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Article

Silicon Enhances Resistance to Red Crown Rot Caused by Calonectria ilicicola in Soybean

Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8602, Japan
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Academic Editor: Yuba Kandel
Agronomy 2021, 11(5), 899; https://doi.org/10.3390/agronomy11050899
Received: 20 April 2021 / Revised: 1 May 2021 / Accepted: 1 May 2021 / Published: 3 May 2021
(This article belongs to the Special Issue Molecular Biology of Disease Resistance in Rice and Soybean)
Silicon (Si) application is known to enhance plant resistance to diverse pathogens. Therefore, a greenhouse study was conducted to determine whether Si reduces red crown rot (RCR) of soybean caused by the soil-borne fungal pathogen Calonectria ilicicola. The soybean cultivar Enrei was grown in soil mixed with different concentrations of sodium silicate (Na2SiO3) and inoculated with C. ilicicola (1% w/v). Si application significantly reduced RCR severity and relative fungal growth in the roots, as per qPCR, at both sampling time points. Notably, the shoot Si content correlated significantly with RCR severity in the roots. In addition, Si application reduced the accumulation of malondialdehyde, indicating that the maintenance of cellular membrane integrity is an important mechanism underlying Si-mediated protection of soybean plants from RCR. Furthermore, Si-treated plants exhibited improved water and nitrogen uptake and root and shoot growth. Aboveground biomass and seed yield at harvest increased with increasing Si concentration (0.0–3.0 g Na2SiO3 kg−1 soil). However, further increase in Si concentration (6.0 g Na2SiO3 kg−1 soil) reduced seed yield. Therefore, Si treatment can be used as an effective strategy to control RCR in soybean. View Full-Text
Keywords: soybean; red crown rot; Calonectria ilicicola; silicon; disease resistance soybean; red crown rot; Calonectria ilicicola; silicon; disease resistance
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MDPI and ACS Style

Win, K.T.; Maeda, S.; Kobayashi, M.; Jiang, C.-J. Silicon Enhances Resistance to Red Crown Rot Caused by Calonectria ilicicola in Soybean. Agronomy 2021, 11, 899. https://doi.org/10.3390/agronomy11050899

AMA Style

Win KT, Maeda S, Kobayashi M, Jiang C-J. Silicon Enhances Resistance to Red Crown Rot Caused by Calonectria ilicicola in Soybean. Agronomy. 2021; 11(5):899. https://doi.org/10.3390/agronomy11050899

Chicago/Turabian Style

Win, Khin T., Satoru Maeda, Michie Kobayashi, and Chang-Jie Jiang. 2021. "Silicon Enhances Resistance to Red Crown Rot Caused by Calonectria ilicicola in Soybean" Agronomy 11, no. 5: 899. https://doi.org/10.3390/agronomy11050899

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