Evaluation of rhizobacteria in upland rice in Brazil: growth promotion and interaction of induced defense responses against leaf blast (Magnaporthe oryzae)

Blast and the initial vigor of upland rice plants are the main challenges facing rice crops in Brazilian no-tillage systems. The aim of this study was to evaluate the growth promotion and interactions of defense responses against Magnaporthe oryzae in rice plants treated with rhizobacteria Bacillus...

Full description

Saved in:
Bibliographic Details
Published in:Acta physiologiae plantarum 2017-12, Vol.39 (12), p.1-11, Article 259
Main Authors: Sperandio, Eugenio Miranda, do Vale, Helson Mario Martins, de Souza Reis, Marcello, de Carvalho Barros Cortes, Marcio Vinícius, Lanna, Anna Cristina, de Filippi, Marta Cristina Corsi
Format: Article
Language:English
Subjects:
Agriculture
Ammonia
Biomass
Biomedical and Life Sciences
Cereal crops
Disease control
Life Sciences
Lipoxygenase
Liquid oxygen
Magnaporthe oryzae
Nitrate reductase
Original Article
Oryza
Pathogenesis
Peroxidase
Phenylalanine
Plant Anatomy/Development
Plant Biochemistry
Plant Genetics and Genomics
Plant growth
Plant Pathology
Plant Physiology
Plants (botany)
Principal components analysis
Promotion
Rice
Rice blast
Salicylic acid
Seeds
Serratia
Shoots
Tillage
Vigor
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Blast and the initial vigor of upland rice plants are the main challenges facing rice crops in Brazilian no-tillage systems. The aim of this study was to evaluate the growth promotion and interactions of defense responses against Magnaporthe oryzae in rice plants treated with rhizobacteria Bacillus sp. (BRM 32110) and Serratia sp. (BRM 32114). The seeds of the rice were microbiolized, and 14 days after the plants emerged, the soil was drenched with rhizobacterial suspensions. Growth promotion was evaluated by root and shoot biomass, root and shoot length, foliar area, and nitrate reductase (NR) activity. The defense response was evaluated by quantification of the rice blast severity (RBS), disease progress, pathogenesis-related protein (PRP) activity, and salicylic acid content (SA). The length and biomass of the roots and shoots and the foliar area of the plants treated with BRM 32114 isolate increased; however, the NR activity was 43% lower compared to the control. Both isolates reduced the severity and progress of the disease. Principal component analysis showed that RBS, β-1,3-glucanase (GLU), peroxidase (POX), and phenylalanine ammonia lyase (PAL) were the main sources of the first components of variance, whereas lipoxygenase (LOX) and SA were the main sources of the second components and were negatively correlated. Serratia sp. isolate BRM 32114 can be used as a growth-promoting agent and has potential for inducing resistance in rice plants. The results suggest that the interaction among the levels and timing of the PRP activity and the levels of SA play important roles in the defense responses against M. oryzae .
ISSN:0137-5881
1861-1664
DOI:10.1007/s11738-017-2547-x