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The role of silicon in enhancing resistance to bacterial blight of hydroponic- and soil-cultured rice.

Song A, Xue G, Cui P, Fan F, Liu H, Yin C, Sun W, Liang Y - Sci Rep (2016)

Bottom Line: In both inoculated and uninoculated plants, shoot dry weight was significantly higher in the +Si plants than in the -Si plants.Moreover, total concentrations of soluble phenolics and lignin in rice leaves were significantly higher in the +Si plants than in the -Si plants.Addition of Si resulted in increased Pal transcription, and inhibited CatA and Os03g0126000 expression in the earlier and later stages of bacterial inoculation, respectively.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China.

ABSTRACT
Here we report for the first time that bacterial blight of rice can be alleviated by silicon (Si) added. In both inoculated and uninoculated plants, shoot dry weight was significantly higher in the +Si plants than in the -Si plants. A soil-cultured trial showed that disease severity was 24.3% lower in the Si-amended plants than in the non-Si-amended plants. Plants that were switched from -Si to +Si nutrient solution and simultaneously inoculated with Xoo also exhibited the same high resistance to bacterial blight as the plants that were treated continuously with Si, with control efficiencies of 52.8 and 62.9%, respectively. Moreover, total concentrations of soluble phenolics and lignin in rice leaves were significantly higher in the +Si plants than in the -Si plants. Polyphenoloxidase (PPO) and phenylalanine ammonia-lyase (PAL) activities in rice leaves were observed to be higher in the +Si plants than in the -Si plants. The expression levels of Os03g0109600, Prla, Rcht2 and Lox2osPil, were also higher in +Si plants than in -Si plants post-inoculation during the experimental time. Addition of Si resulted in increased Pal transcription, and inhibited CatA and Os03g0126000 expression in the earlier and later stages of bacterial inoculation, respectively.

No MeSH data available.


Related in: MedlinePlus

Dry weight of shoots and roots of rice seedlings non-inoculated (−P) or inoculated with Xoo (+P) under different silicon treatments in hydroponic (A) and soil-cultured (B) experiments. Bars are mean value of three replicates. Vertical lines represent standard deviations.
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f1: Dry weight of shoots and roots of rice seedlings non-inoculated (−P) or inoculated with Xoo (+P) under different silicon treatments in hydroponic (A) and soil-cultured (B) experiments. Bars are mean value of three replicates. Vertical lines represent standard deviations.

Mentions: In both the hydroponic and the soil-cultured experiments, both root and shoot dry weights were significantly lower in the +P (Xoo inoculated) plants than in the −P plants (without inoculation) (Fig. 1A,B). Regardless of inoculation, shoot dry weight was significantly higher in the +Si (Si-amended) plants than in the −Si (non-Si-amended) plants.


The role of silicon in enhancing resistance to bacterial blight of hydroponic- and soil-cultured rice.

Song A, Xue G, Cui P, Fan F, Liu H, Yin C, Sun W, Liang Y - Sci Rep (2016)

Dry weight of shoots and roots of rice seedlings non-inoculated (−P) or inoculated with Xoo (+P) under different silicon treatments in hydroponic (A) and soil-cultured (B) experiments. Bars are mean value of three replicates. Vertical lines represent standard deviations.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835757&req=5

f1: Dry weight of shoots and roots of rice seedlings non-inoculated (−P) or inoculated with Xoo (+P) under different silicon treatments in hydroponic (A) and soil-cultured (B) experiments. Bars are mean value of three replicates. Vertical lines represent standard deviations.
Mentions: In both the hydroponic and the soil-cultured experiments, both root and shoot dry weights were significantly lower in the +P (Xoo inoculated) plants than in the −P plants (without inoculation) (Fig. 1A,B). Regardless of inoculation, shoot dry weight was significantly higher in the +Si (Si-amended) plants than in the −Si (non-Si-amended) plants.

Bottom Line: In both inoculated and uninoculated plants, shoot dry weight was significantly higher in the +Si plants than in the -Si plants.Moreover, total concentrations of soluble phenolics and lignin in rice leaves were significantly higher in the +Si plants than in the -Si plants.Addition of Si resulted in increased Pal transcription, and inhibited CatA and Os03g0126000 expression in the earlier and later stages of bacterial inoculation, respectively.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China.

ABSTRACT
Here we report for the first time that bacterial blight of rice can be alleviated by silicon (Si) added. In both inoculated and uninoculated plants, shoot dry weight was significantly higher in the +Si plants than in the -Si plants. A soil-cultured trial showed that disease severity was 24.3% lower in the Si-amended plants than in the non-Si-amended plants. Plants that were switched from -Si to +Si nutrient solution and simultaneously inoculated with Xoo also exhibited the same high resistance to bacterial blight as the plants that were treated continuously with Si, with control efficiencies of 52.8 and 62.9%, respectively. Moreover, total concentrations of soluble phenolics and lignin in rice leaves were significantly higher in the +Si plants than in the -Si plants. Polyphenoloxidase (PPO) and phenylalanine ammonia-lyase (PAL) activities in rice leaves were observed to be higher in the +Si plants than in the -Si plants. The expression levels of Os03g0109600, Prla, Rcht2 and Lox2osPil, were also higher in +Si plants than in -Si plants post-inoculation during the experimental time. Addition of Si resulted in increased Pal transcription, and inhibited CatA and Os03g0126000 expression in the earlier and later stages of bacterial inoculation, respectively.

No MeSH data available.


Related in: MedlinePlus