Abstract
This experiment studied the effects of four different soil pH values (3.4, 4.4, 5.5, 6.6) on the growth and enzyme protection system of Sedum aizoon L. by simulating soil acidification. Results showed that: Sedum aizoon L. grew best in the control soil. With the decrease of soil pH, plant height and aboveground fresh were gradually inhibited, but mild stress (pH 5.5) could promote the growth of root length and increase the aboveground fresh, while moderate and severe stress could inhibit its increase. When the soil pH was in the range of 4.6 - 6.6, the activities of SOD,CAT, APX, GR, soluble sugar, soluble protein, proline and mad in the plant increased significantly, but the relative electrical conductivity of the root system was not significantly different from that of the control. After the soil pH was lower than 4.6, except APX activity continued to increase, SOD, CAT, GR activity and soluble sugar, soluble protein, proline content decreased significantly, and root relative conductivity and MDA content increased significantly, which indicated that severe soil acid stress would reduce root protective enzyme activity, cause osmotic adjustment imbalance, and lead to slow or even stop plant growth.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: IOP Conference Series: Earth and Environmental Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.