Effects of plant growth-promoting rhizosphere on growth, physiological adaptability and soil properties of Osmanthus fragrans

CHEN Dingyi, ZHANG Xiaofeng, HUANG Jiurong, WANG Lianggui, YANG Xiulian

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2026, Vol. 50 ›› Issue (2) : 196-204.

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2026, Vol. 50 ›› Issue (2) : 196-204. DOI: 10.12302/j.issn.1000-2006.202409039

Effects of plant growth-promoting rhizosphere on growth, physiological adaptability and soil properties of Osmanthus fragrans

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Abstract

【Objective】This study investigated the effects of inoculating Osmanthus fragrans with two plant growth-promoting rhizobacteria (PGPR), Yokenella regensburgei and Pseudomonas mosselii, to provide a reference for future PGPR application in O. fragrans cultivation.【Method】PGPR strains isolated from O. fragrans rhizosphere soil were selected for a pot experiment. One-year-old O. fragrans seedlings were inoculated with Y. regensburgei, P. mosselii, or left untreated (control group) to assess the impacts of PGPR on plant growth, physiological adaptation, and rhizosphere soil properties.【Result】Both PGPR strains promoted plant height and increased root fresh weight, stem fresh weight, root length, and stem length. Y. regensburgei demonstrated a more significant effect on the growth characteristics of O. fragrans. Both PGPR treatment could significantly enhance the CAT of O. fragrans. PGPR application increased soil organic matter content but did not significantly alter soil pH, electrical conductivity, available phosphorus, or available potassium content.【Conclusion】The PGPR strains Y. regensburgei and P. mosselii improved the rhizosphere soil environment and enhanced the growth and physiological processes of O. fragrans, with Y. regensburgei exhibiting superior overall efficacy. These screened strains offer potential for developing specialized microbial fertilizers for O. fragrans, thereby advancing novel fertilizer research and promoting the growth of this plant species.

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Osmanthus fragrans / plant growth-promoting rhizobacteria / growth promoting ability / growth and physiological adaptability / soil properties

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CHEN Dingyi , ZHANG Xiaofeng , HUANG Jiurong , et al . Effects of plant growth-promoting rhizosphere on growth, physiological adaptability and soil properties of Osmanthus fragrans[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2026, 50(2): 196-204 https://doi.org/10.12302/j.issn.1000-2006.202409039

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