NDLI: Silicon reduces long-term cadmium toxicities in potted garlic plants

Content Provider	Springer Nature Link
Author	Wang, Yichao Hu, Yanhong Duan, Yaoke Feng, Ru Gong, Haijun
Copyright Year	2016
Abstract	A long-term experiment was conducted to investigate the alleviative effects of silicon (Si) on cadmium (Cd) toxicity in garlic plants grown in pots. Cd and Si were introduced into soil before sowing. Cd was added at a rate of 20 mg kg$^{−1}$ soil, and Si was applied at two rates: 50 mg SiO$_{2}$ kg$^{−1}$ (Si1) and 500 mg SiO$_{2}$ kg$^{−1}$ (Si2). There were totally six treatments consisting of CT (control, no added Cd or Si), Si1, Si2, Cd, Cd + Si1, and Cd + Si2. The results showed that Si addition did not affect the growth of garlic plants under control conditions. Under Cd stress, the plant growth and PSII quantum efficiency were inhibited, and they were significantly improved in the presence of added Si. Added Si at Si1 level did not change the soil pH and Cd availability, while it increased Cd accumulation in both shoot and bulb, and improved Cd tolerance. Si added at Si2 level increased the soil pH and decreased Cd availability, and decreased Cd accumulation in different parts of the plant. Added Si had no effect on the activities of soil catalase, urease or invertase regardless of Cd presence. The results suggest that Si could increase Cd tolerance of garlic plants, and the tolerance increase was attributed to not only decreased Cd availability but also in planta detoxification mechanism. There is no evidence indicating that Si-mediated increase of Cd tolerance is related to improved soil microorganism environment as observed in biotic stress conditions.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	38
Issue Number	8
e-ISSN	18611664
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-08-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cd Garlic Silicon Cd availability Cd tolerance Soil enzyme activity Plant Physiology Plant Genetics & Genomics Plant Biochemistry Plant Pathology Plant Anatomy/Development Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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