کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8352907 | 1541893 | 2018 | 51 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Superoxide (O2.-) accumulation contributes to symptomless (type I) nonhost resistance of plants to biotrophic pathogens
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کلمات کلیدی
BGTO2.-Blumeria graminis f. sp. hordeiPTIBGHBlumeria graminis f. sp. triticiHAIPCDDAIPAMPNBTCATROS - ROSHydrogen peroxide - آب اکسیژنهAntioxidants - آنتی اکسیدانETI - اتیpathogen-associated molecular pattern - الگوی مولکولی وابسته به پاتوژنNADPH oxidase - اکسیداز NADPH PAMP-triggered immunity - ایمنی PAMPEffector-triggered immunity - ایمنی عامل اثرNitro blue tetrazolium chloride - تترازولیم کلرید نیترو آبیdays after inoculation - روز بعد از تلقیحhours after inoculation - ساعت ها بعد از تلقیحSOD - سدSuperoxide - سوپر اکسیدSuperoxide dismutase - سوکسوکس دیسموتازHeat shock - شوک حرارتیbax inhibitor-1 - مهارکننده bax-1H2O2 - هیدروژن پراکسیدHypersensitive response - پاسخ حساسیتCatalase - کاتالازReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Nonhost resistance is the most common form of disease resistance exhibited by plants against most pathogenic microorganisms. Type I nonhost resistance is symptomless (i.e. no macroscopically visible cell/tissue death), implying an early halt of pathogen growth. The timing/speed of defences is much more rapid during type I nonhost resistance than during type II nonhost and host (“gene-for-gene”) resistance associated with a hypersensitive response (localized necrosis, HR). However, the mechanism(s) underlying symptomless (type I) nonhost resistance is not entirely understood. Here we assessed accumulation dynamics of the reactive oxygen species superoxide (O2.-) during interactions of plants with a range of biotrophic and hemibiotrophic pathogens resulting in susceptibility, symptomless nonhost resistance or host resistance with HR. Our results show that the timing of macroscopically detectable superoxide accumulation (1-4 days after inoculation, DAI) is always associated with the speed of the defense response (symptomless nonhost resistance vs. host resistance with HR) in inoculated leaves. The relatively early (1 DAI) superoxide accumulation during symptomless nonhost resistance of barley to wheat powdery mildew (Blumeria graminis f. sp. tritici) is localized to mesophyll chloroplasts of inoculated leaves and coupled to enhanced NADPH oxidase (EC 1.6.3.1) activity and transient increases in expression of genes regulating superoxide levels and cell death (superoxide dismutase, HvSOD1 and BAX inhibitor-1, HvBI-1). Importantly, the partial suppression of symptomless nonhost resistance of barley to wheat powdery mildew by heat shock (49â¯Â°C, 45â¯s) and antioxidant (SOD and catalase) treatments points to a functional role of superoxide in symptomless (type I) nonhost resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 128, July 2018, Pages 115-125
Journal: Plant Physiology and Biochemistry - Volume 128, July 2018, Pages 115-125
نویسندگان
András Künstler, Renáta Bacsó, Réka Albert, Balázs Barna, Zoltán Király, Yaser Mohamed Hafez, József Fodor, Ildikó Schwarczinger, Lóránt Király,