|Table of Contents|

Effects of Exogenous Glycine Betaine on Seed Germination and Seedling Growth of Alfalfa Under Drought Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2022年15
Page:
46-50
Research Field:
Publishing date:

Info

Title:
Effects of Exogenous Glycine Betaine on Seed Germination and Seedling Growth of Alfalfa Under Drought Stress
Author(s):
WANG Yongji; HAO Xiaoling; ZHOU Jiajia; GUAN Zheng; ZHANG Fenguo
(College of Life Science,Shanxi Normal University,Taiyuan,Shanxi 030000)
Keywords:
glycine betaine; drought stress; Medicago sativa; seed germination; seedling growth
PACS:
-
DOI:
10.11937/bfyy.20215015
Abstract:
Medicago sativa was used as the test material，and 20% concentration of polyethylene glycol (PEG 6000) was selected to simulate drought stress.The seed germination and seedling growth experiments were carried out at the concentrations of 0，10，20，30，40 mmol?L-1 and 50 mmol?L-1.GB was applied by root injection and leaf application at seedling stage.The related indexes of germination stage and seedling stage were studied，and then the effects of GB on the growth of alfalfa under drought stress were analyzed，in order to study the alleviating effect of exogenous betaine on drought stress，and provide reference for further improving the stress resistance and yield of alfalfa.The results showed that，1) when glycine betaine concentration was 0 mmol?L-1 and distilled water replaced betaine，all indexes of seed germination decreased，and GB was effectively relieved.When betaine concentration was 10 mmol?L-1，the effect was the best，and the germination rate increased by 30.5% compared with C0；germination potential increased by 46.8%；the germination index increased by 36.1%；the vitality index increased by 15.4%.2) At the seedling stage，when 20 mmol?L-1 was applied to the leaves，the main root length was the longest and the increment of plant height was the largest；CAT activity was the highest when 50 mmol?L-1 was injected into the root；MDA content decreased significantly when 20 mmol?L-1 was applied to leaves.50 mmol?L-1 had the greatest effect on tissue water content and POD activity.

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Last Update: 2022-09-09