期刊
HORTICULTURAE
卷 7, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/horticulturae7080228
关键词
glomalin; mineral composition; mycorrhiza; nutritional quality; sweet orange
类别
资金
- Plan in Scientific and Technological Innovation Team of Outstanding Young Scientists, Hubei Provincial Department of Education [T201604]
- Hubei Agricultural Science and Technology Innovation Action Project [1]
- King Saud University, Riyadh, Saudi Arabia [RSP-2021/134]
The study found that foliar application of easily extractable glomalin-related soil protein (EE-GRSP) significantly increased mycorrhizal development in sweet orange trees and improved fruit quality, enhancing external quality and nutrient content in the flesh.
The role of arbuscular mycorrhizal fungi in sweet oranges is well known, but the function of their secondary metabolite, especially the easily extractable glomalin-related soil protein (EE-GRSP), an active fraction of glomalin, is still unclear. The proposed study aimed to analyze the field response of foliar application of exogenous EE-GRSP on tree mycorrhizal development and fruit quality of two sweet orange (Citrus sinensis L. Osbeck) varieties viz., Lane Late Navel (LLN) and Rohde Red Valencia (RRV). Application of EE-GRSP significantly increased the root mycorrhizal colonization and soil mycorrhizal hyphal length in both the sweet orange varieties. The external quality of fruits (fruit weight, polar diameter, and equatorial diameter) also improved in response to foliar application of EE-GRSP in both sweet orange varieties. However, EE-GRSP treatment showed no change in fruit soluble solid content, while it increased the Vc content, solids-acid ratio, fructose, glucose, and sucrose content of sarcocarp in the two sweet oranges varieties. The LLN variety treated with EE-GRSP recorded significantly higher N, P, K, Fe, and Si content of sarcocarp as a mark of nutritional quality, while the RRV variety treated with EE-GRSP displayed a higher concentration of nutrients like Cu, Fe, Si, and Zn in the sarcocarp as compared with the corresponding non-treated control. To the best of our knowledge, this is the first report regarding the improvement in fruit quality of late-ripening sweet oranges (especially LLN) in response to foliar application of EE-GRSP as another potential biostimulant.
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