کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9456349 | 1309191 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Canopy profiles of photosynthetic parameters under elevated CO2 and N fertilization in a poplar plantation
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کلمات کلیدی
F/UVcmaxRuBPA600SLAPPFDPopulusChlFree Air CO2 EnrichmentE/A - E / Aribulose-1,5-bisphosphate - ribulose-1،5-bisphosphateElevated CO2 - افزایش CO2Jmax - جماکسChlorophyll - سبزینه یا کلروفیلSpecific leaf area - سطح برگ مخصوصFace - صورتPhotosynthesis - فتوسنتزphotosynthetic photon flux density - فتوسنتز تراکم شار فوتونNitrogen - نیتروژنISF - نیروهای امنیتی عراقStomatal conductance - هدایت گرمایشی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A poplar plantation has been exposed to an elevated CO2 concentration for 5 years using the free air CO2 enrichment (FACE) technique. Even after such a long period of exposure, leaves of Populus x euramericana have not shown clear signs of photosynthetic acclimation. Only at the end of the growing season for shade leaves was a decrease of maximum velocity of carboxylation (Vcmax) observed. Maximum electron transport rate (Jmax) was increased by FACE treatment in July. Assimilation rates at CO2 partial pressure of 400 (A400) and 600 (A600) μmol molâ1 were not significantly different under FACE treatment. Most notably FACE significantly decreased stomatal conductance (gs) both on upper and lower canopy leaves. N fertilization increased N content in the leaves on mass basis (Nm) and specific leaf area (SLA) in both CO2 treatments but did not influence the photosynthetic parameters. These data show that in poplar plantations the long-term effects of elevated CO2 on photosynthesis do not differ considerably from the short-term ones even with N deposition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 137, Issue 3, October 2005, Pages 525-535
Journal: Environmental Pollution - Volume 137, Issue 3, October 2005, Pages 525-535
نویسندگان
Carlo Calfapietra, Ingmar Tulva, Eve Eensalu, Marta Perez, Paolo De Angelis, Giuseppe Scarascia-Mugnozza, Olevi Kull,