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Selenium promotes sulfur accumulation and plant growth in wheat ( Triticum aestivum )
Author(s) -
Boldrin Paulo F.,
de Figueiredo Marislaine A.,
Yang Yong,
Luo Hongmei,
Giri Shree,
Hart Jonathan J.,
Faquin Valdemar,
Guilherme Luiz R.G.,
Thannhauser Theorodore W.,
Li Li
Publication year - 2016
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/ppl.12465
Subject(s) - selenate , biofortification , selenium , shoot , apx , micronutrient , chemistry , plant physiology , nutrient , antioxidant , biology , biochemistry , botany , organic chemistry , superoxide dismutase
Selenium (Se) is an essential micronutrient for animals and humans and a target for biofortification in crops. Sulfur (S) is a crucial nutrient for plant growth. To gain better understanding of Se and S nutrition and interaction in plants, the effects of Se dosages and forms on plant growth as well as on S level in seven wheat lines were examined. Low dosages of both selenate and selenite supplements were found to enhance wheat shoot biomass and show no inhibitory effect on grain production. The stimulation on plant growth was correlated with increased APX antioxidant enzyme activity. Se forms were found to exert different effects on S metabolism in wheat plants. Selenate treatment promoted S accumulation, which was not observed with selenite supplement. An over threefold increase of S levels following selenate treatment at low dosages was observed in shoots of all wheat lines. Analysis of the sulfate transporter gene expression revealed an increased transcription of SULTR1 ;1, SULTR1 ;3 and SULTR4 ;1 in roots following 10 μ M Na 2 SeO 4 treatment. Mass spectrometry‐based targeted protein quantification confirmed the gene expression results and showed enhanced protein levels. The results suggest that Se treatment mimics S deficiency to activate specific sulfate transporter expression to stimulate S uptake, resulting in the selenate‐induced S accumulation. This study supports that plant growth and nutrition benefit from low dosages of Se fertilization and provides information on the basis underlying Se‐induced S accumulation in plants.