Abstract:

In order to analyze the effects of graphene oxide(GO),a novel nanomaterial,on plant growth,development,and fruit quality,Micro-Tom tomato was used as the model plant.Parameters measured included seed germination rate,seedling height,stem diameter,photosynthetic efficiency,fruit yield,antioxidant enzyme activities,and the accumulation of internal fruit components such as soluble solids content,lycopene,and vitamin C under varying GO concentration levels.The safety implications of GO application in agriculture and forestry were also evaluated.The results indicated that GO concentrations of 50,100,200 mg/L significantly enhanced seed germination rate,promoted germination,and increased radicle length,with the most pronounced effect observed at 200 mg/L GO.Concentrations of 50,100 mg/L GO exhibited significant positive effects:effectively increasing plant biomass,improving photosynthetic efficiency,enhancing antioxidant enzyme activities within the plants(contributing to the maintenance of redox homeostasis),and simultaneously elevating single-fruit fresh weight and overall yield.Notably,50 mg/L GO significantly increased fruit vitamin C content,directly demonstrating its potential to enhance the nutritional value of tomato fruits.Meanwhile,no detectable accumulation of GO was found in any tissues of the treated tomato plants.This finding provides critical evidence for assessing the biosafety of GO,preliminarily indicating that its plant growth promotion occurred without significant concomitant accumulation.Therefore,an appropriate concentration of GO,particularly 50 mg/L,can function as an efficient and relatively safe plant growth promoter,achieving synergistic improvements in tomato yield and fruit quality.

Key words: Tomato, Graphene oxide, Plant growth and development, Fruit quality, Safety assessment

CLC Number: 

• S13农业化学

• S641.2