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

doi:10.7525/j.issn.1673-5102.2021.04.015

Abstract

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:

S685.15

He-Xian JIN, Xu-Yue SHEN, Rong-Rong CHEN, Zhen WU, Ya-Mei SHEN, Dong-Mei ZHANG. Effects of NaCl Stress on Morphological and Physiological Characteristics of Magnolia denudata Desr.[J]. Bulletin of Botanical Research, 2021, 41(4): 596-603.

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