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Bulletin of Botanical Research ›› 2021, Vol. 41 ›› Issue (4): 596-603.doi: 10.7525/j.issn.1673-5102.2021.04.015

• Research report • Previous Articles    

Effects of NaCl Stress on Morphological and Physiological Characteristics of Magnolia denudata Desr.

He-Xian JIN1, Xu-Yue SHEN1, Rong-Rong CHEN1, Zhen WU1, Ya-Mei SHEN1, Dong-Mei ZHANG2()   

  1. 1.Zhejiang A&F University,Lin’an 311300
    2.Shanghai Academy of Landscape Architecture Science and Planning,Shanghai 200232
  • Received:2020-09-05 Online:2021-07-20 Published:2021-03-24
  • Contact: Dong-Mei ZHANG E-mail:418517920@qq.com
  • About author:JIN He-Xian(1964—),female,postdoctoral researcher,mainly engages in history and theory of landscape architecture,plant landscape design.
  • Supported by:
    Key Research and Development Projects of Shanghai Science and Technology Commission(20dz1203700);Study on the Evaluation Method of Species Adaptability of Challenging Urban Site Greening(H20180177);Key R&D Projects in Zhejiang Province(2019C02023);Breeding of New Tree Varieties in the 13th Five Year Plan of Zhejiang Province(2016C02056-12)

Abstract:

In order to explore the adaptability of Magnolia denudata Desr. to salt stress, nutrient solution was used to simulate salt stress, and the growth traits, the physiological and biochemical response characteristics were determined and analyzed under different stress levels respectively. During the whole stress process, the symptom level of salt damage was reached up to grade 2, the leaves appeared yellow and scorched. With the stress time longer, the relative electric conductivity and contents of MDA and proline in leaves increased respectively. The contents of chlorophyll b, soluble sugar, soluble protein, SOD and POD activity increased first and then decreased. The contents of chlorophyll and chlorophyll a increased first and then decreased under 100 and 200 mmol·L-1 of NaCl stress respectively, but decreased under 300 mmol·L-1 of NaCl stress. M. denudata had certain ability of salt tolerance, and it could be used in mild saline soil.

Key words: NaCl stress, Magnolia denudata, physiology characteristics, salt tolerance

CLC Number: