کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4372888 1617135 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cellular markers indicative of ozone stress on bioindicator plants growing in a tropical environment
ترجمه فارسی عنوان
مارکرهای سلولی نشان دهنده استرس ازن بر روی گیاهان شاخص زیستی در حال رشد در محیط گرمسیری
کلمات کلیدی
شتاب پیری سلول؛ تابش؛ پراکسید هیدروژن. پاسخ دارای حساسیت فوق العاده؛ موسسه نجوم، ژئوفیزیک و علوم جوی؛ ازن؛ انفجار اکسیداتیو؛ مرگ سلولی برنامه ریزی شده. نسبت
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی


• The effects of ozone can be detected through a group of cellular makers.
• Structural changes caused by oxidative stress occur prior to the visible symptoms.
• Specific cellular markers of ozone might indicate distinct physiological processes.
• Ozone stress prompts accelerated cell senescence and HR-like reactions.

Ozone (O3) is an oxidative pollutant that causes visible foliar symptoms in sensitive plants. Importantly, cellular markers induced by physiological alterations, including oxidative burst (OB), hypersensitive response-like (HR-like) reactions, and accelerated cell senescence (ACS), precede these symptoms. Because little is known about the effects of ozone in tropical environments, we aimed to identify these cellular markers in Nicotiana tabacum, Ipomoea nil and Psidium guajava growing in an urban area of tropical Sao Paulo, Brazil, and describe the specific physiological alterations that trigger the development of visible symptoms. Cell wall wart-like protrusions, an OB cellular marker, and swelling of thylakoids and mitochondrial membranes, as well as accumulation of plastoglobuli, all markers of ACS, were cell markers common to all species studied. Cellular markers indicating HR-like reaction, as observed in the asymptomatic leaves of N. tabacum and I. nil, are precursors of future development of necrotic areas, featuring the visible symptoms. On the other hand, the main cause of visible symptoms in P. guajava appeared to be the accumulation of phenolic compounds in the mesophyll tissue, an ACS marker. Based on this line of evidence, these bioindicator plants growing in a tropical environment show the damaging effects of O3 pollution, even before visible symptoms develop. Moreover, this damage can be detected through a distinct group of cellular markers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Indicators - Volume 67, August 2016, Pages 417–424
نویسندگان
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