting shade-tolerant turfgrasses, shade-tolerant dwarf lilyturf ( Ophiopogon japonicus , OJ) and shade-intolerant perennial turf-type ryegrass ( Lolium perenne , LP). We also examined soil-plant feedback effects on shade tolerance in the two turfgrass genotypes. The composition of the soil bacterial community was assayed using high-throughput sequencing. Results OJ maintained higher photosynthetic capacity and root growth than LP under shade stress, thus OJ was found to be more shade-tolerant than LP. Shade-intolerant LP responded better to both shade and soil microbes than shade-tolerant OJ. The shade and live soil decreased LP growth, but increased biomass allocation to shoots in the live soil. The plant shade response index of LP is higher in live soil than sterile soil, driven by weakened soil-plant feedback under shade stress. In contrast, there was no difference in these values for OJ under similar shade and soil treatments. Shade stress had little impact on the diversity of the OJ and the LP bacterial communitie...