Journal of Henan Agricultural Sciences ›› 2022, Vol. 51 ›› Issue (1): 116-124.DOI: 10.15933/j.cnki.1004-3268.2022.01.014

• Horticulture • Previous Articles     Next Articles

Effect of Low Temperature Treatment on Nuclear Morphology and Physiological Indexes of Peony Petals

CHEN Yue1,LIU Huichao1,JIA Wenqing1,HE Songlin1,GUO Yingzi2,ZHU Xiaopei1,WANG Yanli1,DU Xiaohua1,WANG Zheng2   

  1. (1.Henan Institute of Science and Technology,Xinxiang 453000,China;2.Henan Agricultural University,Zhengzhou 450002,China)
  • Received:2021-08-26 Published:2022-01-15 Online:2022-03-18

低温处理对牡丹花瓣细胞核形态及生理指标的影响

陈悦1,刘会超1,贾文庆1,何松林1,郭英姿2,朱小佩1,王艳丽1,杜晓华1,王政2   

  1. (1.河南科技学院,河南 新乡 453000;2.河南农业大学,河南 郑州 450002)
  • 通讯作者: 贾文庆(1979-),男,河南淮阳人,副教授,博士,主要从事观赏植物资源创新与利用研究。E-mail:jiawq2012@126.com 何松林(1965-),男,河南淮阳人,教授,博士,主要从事观赏植物栽培生理及生物技术研究。E-mail:hsl213@163.com
  • 作者简介:陈悦(1994-),女,河南安阳人,在读硕士研究生,研究方向:观赏园艺学。E-mail:1125332174@qq.com
  • 基金资助:
    国家重点研发计划项目(2018YFD1000401);河南省科技发展计划项目(202102110082)

Abstract: To analyze the cytological mechanism and physiological reasons of peony cut flower senescence at different temperatures,the effect of(25±1)℃(room temperature,contrast),2℃,4℃ and 8℃ on the vase life of peony was studied.The changes of nucleus morphology were observed and analyzed by DAPI,and the variations of protective enzyme(SOD,POD,CAT)activities,malondialdehyde(MDA),soluble protein content and superoxide anion(O-·2)generation rate during the process of flower arrangement in vase were analyzed.The results showed that the longest cut flower life was 17 d at 4,2℃.The order of the effect of different temperature treatments on the vase life of cut flowers was 4℃ =2℃ >8℃ .Low temperature treatment affected the normal rate of nucleus of cut flowers to different degrees. The normal rate of nucleus was basically 4℃>2℃>8℃,and the normal rate of nuclear could be used as an index to measure the health of cut flowers.The activities of SOD,CAT and POD of petals maintained a relatively high level,the petals could effectively remove excess reactive oxygen species and free radicals,and the metabolism was basically balanced,which was the physiological reason for the longer lifespan of cut flowers at 4℃.

Key words: Peony, Cut flower, Low temperature storage, Enzymatic activity, Nuclear

摘要: 为解析不同温度下牡丹凤丹粉切花衰老的细胞学机制及生理原因,以凤丹粉切花为材料,研究(25±1℃(室温对照)、2℃、4℃和8℃处理对牡丹凤丹粉切花瓶插寿命的影响;采用DAPI染色观察分析花瓣细胞核形态变化规律并分析瓶插过程中保护酶[超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)]活性、丙二醛(MDA)含量、可溶性蛋白含量以及超氧阴离子(O-·2)产生速率的变化。结果表明,与对照[室温(25±1)℃]相比,4、2℃处理切花瓶插寿命最长,达17 d,低温处理下切花瓶插寿命依次为4℃=2℃>8℃。低温处理不同程度影响切花细胞核正常率,细胞核正常率基本为4℃>2℃>8℃,细胞核正常率可作为衡量切花健康程度的指标。花瓣SOD、CAT、POD活性保持较高水平,花瓣能有效清除过多的活性氧、自由基,代谢基本保持平衡,是4 ℃下切花寿命较长的生理原因。

关键词: 牡丹, 切花, 低温贮藏, 酶活性, 细胞核

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