|Table of Contents|

Responses of Different Cultivars (Strains) of Hibiscus mutabilis L. to Salt Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2022年15
Page:
67-73
Research Field:
Publishing date:

Info

Title:
Responses of Different Cultivars (Strains) of Hibiscus mutabilis L. to Salt Stress
Author(s):
LI Mengxia; CAI Lu; ZENG Xinmei; ZHU Zhangshun
(Chengdu Botanical Garden (Chengdu Institute of Park City Plant Research),Chengdu,Sichuan 610083)
Keywords:
Hibiscus mutabilis L.; salt stress; cultivars (strains); reactive oxygen species; anti-oxidation
PACS:
-
DOI:
10.11937/bfyy.20220621
Abstract:
Cultivar （‘JQH’） and strains (‘DBH’‘DBB’‘MDF’‘ZY’) of Hibiscus mutabilis L. were used as experimental materials.The phenotypic changes，plant height，fresh weight，reactive oxygen species，malondialdehyde and antioxidant enzyme activities of different cultivars (strains) under the condition of adding NaCl to simulate salt stress under hydroponic conditions were studied，in order to explore different Hibiscus mutabilis L. cultivars (strains) tolerance and response to salt stress.The results showed that under the salt stress treatment，the growth of the seedlings of different cultivars (strains) of Hibiscus mutabilis L. was inhibited.Compared with the CK，the NaCl treatment reduced the plant height by 48.40%-58.56% and the fresh weight by 63.87%-76.58%，the accumulation of superoxide anion (O?2) and hydrogen peroxide (H2O2) increased significantly，the content of malondialdehyde (MDA) in the leaves increased by 1.65-10 times；the activity of antioxidant enzymes was significantly enhanced，which was 2-26 times that of CK.The tolerance of different Hibiscus mutabilis L. cultivars (strains) under salt stress treatment showed obvious differences，with ‘DBH’ having the strongest tolerance，‘JQH’/‘MDF’ second，and ‘DBB’/‘ZY’ having the worst tolerance.Under 1% NaCl treatment，the plant height，root length and fresh weight of ‘DBH’ were 1.19/1.20，1.17/1.16，1.45/1.60 times that of ‘DBB’/‘ZY’；compared with the accumulation of H2O2 and O?2 ‘DBB’/‘ZY’ was significantly reduced；MDA content was only 73.58%/69.40% of ‘DBB’/‘ZY’；superoxide dismutase (SOD)，peroxidase (POD)，catalase (CAT) was 1.45/1.71，2.07/1.99，1.99/2.12 times of ‘DBB’/‘ZY’.The results showed that Hibiscus mutabilis L. under salt stress could slow down oxidative damage and membrane damage by increasing the activity of antioxidant enzymes，thereby alleviating its growth inhibition.This research lays the foundation for the breeding of salt-tolerant cultivars (strains) of Hibiscus mutabilis L.，the exploration of salt-tolerant mechanism of Hibiscus mutabilis L. and its promotion in the northwest and northeast regions.

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Last Update: 2022-09-09