Blue light and ultraviolet-A(UV-A)radiation are critical light-quality regulators that coordinately modulate plant growth and quality in protected horticulture.However,their interactive effects on celery(Apium graveol...Blue light and ultraviolet-A(UV-A)radiation are critical light-quality regulators that coordinately modulate plant growth and quality in protected horticulture.However,their interactive effects on celery(Apium graveolens L.)remain inadequately characterized.In the present study,we quantified the individual and combined impacts of supplemental UV-A and blue light on the growth,biomass accumulation,photosynthetic performance,and nutritional quality of celery(cv.Dayehuang)in a plant factory with artificial lighting.Our results demonstrated that sole UV-A or blue light application significantly increased biomass,nutritional quality,and light use efficiency(LUE)of celery.Notably,combined supplementation with UV-A and blue light did not enhance chlorophyll content,biomass accumulation,or nutritional quality in celery relative to supplementation with either light quality alone.The principal component analysis(PCA)score plot exhibited clear separation among the four light treatments,with the UV-A treatment distinctly separated along the positive PC1 axis.Our findings demonstrate that UV-A and blue light regulate plant growth and quality via interactive rather than additive effects.Additionally,sole UV-A irradiation significantly improved celery growth and LUE.These findings provide a theoretical foundation for optimizing the light environment for celery under protected cultivation.展开更多
基金the Priority Academic Program Development of Jiangsu Higher Education Institutions(No.PAPD-2023-87)Jiangsu Provincial Frontier Technology R&D Program(Modern Agriculture)(No.BF2025314)+3 种基金the Modern Agricultural Industrial Technology System of Shandong Province(No.SDAIT-05)the Key Research and Development Program of Shandong Province(2021TZXD007)Youth Innovation Team Plan of Colleges and Universities of Shandong Province(2023KJ167)the Foundation for High-level Talents of Qingdao Agricultural University(6631120098).
摘要Blue light and ultraviolet-A(UV-A)radiation are critical light-quality regulators that coordinately modulate plant growth and quality in protected horticulture.However,their interactive effects on celery(Apium graveolens L.)remain inadequately characterized.In the present study,we quantified the individual and combined impacts of supplemental UV-A and blue light on the growth,biomass accumulation,photosynthetic performance,and nutritional quality of celery(cv.Dayehuang)in a plant factory with artificial lighting.Our results demonstrated that sole UV-A or blue light application significantly increased biomass,nutritional quality,and light use efficiency(LUE)of celery.Notably,combined supplementation with UV-A and blue light did not enhance chlorophyll content,biomass accumulation,or nutritional quality in celery relative to supplementation with either light quality alone.The principal component analysis(PCA)score plot exhibited clear separation among the four light treatments,with the UV-A treatment distinctly separated along the positive PC1 axis.Our findings demonstrate that UV-A and blue light regulate plant growth and quality via interactive rather than additive effects.Additionally,sole UV-A irradiation significantly improved celery growth and LUE.These findings provide a theoretical foundation for optimizing the light environment for celery under protected cultivation.