کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4425685 1309111 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Responses to ozone pollution of alfalfa exposed to increasing salinity levels
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Responses to ozone pollution of alfalfa exposed to increasing salinity levels
چکیده انگلیسی

Stomatal closure and biosynthesis of antioxidant molecules are two fundamental components of the physiological machinery that lead to stress adaptation during plant's exposure to salinity. Since high stomatal resistance may also contribute in counteracting O3 damages, we hypothesized that soil salinization may increase O3 tolerance of crops. An experiment was performed with alfalfa grown in filtered (AOT40 = 0 in both years) and non-filtered (AOT40 = 9.7 in 2005 and 6.9 ppm h in 2006) open-top chambers. Alfalfa yield was reduced by O3 (−33%) only in plants irrigated with salt-free water, while the increasing levels of soil salinity until 1.06 dS m−1 reduced both stomatal conductance and plant O3 uptake, thus linearly reducing O3 effects on yield. Therefore a reliable flux-based model for assessing the effects of O3 on crop yield should take into account soil salinity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 157, Issue 5, May 2009, Pages 1445–1452
نویسندگان
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