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| Effects of Silicon on Growth and Ion Uptake of Wheat Under Combined Stresses of Excessive Boron and High Salinity |
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| KeyWord:silicon; boron toxicity; salt stress; salinity; wheat |
| Author Name | Affiliation | | MA Qing-na | Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin 300387, China
Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China | | LU Wen-kai | Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China | | ZHEN Mei-nan | Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin 300387, China | | MA Cheng-cang | Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin 300387, China | | LIU Chun-guang | Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China |
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| Abstract: |
| Silicon（Si） has showed to improve the tolerance of plants to abiotic stresses. However, it is still unclear whether Si can enhance plant tolerance to combined stresses of excessive B and high salinity. A pot experiment was conducted with wheat（Triticum aestivum Linn.）grown in combined B（300 mg·kg-1）, salinity（5 g·kg-1 NaCl）, and Si（0 mg·kg-1, 50 mg·kg-1, and 100 mg·kg-1） to investigate the growth and ion uptake of wheat. Silicon increased wheat biomass and potassium（K） uptake, but inhibited the uptake of B and sodium（Na）, thus reducing the tissue Na/K ratios. Silicon showed no significant effects on calcium（Ca） and magnesium（Mg） uptake. A greater alleviating effect of Si on combined stresses of B and salinity was observed under 100 mg Si·kg-1 than under 50 mg Si·kg-1. These results suggest that Si is able to alleviate the inhibition of wheat growth by combined stress of B and salinity via reducing B and Na accumulation and promoting K uptake. |
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