کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2016333 1067652 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Abscisic acid enhances resistance to Alternaria solani in tomato seedlings
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
Abscisic acid enhances resistance to Alternaria solani in tomato seedlings
چکیده انگلیسی

The plant hormone abscisic acid (ABA) is an important regulator in many aspects of plant growth and development, as well as stress resistance. Here, we investigated the effects of exogenous ABA application on the interaction between tomato (Solanum lycopersicon L.) and Alternaria solani (early blight). Foliar spraying of 7.58 μM ABA was effective in reducing disease severity in tomato plants. Previously, increased activities of phenylalanine ammonia-lyase (PAL), polyphenol oxidase (PPO) and peroxidase (POD) were observed in exogenous ABA-treated tomato leaves. Moreover, these enzyme activities were maintained at higher levels in ABA-pretreated and A. solani challenged tomato plants. Tomato defense genes, such as PR1, β-1, 3-glucanase (GLU), PPO, POD, and superoxide dismutase (SOD), were rapidly and significantly up-regulated by exogenous ABA treatment. Furthermore, a subsequent challenge of ABA-pretreated plants with the pathogen A. solani resulted in higher expression of defense genes, compared to water-treated or A. solani inoculated plants. Therefore, our results suggest that exogenous ABA could enhance disease resistance against A. solani infection in tomato through the activation of defense genes and via the enhancement of defense-related enzymatic activities.


► We first study the exact impact of ABA on tomato–Alternaria solani interaction.
► It is first report that ABA enhanced notably the resistance of tomato to A. solani.
► It is detected that ABA remarkably increased several defense enzyme activities.
► It is showed that ABA activated expression of several defense genes obviously.
► ABA enhanced these enzyme activities and gene expression, as the same as A. solani.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 49, Issue 7, July 2011, Pages 693–700
نویسندگان
, , , ,