|Table of Contents|

Effects of Salt Stress on Physiological Characteristics of Begonia semperflorens Link et Otto Seedlings

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年16
Page:
62-69
Research Field:
Publishing date:

Info

Title:
Effects of Salt Stress on Physiological Characteristics of Begonia semperflorens Link et Otto Seedlings
Author(s):
JIANG Yuntian1LI Yumei2CHEN Chenxia1WANG Hao1
(1.College of Life Science,Tonghua Normal University,Tonghua,Jilin 134002;2.Institute of Ecological Environment,Jilin Normal University,Siping,Jilin 136000)
Keywords:
Begonia semperflorens Link et OttoNaCl stressantioxidant enzymeosmotic adjustmentsalt tolerance threshold
PACS:
-
DOI:
10.11937/bfyy.20193604
Abstract:
In order to investigate the physiological adaptation of Begonia semperflorens Link et Otto seedlings to NaCl stress,and determine its tolerance threshold,the effects of NaCl stress with different concentrations on the growth and physiological indexes were studied with one-year-old potted seedlings of Begonia semperflorens.The results showed that with the increasing of NaCl concentration,the relative conductivity of leaves increased gradually,plant height growth decreased,and fresh weight and dry weight of whole-plant decreased.The seedling growth was obviously inhibited.With the increasing of NaCl concentration,the content of MDA increased and activity of SOD decreased.The content of soluble protein decreased and free proline increased,and there were a significant negative correlation between them.The activity of POD and the content of soluble sugar increased first and then decreased.In the whole process of osmotic regulation,free proline and soluble sugar played an important role of osmotic adjustment.The salt tolerance threshold of Begonia semperflorens seedlings was 242.67 mmol?L-1,when taking 50% drop in whole-plant dry weight as standard.

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Last Update: 2020-11-23