Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (29): 86-95.doi: 10.11924/j.issn.1000-6850.casb2021-0920

Special Issue: 生物技术 园艺

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Chlorophyll Fluorescence Characteristics of Lilium spp. Cultivars Under Natural High Temperature

CHEN Minmin(), NIE Gongping, LI Xin, ZHOU Lin, YANG Liuyan, ZHANG Yongchun()   

  1. Forestry and Pomology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai 201403
  • Received:2021-09-26 Revised:2021-11-03 Online:2022-10-15 Published:2022-10-14
  • Contact: ZHANG Yongchun E-mail:cmm0707@163.com;saasflower@163.com

Abstract:

A study on the response of chlorophyll fluorescence parameters of different Lilium spp. cultivars to natural high temperature was carried out to analyze the important indicators reflecting the characteristics of chlorophyll fluorescence, establish a suitable method for evaluating the high temperature response of Lilium spp. cultivars, and select sensitive and insensitive cultivars to natural high temperature. 66 Lilium spp. cultivars were selected as experimental materials, and the Fv/Fm values of functional leaves were measured under natural high temperature in Shanghai. The fuzzy membership function analysis method and the sample optimal segmentation clustering method were adopted to evaluate the heat tolerance. Under natural high temperature conditions, the chlorophyll fluorescence characteristic parameters including Fo, Fm, Fv/Fo, Fv/Fm, PIABS, DIo/CSo and φEo in leaves were determined by rapid fluorescence detector. Then, we compared the sensitivity of different Lilium spp. cultivars. Results showed that the Fv/Fm values of the 66 cultivars were all influenced by natural high temperature. The sample optimal segmentation clustering method was used to classify the 66 cultivars into five grades. 25 cultivars, including ‘Souvenir’, ‘Merlet’, ‘Conca D'Or’, ‘Sunny Martinique’, ‘Methone’ and so on, belonged to grade I, which were not sensitive to high temperature and had strong adaptability. 19 cultivars, including ‘Zambesi’, ‘Triumphator’, ‘Nashville’, ‘Brindisi’, ‘Tresor’, etc., belonged to grade V, which were more sensitive to high temperature and had poor adaptability. This study screened and identified sensitive and insensitive Lilium spp. cultivars to high temperature, which could provide reference for further research on heat-resistant mechanism of Lilium spp. and breeding heat-resistant cultivars.

Key words: Lilium spp., chlorophyll fluorescence parameters, natural high temperature response, membership function method

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