Ethylene production by gynoecium and receptacle is associated with sepal abscission in cut Delphinium flowers |
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| Affiliation: | 1. Institute of Radiation Medicine, Fudan University, Shanghai, China;2. Central Laboratory, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China;1. Department of VehicleEngineering The School of Mechanical and Power Engineering Henan Polytechnic University, Jiaozuo 454003, China;2. Department of Engineering and Design The School of Engineering and Informatics The University of Sussex, Falmer, Brighton BN1 9QT, UK;1. School of Software, Tsinghua University, Beijing, China;2. Key Lab for Information System Security, Ministry of Education, Beijing, China;3. National Laboratory for Information Science and Technology, Beijing, China;4. Logistical Engineering University, Chongqing, China;5. Queensland University of Technology, Brisbane, Australia;6. Eindhoven University of Technology, Eindhoven, The Netherlands;1. State Key Laboratory of Crop Genetics and Germplasm Enhancement, Cytogenetics Institute, Nanjing Agricultural University, Nanjing 210095, China;2. Wheat Research Center, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China |
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| Abstract: | Delphinium flowers are sensitive to ethylene, and exposure to ethylene is known to accelerate sepal abscission. The relationship of ethylene to sepal abscission in cut Delphinium flowers was investigated. The gynoecium and receptacle each contributed to climacteric-like increases in ethylene production whereas the sepals, petals and stamens did not. 1-Aminocyclopropane-1-carboxylic acid (ACC) concentration, ACC synthase and ACC oxidase activities in the gynoecium and receptacle increased in the senescing flowers. Wounding of the gynoecium or receptacle accelerated abscission of sepals, which was accompanied by a marked increase in ethylene production. Accelerated sepal abscission was counteracted by treatment with silver thiosulphate complex (STS), an inhibitor of ethylene action. The results of this study show that ethylene produced by the gynoecium and receptacle is closely associated with sepal abscission in cut Delphinium flowers. |
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