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Plant Growth and Fruit Quality Response of Strawberry is Improved After Exogenous Application of 24-Epibrassinolide

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Abstract

Foliar application of mineral nutrients, proteins, and plant growth regulators is frequently practiced on strawberries for better yield and extended harvest period. Here, we evaluated the influence of 24-epibrassinolide, a brassinosteroid, on strawberry plant growth, yield, and fruit quality. Healthy strawberry plants were foliar sprayed with 1, 2 and 3 µM 24-epibrassinolide after 100, 115, and 130 days of runner transplantation. Foliar application of 24-epibrassinolide enhanced specific leaf area and root-to-shoot ratio in concentration-dependent manner. Though, root weight ratio and leaf area ratio were also positively influenced with 24-epibrassinolide applications, but plants treated with 2 µM 24-epibrassinolide exhibited maximum response. Overall, better vegetative growth of plants exogenously treated with 3 µM 24-epibrassinolide led to threefold increase in flowering and better fruit harvest index than control plants. Principal component analysis was further employed to delineate concentration-dependent effects of 24-epibrassinolide. Though, foliar application of 1 µM 24-epibrassinolide was positively correlated with fruit pH and 2 µM 24-epibrassinolide application had a promotive impact on leaf area, plant dry weight, and fruit sugars but foliar spray of 3 µM 24-epibrassinolide was most influential in inducing plant vegetative growth (leaf area ratio, specific leaf area, root-to-shoot ratio, root weight ratio and shoot weight ratio), yield (flowers and fruits per plant and harvest index), and quality attributes (sugar–acid ratio, ascorbic acid, and organoleptic characteristics) of strawberry fruits. Conclusively, results suggest that foliar application of 3 µM 24-epibrassinolide favours vegetative growth, enhances yield and improves quality of strawberry fruit.

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Funding

This study was funded by Higher Education Commission, Pakistan (Grant Number: 21-668SRGP) to R. Anwar.

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Contributions

MMA: Conceptualization, Methodology, Data acquisition, Statistical analysis, Writing—original draft, Final approval of the manuscript; RA: Conceptualization, Funding acquisition, Supervision, Writing—reviewing and editing, Final approval of the manuscript; AUM: Designing of the study, Interpretation of data, Writing—reviewing and editing, Final approval of the manuscript; ASK: Interpretation of data, Writing—reviewing and editing, Final approval of the manuscript; SA: Interpretation of data, Writing—reviewing and editing, Final approval of the manuscript; ZH: Writing—reviewing and editing, Final approval of the manuscript; MUH: Writing—reviewing and editing, Final approval of the manuscript; MN: Writing—reviewing and editing, Final approval of the manuscript; FC: Writing—reviewing and editing, Final approval of the manuscript.

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Correspondence to Raheel Anwar.

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The authors have no relevant financial or non-financial interest to disclose.

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Ali, M.M., Anwar, R., Malik, A.U. et al. Plant Growth and Fruit Quality Response of Strawberry is Improved After Exogenous Application of 24-Epibrassinolide. J Plant Growth Regul 41, 1786–1799 (2022). https://doi.org/10.1007/s00344-021-10422-2

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  • DOI: https://doi.org/10.1007/s00344-021-10422-2

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