کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8358248 1542064 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constitutive camalexin production and environmental stress response variation in Arabidopsis populations from the Iberian Peninsula
ترجمه فارسی عنوان
تغییرات ساختاری کمالکسین و تنش زیست محیطی در جمعیت عربیدسپس از شبه جزیره ایبرین
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
چکیده انگلیسی
Optimal defense theory predicts that induction of defensive secondary metabolites in plants will be inversely correlated with constitutive expression of those compounds. Here, we asked whether camalexin, an important defense against fungal and bacterial pathogens, support this prediction in structured natural populations of Arabidopsis thaliana from the Iberian Peninsula. In common garden experiments, we found that genotypes from the VIE population constitutively hyper-accumulated camalexin. Camalexin concentrations were not induced significantly when plants were exposed to a temperature of 10 °C for 48 h. However, they were induced when plants were exposed to 48 h of infection by the virulent bacterial pathogen, Pseudomonas syringae pv. tomato DC3000. Genotypes from the VIE population with the hyper-accumulation of camalexin were significantly more resistant to bacterial growth. Induction of camalexin was negatively correlated with constitutive camalexin concentrations following log transformation and two different corrections for autocorrelation, thus supporting the tradeoff predicted by optimal defense theory. Constitutive overexpression of camalexin was not explained by the only known natural genetic polymorphism at the Accelerated Cell Death 6, ACD6, locus. Collectively, the results support an important role of camalexin in defense against P. syringae as well as significant structured variation in defense levels within wild populations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 225, August 2014, Pages 77-85
نویسندگان
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