|Table of Contents|

Effects of Low-temperature Domestication on the Cold Resistance of Erigeron breviscapus Seedlings

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2025年5
Page:
82-89
Research Field:
Publishing date:

Info

Title:
Effects of Low-temperature Domestication on the Cold Resistance of Erigeron breviscapus Seedlings
Author(s):
ZHANG Xuan1; XU Ping1; YU Mengwen1; ZHANG Xiaoye1; ZHU Li2; ZHENG Guowei1
(1.School of Traditional Chinese Medicine，Yunnan University of Traditional Chinese Medicine/Yunnan Key Laboratory of Sustainable Utilization of Southern Medicines，Kunming,Yunnan 650500；2.Agricultural Comprehensive Service Center，People′s Government of Puladi Township，Nujiang，Yunnan 673501)
Keywords:
Erigeron breviscapus; low-temperature domestication; physiology and biochemistry; cold resistance
PACS:
R 931
DOI:
10.11937/bfyy.20243071
Abstract:
Taking Erigeron breviscapus seedlings as experimental materials,they were divided into control group (without low-temperature acclimation) and cold acclimation group (acclimated at 5 ℃ for 72 hours).The two groups were treated with freezing treatment (-5 ℃ for 3 hours),melting treatment (4 ℃ for 24 hours),recovery for 1 day (room temperature for 24 hours) and recovery for 2 days (room temperature for 48 hours),respectively.The positive effects of low temperature on cold resistance of Erigeron breviscapus were studied,in order to provide reference for improving the cold resistance of Erigeron breviscapus.The results showed that,1) the chlorophyll b and total chlorophyll contents of Erigeron breviscapus were reduced after cold domestication；2) the relative conductivity was significantly increased by 38.57%，but the relative conductivities of the treatment groups were reduced by 52.33%,71.31%,43.90%,and 28.40% in the freezing，thawing，recovery 1 day and recovery 2 days stages，respectively；3) after low-temperature domestication,the soluble protein content of Erigeron breviscapus seedling increased by 38.53%,while soluble sugar content decreased by 37.14%,and there was no significant change in proline content;4) glutathione reductase,catalase,and ascorbate peroxidase activities decreased by 56.89%,91.02%,and 78.11%，respectively，after cold domestication.In conclusion，low-temperature domestication was able to enhance the physiological regulation ability of Erigeron breviscapus，reduce the degree of damage to its cell membrane，and thus enhance its resistance to low-temperature stress.

References:

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Last Update: 2025-03-14