Inducers of resistance and silicon on the activity of defense enzymes in the soybean-Phakopsora pachyrhizi interaction

Bragantia

Maria Fernanda Antunes Da Cruz²  Fabrício Ávila Rodrigues¹  Leonora Rodriguez Polanco¹  Carmen Rosa Da Silva Curvêlo¹  Kelly Juliane Telles Nascimento¹  Maurílio Alves Moreira¹  Everaldo Gonçalves Barros² 

[1] ,Universidade Federal de Viçosa Departamento de Biologia Viçosa MG ,Brasil

关键词: Glycine max;    Asian soybean rust;    induction of resistance;    mechanisms of host defense;    Glycine max;    ferrugem asiática;    indução de resistência;    mecanismos de defesa do hospedeiro;   

DOI  :  10.1590/S0006-87052013005000025

来源: SciELO

【 摘 要 】

This study aimed to determine the effect of jasmonic acid (JA), Acibenzolar-S-Methyl (ASM) and calcium silicate (a source of soluble silicon, Si), on the potentiation of soybean resistance to Asian soybean rust (ASR). The ASR severity was significantly reduced on plants sprayed with ASM or supplied with Si in comparison to plants sprayed with JA or deionized water. For chitinases (CHI), significant differences in activity between non-inoculated and inoculated plants sprayed with deionized water or with ASM occurred at 72 hours after inoculation (hai), at 24 and 72 hai when sprayed with JA and at 141 hai when supplied with Si. For β-1,3-glucanases (GLU), significant differences in activity between non-inoculated and inoculated plants sprayed with deionized water occurred at 24, 48 and 141 hai, but not until 72 for plants sprayed with ASM. For phenylalanine ammonia-lyases (PAL), significant differences in activity between non-inoculated and inoculated plants occurred only for plants sprayed with ASM at 72 and 141 hai. In conclusion, the ASR symptoms can be mild on plants sprayed with ASM or supplied with Si and that this amelioration likely involved the defense enzymes.

【 授权许可】

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