Calcium polypeptide mitigates Cd toxicity in rice via reducing oxidative stress and regulating pectin modification.

Autor: Chen H; State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Science, Hubei University, Wuhan, China.; Faculty of Resources and Environmental Science, Hubei University, Wuhan, China., Tang X; Civil & Environmental Engineering, University of California, Irvine, CA, US., Wang T; State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Science, Hubei University, Wuhan, China.; Collaborative Innovation of Water Security for the Water Source Region of Mid-Line of the South-to-North Diversion Project of Henan Province, College of Agricultural Engineering, Nanyang Normal University, Nanyang, China., Liao W; School of Biological and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, China., Wu Z; Bijie Institute of Agricultural Science, Bijie, China., Wu M; Bijie Institute of Agricultural Science, Bijie, China., Song Z; Bijie Institute of Agricultural Science, Bijie, China., Li Y; State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Science, Hubei University, Wuhan, China., Luo P; State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Science, Hubei University, Wuhan, China. luopan@hubu.edu.cn.
Jazyk: angličtina
Zdroj: Plant cell reports [Plant Cell Rep] 2024 Jun 06; Vol. 43 (7), pp. 163. Date of Electronic Publication: 2024 Jun 06.
DOI: 10.1007/s00299-024-03253-4
Abstrakt: Key Message: Calcium polypeptide plays a key role during cadmium stress responses in rice, which is involved in increasing peroxidase activity, modulating pectin methylesterase activity, and regulating cell wall by reducing malondialdehyde content. Cadmium (Cd) contamination threatens agriculture and human health globally, emphasizing the need for sustainable methods to reduce cadmium toxicity in crops. Calcium polypeptide (CaP) is a highly water-soluble small molecular peptide acknowledged for its potential as an organic fertilizer in promoting plant growth. However, it is still unknown whether CaP has effects on mitigating Cd toxicity. Here, we investigated the effect of CaP application on the ability to tolerate toxic Cd in rice. We evaluated the impact of CaP on rice seedlings under varying Cd stress conditions and investigated the effect mechanism of CaP mitigating Cd toxicity by Fourier transform infrared spectroscopy (FTIR), fluorescent probe dye, immunofluorescent labeling, and biochemical analysis. We found a notable alleviation of Cd toxicity by reduced malondialdehyde content and increased peroxidase activity. In addition, our findings reveal that CaP induces structural alterations in the root cell wall by modulating pectin methylesterase activity. Altogether, our results confirm that CaP not only promoted biomass accumulation but also reduced Cd concentration in rice. This study contributes valuable insights to sustainable strategies for addressing Cd contamination in agricultural ecosystems.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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