Effect of root and leaf applications of soluble silicon on blast development in rice

Bragantia

Isaias Severino Cacique²  Gisele Pereira Domiciano²  Wiler Ribas Moreira²  Fabrício Ávila Rodrigues²  Maria Fernanda Antunes Cruz²  Núria Sierras Serra¹  Ana Botta Catal๠

[1] ,Viçosa Federal University Department of Plant Pathology Laboratory of Host-Parasite InteractionViçosa MG ,Brazil

关键词: Pyricularia oryzae;    foliar disease;    mineral nutrition;    Pyricularia oryzae;    doença foliar;    nutrição mineral;   

DOI  :  10.1590/brag.2013.032

来源: SciELO

【 摘 要 】

Blast, caused by Pyricularia oryzae, is the most important fungal disease of rice worldwide. This study aimed to compare root and foliar supply of soluble silicon (Si) on rice resistance to blast. The application of soluble Si to the roots increased Si concentration in leaf tissues as compare to plants grown in soil amended with calcium silicate. There was no increase in leaf Si concentration after soluble Si spray, regardless if the leaves were washed or not before analysis. X-ray microanalysis revealed that Si deposition was very similar on the leaf epidermis of plants sprayed with soluble Si, root amended with soluble Si or grown in soil amended with calcium silicate. The lesion size, the number of lesions per cm² of leaf and the area under blast progress curve were reduced for rice plants grown in soil that received the application of soluble Si or was amended with calcium silicate. The results of this study showed that the supply of soluble Si to the roots or its spray onto to the rice leaves can decrease blast symptoms.

【 授权许可】

CC BY   
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