To investigate the effects of exogenous abscisic acid(ABA)application on tomato blossom-end rot(BER),fruit yield,and quality,an experiment was conducted using the'Hangza 603'pink tomato variety.Tomatoes were sprayed regularly with aqueous solutions of ABA at concentrations of 100,200,and 400 mg·L-1,with water as a control.The incidence of BER,stem diameter,single fruit weight,and other agronomic traits were measured.Additionally,fruit vitamin C(VC)content,soluble solids content,calcium(Ca)content and its distribution were determined.Results showed that compared with the water all ABA concentrations significantly reduced BER incidence,with 200 mg·L-1 and 400 mg·L-1 being the most effective,and no significant difference between them.All ABA treatments increased stem diameter,with no significant differences among concentrations.Treatments with 200 mg·L-1 and 400 mg·L-1 ABA significantly increased petiole diameter,single fruit weight,and the number of healthy fruits,while 100 mg·L-1 ABA had insignificant effects on these traits.The 100 mg·L-1 ABA treatment significantly increased soluble solids and VC contents,whereas the 200 mg·L-1 treatment significantly decreased both.The 400 mg·L-1 ABA treatment significantly decreased soluble solids but significantly increased VC content.Notably,200 mg·L-1 ABA enhanced total Ca content in fruits and leaves,with a particular increase in Ca content in leaf and fruit shoulder parts.In summary,exogenous application of 200 mg·L-1 ABA significantly decreased the BER incidence,significantly increased single fruit weight,the number of healthy fruits and stem diameter.Considering cost factors it was suitable for practical BER control in tomato production to control the BER.The 100 mg·L-1 ABA treatment both significantly reduced BER incidence and improved tomato soluble solids and VC contents,suitable for high-quality tomato cultivation.
维普
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