|Table of Contents|

Comparsion on Chlorophyll Fluorescence Characteristics on the Cold-resistant Pear Varieties in Autumn

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2022年19
Page:
41-46
Research Field:
Publishing date:

Info

Title:
Comparsion on Chlorophyll Fluorescence Characteristics on the Cold-resistant Pear Varieties in Autumn
Author(s):
YAN Xingkai; LU Mingyan; WU Chunhao; ZHAO Ying; ZHANG Maojun; WANG Qiang
(Pomology Research Institute，Jilin Academy of Agricultural Sciences/Scientific Observing and Experimental Station of Pomology (Jilin,Northeast Region)，Ministry of Agriculture and Rural Affairs，Gongzhuling,Jilin 136100)
Keywords:
cold-resistant pear; chlorophyll fluorescence; diurnal variation; low temperature stress
PACS:
-
DOI:
10.11937/bfyy.20221242
Abstract:
Five varieties of ‘Shanli’‘Pingxiangli’‘Hanhongli’‘Hansuli’and ‘Shanli’(Pyrus ussuriensis) were used as test materials，the field freezing injury investigation method and chlorophyll fluorescence test method were used.The effect of diurnal variation of leaf chlorophyll fluorescence parameters in autumn on cold-resistance of pear varieties in winter was studied,in order to provide reference for rapid identification of cold resistance of pear varieties and high-quality cultivation of pear in cold regions of northern China.The results showed that light energy conversion efficiency of cold-resistant pear varieties in autumn was in the order of ‘Shanli’>‘Nanguoli’>‘Hanhongli’>‘Pingxiangli’>‘Hansuli’ from strong to weak.The differences among Fo,Fv,Fv/Fm and Fv/Fo varieties were extremely significant.Fo,Fv,Fv/Fm and Fv/Fo varied greatly among varieties,Fo values showed an inverted ‘V’ shape，Fv value of different varieties fluctuated slightly in different time periods and showed an overall upward trend,Fv/Fo value was almost consistent with that of Fv/Fm.At absolute low temperature of -31 ℃,the order of cold resistance of cultivars was ‘Hanhongli’>‘Hansuli’>‘Pingxiangli’>‘Nanguoli’>‘Shanli’,the cold tolerance was negatively correlated with diurnal Fo and positively correlated with diurnal Fv/Fm.

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Last Update: 2022-12-06