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Ultrasonic seed treatment improved cadmium (Cd) tolerance in Brassica napus L.

文献类型： 外文期刊

作者： Rao, Gangshun 1 ; Huang, Suihua 2 ; Ashraf, Umair 4 ; Mo, Zhaowen 2 ; Duan, Meiyang 2 ; Pan, Shenggang 2 ; Tang, Xiang 1 ;

作者机构： 1.Guangdong Ocean Univ, Fac Agr Sci, Dept Biotechnol, Zhanjiang 524088, Peoples R China

2.South China Agr Univ, Coll Agr, Dept Crop Sci & Technol, Guangzhou 510642, Guangdong, Peoples R China

3.Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Guangdong, Peoples R China

4.Univ Educ, Dept Bot, Div Sci & Technol, Lahore 54770, Punjab, Pakistan

关键词： Antioxidants; Cadmium stress; Germination rate; Rapeseed; Ultrasonic waves; Yield

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN： 0147-6513

年卷期： 2019 年 185 卷

页码：

收录情况： SCI

摘要： Cadmium (Cd) affects crop growth and productivity by disrupting normal plant metabolism. To determinate whether ultrasonic (US) seed treatment can alleviate Cd stress in rape (Brassica napus L.), the seeds of two oilseed rape cultivars i.e., 'Youyanzao18' and 'Zaoshu104' were exposed to ultrasonic waves for 1 min at 20 KHz frequency. Seeds without US treatment were taken as control (CK). Results revealed that the germination rate of both cultivars was significantly (P < 0.05) higher in US treatment than CK only at 0 and 10 mg Cd L-1. The shoot and root length of both cultivars were significantly higher in US treatment than CK at all Cd treatments except the root length of Youyanzao18 at 50 mg Cd L-1. The fresh weight Youyanzao18 was significantly (P < 0.05) higher in US than CK except for Youyanzao18 at 25 mg Cd L-1. Moreover, the superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX) activities and the proline, glutathione (GSH), and soluble protein contents in Youyanzao18 were relatively higher in the US treatment than CK. The malondialdehyde (MDA) contents were prominently reduced in US treatment than CK. The pods per plant, seeds per pod and rapeseed yield were increased by 15.9, 11.4, and 16.4% in Youyanzao18 and 10.3, 9.5, and 11.5% in Zaoshu104, respectively in US treatment, compared to CK. Moreover, the contents of Cd in root, stem, leaf, rape pod shell, and rapeseeds were comparatively less in US treatment than CK whereas the Cd concentrations in different plant parts of both rape cultivars were recorded as: leaf root stem rape pod shell rapeseed. In sum, the US treatment improved the morphological growth and rapeseed yield whereas reduced the Cd accumulation in different plant parts of rapeseed under Cd contaminated soil.

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