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Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (6): 1135-1149.doi: 10.16420/j.issn.0513-353x.2020-0094

• Research Papers • Previous Articles     Next Articles

Effects of Ethylene Metabolism and Energy Status on Vase Quality of Cut Itoh Peony‘Bartzella’Flowers

WANG Yi1, WANG Kaixuan1,2,3, HU Siyuan1, ZHOU Shuang1, SHI Guoan1,*()   

  1. 1Luoyang Key Laboratory of Peony Biology,College of Tree Peony,Henan University of Science and Technology,Luoyang,Henan 471023,China
    2Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture,Wuhan Botanical Garden,Chinese Academy of Sciences,Wuhan 430074,China
    3University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2021-02-09 Revised:2021-03-28 Online:2021-06-25 Published:2021-07-07
  • Contact: SHI Guoan E-mail:gashi1963@163.com

Abstract:

The regulatory effects of ethylene metabolism and energy status on the vase quality of cut Itoh peony‘Bartzella’flowers were studied by using nano silver and preservative solution treatment. Cut Itoh peony flowers with a developmental level of stageⅡwere employed as test materials and were pretreated with distilled water(the control)or 20 mg · L-1 nano silver(NS)for 2 h. The samples were then vased in preservative solution(PS)directly after distilled water treatment or after nano silver treatment (NS + PS). The release rate of ethylene,the contents of 1-aminocyclopropane-1-carboxylic acid(ACC),adenine nucleotides(ATP + ADP + AMP),sugar,and the activities of enzymes related to ethylene and sugar metabolism during the vase insertion process were measured. The results demonstrated that nano-silver pretreatment(NS)inhibited the peak of ethylene release by 40.9%,and reduced ACC content and ACC synthetase(ACS)activity,while increased the activities of succinic dehydrogenase(SDH)and H+-ATPase,and contents of sugar and ATP,which maintained a high energy charge(EC)level,therefore,prolonged vase life by 40.7 h. The PS also inhibited the peak of ethylene release by 35.1%,and increased SDH activity and sugar and ATP contents,which maintained a high EC value,and increased the maximum flower diameter by 3.5 cm. Moreover,NS + PS group showed inhibition of ethylene release peak by 31.2%,and reduction of ACC content and ACS activity,while SDH,CCO,and H+-ATPase activities,and the contents of sugar and ATP were all increased,which also maintained high EC levels and increased the soluble protein content,and therefore,increased flower vase life by 46.4 h,and the maximum flower diameter by 3.6 cm. The results showed that inhibition of ethylene metabolism and enhancement of energy status could delay the senescence and improve the vase quality of Itoh peony‘Bartzella’cut flowers.

Key words: tree peony, cut flower, ethylene metabolism, energy status, vase quality

CLC Number: