热带作物学报2026，Vol.47Issue(3)：667-675,9.DOI:10.3969/j.issn.1000-2561.2026.03.011
生物基碳量子点对火龙果光合因子及产量的调控效应
Effects of Bio-based Carbon Quantum Dots on Photosynthetic Factors and Yield in Pitaya(Hylocereus undatus Britt)
摘要
Abstract
The study addressed the industrial challenges of low flowering rate and reduced yield in off-season pitaya cultivation caused by light and temperature limitations in tropical regions.By leveraging the unique advantages of bio-based carbon quantum dots(CQDs)in enhancing photosynthesis and stress resistance,we systematically investi-gated the regulatory effects on the photosynthetic characteristics,yield,and fruit quality of pitaya.Using four-year-old Taiwan No.6 red-fleshed pitaya as the plant material,different concentrations of CQDs(CDS200,CDS250,CDS300,CDS500)and the combinations with nutritional elements(coCDS300,coCDS500,coCDS800)were applied.Through field trials conducted in both summer and winter seasons,the dynamic changes in Rubisco activity,chlorophyll content,flowering characteristics,yield,and fruit quality were systematically investigated.Results demonstrated that during summer,CDS250 and coCDS300 rapidly increased Rubisco activity by 41.05％and 20.46％respectively compared to con-trol,while composite treatments consistently outperformed single CQD applications.In winter,high-concentration treatments(CDS200,CDS250)exhibited a"rapid activation-fast decline"pattern in enzyme activity,whereas composite treatments maintained elevated Rubisco activity for 14 days.Chlorophyll synthesis was significantly enhanced,with summer CDS200 increasing chlorophyll by 43.89％(versus 10.56％for chlorophyll a),and winter composite treatments elevating chlorophyll b proportion to 61.80％without affecting chlorophyll a.Notably,CQDs significantly promoted winter flowering with concentration-dependent effects,where CDS500 showed the most prominent increase(141.80％),followed by coCDS300 and CDS300.Yield analysis revealed CDS300 achieved 115.60％yield increase,while high-concentration CDS200 showed weakest effects,consistent with its regulation on Rubisco activity,chlorophyll con-tent and flowering.The premium fruit ratio reached 80.91％under coCDS300,with all composite treatments outper-formed single CQD groups.Winter yield enhancement(58.24％)markedly exceeded summer gains(27.19％).The re-search demonstrates that bio-based CQDs significantly enhance pitaya yield and quality by regulating photosynthetic systems and reproductive growth,with particularly prominent effects under low-light conditions in winter,providing technical support for off-season cultivation of tropical fruit trees.关键词
火龙果/生物基碳量子点/光合因子/Rubisco/叶绿素/产量Key words
Hylocereus undatus Britt/bio-based carbon quantum dots/photosynthetic factors/Rubisco/chlorophyll composition/yield分类
农业科技引用本文复制引用
王帆林,简纯平,成宏斌,潘晓翠,张熠莹,吴福星..生物基碳量子点对火龙果光合因子及产量的调控效应[J].热带作物学报,2026,47(3):667-675,9.基金项目
海南省南海新星科技创新人才平台项目(No.NHXXRCXM202371) （No.NHXXRCXM202371）
海南省自然科学基金企业人才项目(No.325QY917) （No.325QY917）
三亚崖州湾科技城高新区"崖州湾"菁英人才项目(No.SKJC-JYRC-2025-28). （No.SKJC-JYRC-2025-28）
