Effects of Salicylic Acid on Growth and Physiology of Non-heading Chinese Cabbage Seedlings under Cadmium Stress

CHEN Hua; CHEN Yongkuai; WANG Tao; HUANG Yuyan; LIAO Shuilan; LAN Jie; KANG Yuxin

doi:10.19303/j.issn.1008-0384.2020.12.005

Volume 35 Issue 12

Dec. 2020

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Article Navigation > Fujian Journal of Agricultural Sciences > 2020 > 35(12): 1321-1329

CHEN H, CHEN Y K, WANG T, et al. Effects of Salicylic Acid on Growth and Physiology of Non-heading Chinese Cabbage Seedlings under Cadmium Stress [J]. Fujian Journal of Agricultural Sciences，2020，35（12）：1321−1329 doi: 10.19303/j.issn.1008-0384.2020.12.005

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CHEN H, CHEN Y K, WANG T, et al. Effects of Salicylic Acid on Growth and Physiology of Non-heading Chinese Cabbage Seedlings under Cadmium Stress [J]. Fujian Journal of Agricultural Sciences，2020，35（12）：1321−1329 doi: 10.19303/j.issn.1008-0384.2020.12.005

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Effects of Salicylic Acid on Growth and Physiology of Non-heading Chinese Cabbage Seedlings under Cadmium Stress

doi: 10.19303/j.issn.1008-0384.2020.12.005

1.
Fujian Academy of Agricultural Sciences, Fuzhou 350003, Fujian China
2.
Institute of Digital Agriculture, Fujian Academy of Agricultural Sciences, Fuzhou　350003, Fujian China

Received Date: 2020-09-10
Rev Recd Date: 2020-11-01
Publish Date: 2020-12-31

Abstract

Abstract

Objective Growth and physiological responses of non-heading Chinese cabbage to salicylic acid (SA) spraying under Cd-stress were studied. Method Huaguan non-heading Chinese cabbage (Brassica chinensis L.) seedlings under an imposed stress of 50 mg CdCl·2.5H₂O·L⁻¹ were sprayed with SA at a rate of 0.01-0.5 mmol·L⁻¹. Growth, root activity, osmotic regulators, photosynthetic pigment content, malondialdehyde (MDA) content, and antioxidant enzyme activity as well as the Cd absorption, accumulation, and transportation of the separately treated seedlings were determined. Result The seedlings under the Cd-stress control (CK₂) grew significantly slower with reduced root vitality, contents of photosynthetic pigments, protein, and proline (Pro), and antioxidant enzyme activities but increased MDA in comparison to the blank control (CK₁). Under the Cd-stress, SA spraying in the range of 0.01-0.05 mmol·L⁻¹ rejuvenated the seedling growth, with the greatest effect observed when 0.05 mmol·L⁻¹ SA was applied. The seedlings of CK₁ had their root/shoot ratio increased by 140%, proline content by 44.98%, POD by 118.18%, and CAT by 70.43% over those of CK₂ 10d under the Cd-stress, while the aboveground parts of the plants had the Cd content and transport coefficient significantly reduced. On the other hand, when higher SA concentrations in the range of 0.1-0.5 mmol·L⁻¹ was applied, the seedling growth was significantly inhibited. Conclusion At a concentration of 0.05 mmol SA·L⁻¹, the spraying could effectively alleviate the Cd toxicity and improve the Cd tolerance of the non-heading Chinese cabbage seedlings.
- Brassica chinensis L.,
- salicylic acid,
- cadmium stress,
- antioxidant enzyme activity,
- Cd accumulation

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