The impacts of exogenous phosphorus on Cd absorption in perennial ryegrass root cell Kinetic and mechanism study

The impacts of exogenous phosphorus on Cd absorption in perennial ryegrass root cell : Kinetic and mechanism study

Copyright © 2023 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 206(2024) vom: 01. Jan., Seite 108220
1. Verfasser: Jia, Hui (VerfasserIn)
Weitere Verfasser: Lei, Yuze, Pan, Shizhen, Zhu, Jin, Shen, Zhengtao, Tang, Lingyi, Hou, Deyi
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Cadmium contamination Phosphorous Plant root growth Polysaccharide Root cell wall Cadmium 00BH33GNGH Pectins 89NA02M4RX Soil Pollutants
Beschreibung
Zusammenfassung:Copyright © 2023 Elsevier Masson SAS. All rights reserved.
Phosphorus (P) is critical to plants in metal-contaminated soils because it participates in various biochemical reactions during plant growth. However, the mechanisms of P in mitigating the toxicity of heavy metals to ryegrass root is still veiled. In this study, the physiological and biochemical dynamics of the ryegrass root under various cadmium (Cd) and P conditions were investigated in a hydroponic system. Cd stress decreased the length of the ryegrass root, but P application enhanced the root elongation to reduce the Cd concentration in the root. Both Cd and P dosages were positively correlated with hemicellulose 1 content, pectin content, and PME activity, while having a negative effect on cellulose content. Moreover, the addition of 80 mg L-1 P increased the contents of pectin and hemicellulose 1 by 2.5 and 5.8% even with 4 mg L-1 Cd. In addition, P supply increased pectin methylesterbase activity under Cd stress, which further changed the extra-cytoplasmic structures and cell wall composition. Thus, exogenous P promoted the immobilization of Cd onto the cell wall and protected protoplast primarily through indirectly regulating the binding capacity of the root cell wall for Cd
Beschreibung:Date Completed 14.02.2024
Date Revised 14.02.2024
published: Print-Electronic
Citation Status MEDLINE
ISSN:1873-2690
DOI:10.1016/j.plaphy.2023.108220