Paranoid potato Phytophthora-resistant genotype shows constitutively activated defense

被引：31

作者：

Ali, Ashfaq ^{[1
]}

Moushib, Laith Ibrahim ^{[1
]}

Lenman, Marit ^{[2
]}

Levander, Fredrik ^{[3
]}

Olsson, Kerstin ^{[4
]}

Carlson-Nilson, Ulrika ^{[4
]}

Zoteyeva, Nadezhda ^{[5
]}

Liljeroth, Erland ^{[2
]}

Andreasson, Erik ^{[2
]}

机构：

[1] Lund Univ, Dept Biol, Lund, Sweden

[2] Swedish Univ Agr Sci, Dept Plant Protect Biol, Alnarp, Sweden

[3] Lund Univ, Dept Immunotechnol, Lund, Sweden

[4] Swedish Univ Agr Sci, Dept Plant Breeding & Biotechnol, Alnarp, Sweden

[5] NI Vavilov Inst Plant Ind, Dept Genet, St Petersburg, Russia

来源：

PLANT SIGNALING & BEHAVIOR | 2012年 / 7卷 / 03期

关键词：

Phytophthora infestans; potato; constitutive defence; resistance; hypersensitive response; PR proteins; cpr; late blight; plant-pathogen interaction; cell death;

D O I：

10.4161/psb.19149

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 [生物化学与分子生物学]; 081704 [应用化学];

摘要：

Phytophthora is the most devastating pathogen of dicot plants. There is a need for resistance sources with different modes of action to counteract the fast evolution of this pathogen. In order to better understand mechanisms of defense against P. infestans, we analyzed several clones of potato. Two of the genotypes tested, Sarpo Mira and SW93-1015, exhibited strong resistance against P. infestans in field trials, whole plant assays and detached leaf assays. The resistant genotypes developed different sizes of hypersensitive response (HR)-related lesions. HR lesions in SW93-1015 were restricted to very small areas, whereas those in Sarpo Mira were similar to those in Solanum demissum, the main source of classical resistance genes. SW93-1015 can be characterized as a cpr (constitutive expressor of PR genes) genotype without spontaneous microscopic or macroscopic HR lesions. This is indicated by constitutive hydrogen peroxide (H2O2) production and PR1 (pathogenesis-related protein 1) secretion. SW93-1015 is one of the first plants identified as having classical protein-based induced defense expressed constitutively without any obvious metabolic costs or spontaneous cell death lesions.

引用

页码：400 / 408

页数：9

共 49 条

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