Effect of Exogenous Chitosan on Physiological Properties，Antioxidant Activity，and Cadmium Uptake of Wheat（Triticum aestivum L.）Seedlings Under Cadmium Stress

被引：0

作者：

Zhang J.-J. ^{[1
]}

Jiao Q.-J. ^{[1
]}

Xu Z.-Y. ^{[1
]}

Fan L.-N. ^{[1
]}

Jiang Y. ^{[1
]}

Song J. ^{[1
]}

Hua D.-L. ^{[1
]}

Li G.-Z. ^{[2
]}

Lin D. ^{[3
]}

Liu H.-T. ^{[1
]}

机构：

[1] College of Resources and Environment, Henan Agricultural University, Zhengzhou

[2] National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou

[3] College of Forestry, Henan Agricultural University, Zhengzhou

来源：

Huanjing Kexue/Environmental Science | 2024年 / 45卷 / 06期

关键词：

antioxidant system; cadmium（Cd）stress; chitosan（CTS）; physiological characteristics; winter wheat;

D O I：

10.13227/j.hjkx.202307207

中图分类号：

学科分类号：

摘要：

This research aimed to clarify the effects of exogenously applied chitosan on the physiological characteristics，antioxidant activities，and Cd accumulation of wheat （Triticum aestivum L.）seedlings under cadmium（Cd）stress and to identify the key indicators based on the partial least squares model. The wheat variety studied was Bainong207 （BN207），and Cd-stress was achieved by growing seedlings in a hydroponic culture experiment with 10 and 25 μmol·L−1 Cd2+ added to the culture solution. It was found that both Cd-stress at 10 and 25 μmol·L−1 significantly inhibited the chlorophyll content，photosynthesis，and biomass accumulation of wheat seedlings. Seedling roots became shorter and thicker，and the lateral roots decreased under Cd-stress. The Cd-stress also increased H2O2and MDA accumulation and the degree of cell membrane lipid peroxidation and affected the activities of antioxidant enzymes such as superoxide dismutase（SOD）and peroxidase（POD）. Under Cd stress，exogenous chitosan decreased the Cd content in the aboveground and underground parts of wheat by 13.22%-21.63% and 7.92%-28.32% and reduced Cd accumulation in the aboveground and underground parts by 5.37%-6.71% and 1.91%-4.09%，respectively. Whereas exogenous chitosan application significantly reduced the content of H2O2in roots and aboveground parts of wheat by 38.21%-47.46% and 45.81%-55.73% and MDA content by 37.65%-48.12% and 29.87%-32.51%，it increased the activities of SOD and POD in roots by 2.78%-5.61% and 13.81%-18.33%，respectively. In summary，exogenous chitosan can improve the photosynthetic characteristics and antioxidant enzyme activities of wheat seedlings under Cd stress，reduce the content and accumulation of Cd in the root and aboveground parts of wheat，and alleviate the damage of lipid peroxidation to the cell membrane. All of these results provide the basal data for the application of exogenous chitosan to alleviate Cd toxicity to wheat seedlings. © 2024 Science Press. All rights reserved.

引用

页码：3649 / 3660

页数：11

共 59 条

[1] Zhang J J，, Zhu S G，, Zhu L N，, Et al., Effects of different amendments on fractions and uptake by winter wheat in slightly alkaline soil contaminated by cadmium and nickel ［J］, Environmental Science, 41, 1, pp. 460-468, (2020)
[2] Qu J H, Yuan Y H, Zhang X M，, Et al., Stabilization of lead and cadmium in soil by sulfur-iron functionalized biochar：performance，mechanisms and microbial community evolution［J］, Journal of Hazardous Materials, (2022)
[3] Rai P K, Lee S S，, Zhang M，, Et al., Heavy metals in food crops：health risks，fate，mechanisms，and management ［J］, Environment International, 125, pp. 365-385, (2019)
[4] Wang Y，, Cai H，, Lu R Y，, Et al., Effects of chitosan on Triticum aestivum growth and physiology under cadmium stress［J］, Chinese Journal of Ecology, 26, 10, pp. 1671-1673, (2007)
[5] Jiang Y，, Wei C，, Jiao Q J，, Et al., Effects of exogenous silicon application on physiological parameters， root architecture and diameter distribution of maize under cadmium stress［J］, Acta Prataculturae Sinica, 31, 9, pp. 139-154, (2022)
[6] Wang Z B, Liu H E, Xu J Y，, Et al., Effects of selenium application on cadmium uptake，antioxidant activity，and ultrastructure of winter wheat seedlings under cadmium stress［J］, Journal of Plant Nutrition and Fertilizers, 29, 3, pp. 530-543, (2023)
[7] Liu H T, Jiao Q J，, Fan L N，, Et al., Integrated physio-biochemical and transcriptomic analysis revealed mechanism underlying of Si-mediated alleviation to cadmium toxicity in wheat［J］, Journal of Hazardous Materials, (2023)
[8] Qin S Y，, Liu H E，, Nie Z J，, Et al., AsA-GSH cycle and antioxidant enzymes play important roles in Cd tolerance of wheat［J］, Bulletin of Environmental Contamination and Toxicology, 101, 5, pp. 684-690, (2018)
[9] Abbas T，, Rizwan M，, Ali S，, Et al., Effect of biochar on alleviation of cadmium toxicity in wheat （Triticum aestivum L.） grown on Cd-contaminated saline soil［J］, Environmental Science and Pollution Research, 25, 26, pp. 25668-25680, (2018)
[10] Xiong M X, Wu D, Xu X N，, Et al., Advances in toxic effects of soil heavy metal cadmium on higher plants［J］, Asian Journal of Ecotoxicology, 16, 6, pp. 133-149, (2021)

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