|Table of Contents|

Growth，Physiology and Biochemistry Responses of Pueraria lobata to Low Temperature Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2022年18
Page:
109-116
Research Field:
Publishing date:

Info

Title:
Growth，Physiology and Biochemistry Responses of Pueraria lobata to Low Temperature Stress
Author(s):
ZENG Hongxue; QU Xinghong
(Zhejiang Tongji Vocational College of Science and Technology，Hangzhou，Zhejiang 311231)
Keywords:
Pueraria lobata; low temperature stress; growth; physiological and biochemical
PACS:
-
DOI:
10.11937/bfyy.20220955
Abstract:
Taking Hunan and Australian Pueraria lobata germplasms as experimental materials，the growth，physiological and biochemical changes and low temperature tolerance of two Pueraria lobata germplasms under artificial simulated temperature gradients of 25 ℃，15 ℃ and 10 ℃ were studied and analyzed by using the method of low temperature gradient test，in order to provide reference for the utilization of Pueraria lobata.The results showed that the growth indexes (growth rate，fresh weight，dry weight，leaf area，leaf width，leaf length and leaf perimeter) of the two Pueraria lobata germplasms decreased with the decrease of temperature.Conductivity，malondialdehyde content，osmotic adjustment substance content (soluble sugar，proline)，antioxidant enzyme activity (catalyst，peroxidase，superoxide dismutase，ascorbate peroxidase) all increased with the decrease of temperature.The contents of ABA increased，while the contents of GA3，IAA and ZT decreased with the decrease of temperature.Under low temperature conditions，the growth indicators，osmotic adjustment material content，antioxidant enzyme activity and endogenous hormone content of Australian germplasm were basically higher than those of Hunan germplasm.In conclusion，the two Pueraria lobata germplasms adapt to low temperature stress by slowing down the growth rate of plants，reducing biomass，changing leaf morphological parameters，reducing the content of endogenous hormones，improving osmotic adjustment substances and increasing the activity of antioxidant enzymes.Under low temperature stress，the accumulation or maintenance of higher osmotic adjustment material content，antioxidant enzyme activity and endogenous hormone content may be the main reason why Australian germplasm has stronger cold tolerance than Hunan germplasm.

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Last Update: 2022-11-30