首页|基于高温半致死温度的13个牡丹品种耐热性评价

基于高温半致死温度的13个牡丹品种耐热性评价

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以13个代表性牡丹(Paeonia suffruticosa Andr。)品种为试材，利用电导率法、Logistic方程研究高温半致死温度(LT50)，以期评价牡丹种质资源的耐热性。结果表明，在逐步高温处理过程中，13个牡丹品种的细胞伤害率呈典型的S形曲线增长趋势，经显著性检验符合Logistic方程。13个牡丹品种的LT50为51。31～59。73℃，其中B24的LT50最高，为59。73℃，而海黄的LT50最低，为51。31℃。利用有序样品最优分割聚类法，将13个牡丹品种分为3个类群，B24、太平红、B10、凤丹荷和凤丹白属于耐热类型，LT50平均值为57。70℃;香玉、莲鹤、五星玉、岛锦和垫江红属于中度耐热类型，LT50平均值为56。32℃;ZB1、泼墨紫和海黄属于不耐热类型，LT50平均值为53。32℃。
Evaluation of heat resistance of 13 tree peony varieties based on semi-lethal high temperature
In order to evaluate the heat resistance of tree peony(Paeonia suffruticosa Andr.)germplasm resources,13 representative tree peony cultivars were selected as experimental materials,and the semi-lethal high temperature(LT50)was studied by the conduc-tivity method and Logistic equation.The results showed that with the treating temperatures higher step-by-step,the cell damage rate of 13 tree peony cultivars showed a typical S curve increasing trend,and the significance test conformed to the Logistic equation.The LT50 of 13 tree peony cultivars ranged from 51.31℃to 59.73℃,among which B24 had the highest LT50 of 59.73℃,while Haihuang had the lowest LT50 of 51.31℃.Based on sequential clustering method,13 tree peony cultivars could be divided into 3 groups:B24,Taipinghong,B10,Fengdanhe and Fengdanbai belonged to the heat resistant type,with an average LT50 of 57.70℃;Xiangyu,Lian-he,Wuxingyu,Daojin and Dianjianghong belonged to the moderate heat resistant type,with an average LT50 of 56.32℃;ZB1,Po-mozi and Haihuang belonged to the heat sensitive type,with an average LT50 of 53.32℃.

tree peony(Paeonia suffruticosa Andr.)cell damage rateLogistic equationsemi-lethal high temperatureheat resis-tance

余昕、陈法志、刘忠、陈志伟、戢小梅、李秀丽

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武汉市农业科学院林业果树研究所,武汉 430075

牡丹(Paeonia suffruticosa Andr.) 细胞伤害率 Logistic方程 高温半致死温度 耐热性

湖北省自然科学基金青年基金湖北省技术创新专项重大项目(农业领域)中央引导地方科技发展专项

2019CFB3512018ABA0732022BGE228

2024

10.14088/j.cnki.issn0439-8114.2024.06.018

湖北农业科学
湖北省农业科学院　华中农业大学　长江大学　黄冈师范学院

湖北农业科学

CSTPCD
影响因子：0.442
ISSN：0439-8114
年,卷(期)：2024.63(6)
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