外源褪黑素对日光温室越冬茬辣椒生长及果实品质的影响

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中图分类号：S641.3 文献标识码：A 文章编号： 1000-4440（2025）09-1811-11

Abstract：Toexplore the efects of exogenous melatoninonthe growthand fruit qualityof pepper plants insolar greenhouses during the overwintering season，this studyused pepper Huamei 1O5asthe experimental materialand sprayed wateras the control（CK）.Different concentrations（ 50μmol/L ， 100μmol/L ， 150μmol/L ， 200μmol/L ）of melatonin solution were sprayed on the leaves at 10d ， 16d 22d ，28d and 34 d after flowering.The growth parameters，photosynthetic characteristics andfruitqualityindicatorsof pepperplants atdiferentstages afterflowering were measured.Theresultsshowed that 100μmol/L melatonin treatment could significantly increase the photosynthetic pigment content of pepper leaves，enhance the activityofCalvincycle-related enzymesand photosyntheticcapacity，promote plant growth，ndimprove pepperyieldandfruit quality.The free aminoacidcontent，soluble proteincontent，vitamin Ccontent，solublesugarcontentandhardnesof peppe fruitstreatedwith100 ∣μmol/L melatonin were significantly higher than those of the CK，while the nitrate content of fruitswas significantly lower than that of the CK.In summary，foliar spraying ofdifferent concentrations ofmelatonin solution can increase pepper yield and improve fruit quality. Among them， 100μmol/L melatonin solution treatment has the best effect on pepper yield and fruit quality.

Key words：pepper；exogenous melatonin；photosynthesis；yield；quality

棘椒（CapsicumannuumL.）为茄科辣椒属一年生或多年生草本植物。（剩余18013字）