期刊论文详细信息
PeerJ
Role of reactive oxygen species and isoflavonoids in soybean resistance to the attack of the southern green stink bug
article
Ivana Sabljic1  Jesica A. Barneto1  Karina B. Balestrasse1  Jorge A. Zavala1  Eduardo A. Pagano1 
[1] Instituto de Investigaciones en Biociencias Agrícolas y Ambientales-INBA, Facultad de Agronomía, Universidad de Buenos Aires;GDM
关键词: Plant–insect interaction;    Glycine max;    Nezara viridula;    Oxidative stress;    Herbivory;    Lipoxygenase;   
DOI  :  10.7717/peerj.9956
学科分类:社会科学、人文和艺术(综合)
来源: Inra
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【 摘 要 】

Southern green stink bugs (Nezara viridula L.) are one of the major pests in many soybean producing areas. They cause a decrease in yield and affect seed quality by reducing viability and vigor. Alterations have been reported in the oxidative response and in the secondary metabolites in different plant species due to insect damage. However, there is little information available on soybean-stink bug interactions. In this study we compare the response of undamaged and damaged seeds by Nezara viridula in two soybean cultivars, IAC-100 (resistant) and Davis (susceptible), grown under greenhouse conditions. Pod hardness, H2O2 generation, enzyme activities in guaiacol peroxidase (GPOX), catalase (CAT) and superoxide dismutase (SOD) as well as lipoxygenase expression and isoflavonoid production were quantified. Our results showed a greater resistance of IAC-100 to pod penetration, a decrease in peroxide content after stink bug attack, and higher GPOX, CAT and SOD activities in seeds due to the genotype and to the genotype-interaction with the herbivory treatment. Induction of LOX expression in both cultivars and higher production of isoflavonoids in IAC-100 were also detected. It was then concluded that the herbivory stink bug induces pathways related to oxidative stress and to the secondary metabolites in developing seeds of soybean and that differences between cultivars hold promise for a plant breeding program.

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