Effects of three phenolic compounds on mitochondrial function and root vigor of cotton (Gossypium hirsutum L.) seedling roots
文献类型： 外文期刊
作者： Zhang, Guowei 1 ; Yang, Changqin 1 ; Liu, Ruixian 1 ; Ni, Wanchao 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Key Lab Cotton & Rape Lower Reaches Yangtze River, Minist Agr, Inst Ind Crops, Nanjing 210014, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Prov Key Lab Agrobiol, Nanjing 210014, Jiangsu, Peoples R China
关键词： Cotton; Phenolic compounds; Mitochondrial function; Root vigor; Root
期刊名称：ACTA PHYSIOLOGIAE PLANTARUM （ 影响因子：2.354； 五年影响因子：2.711 ）
ISSN： 0137-5881
年卷期： 2019 年 41 卷 5 期
页码：
收录情况： SCI
摘要： Continuous cropping of cotton causes accumulation of allelochemicals in soil that results in substantial crop yield and quality losses. To elucidate the physiological mechanism of the effects of allelochemicals on cotton root growth, and solve the problem of continuous cropping obstacles, hydroponics experiments were carried out to study the effects of three allelochemicals (p-hydroxybenzoic acid (PHBA), phloroglucinol, and ferulic acid) at different concentrations (0.8, 4.0, and 20.0mmolL(-1)) on the production of reactive oxygen species, antioxidant enzyme activities, and mitochondrial function of cotton seedling roots. All three phenolic compounds suppressed cotton root growth, decreased the activity of antioxidant enzymes (superoxide dismutase, catalase and peroxidase) and H+-ATPase in root mitochondria, and increased generation of O-2(-) and the content of H2O2. They also increased the degree of openness of mitochondria permeability transition pores, and decreased the membrane fluidity of mitochondria, and the ratio of cytochrome (Cyt) c/a, thus resulting in the damage of mitochondrial structure and overall function of the root system. Ferulic acid at 20.0mmolL(-1) inhibited cotton root growth more than the other treatments. Above all, all three kinds of allelochemicals inhibited antioxidant enzyme activity and mitochondrial function in cotton seedling roots, and the inhibition depended on the dose of phenolic compounds. Compared to PHBA and phloroglucinol, ferulic acid was a stronger inhibitor of cotton seedling root growth.
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