کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8288581 | 1536258 | 2018 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Leaf-age dependent response of carotenoid accumulation to elevated CO2 in Arabidopsis
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کلمات کلیدی
GFWRPMDASppmGDWDevelopmental phasestandard error of means - خطای استاندارد معنیElevated carbon dioxide - دی اکسید کربن بالاhours - ساعت هاChlorophyll - سبزینه یا کلروفیلrevolutions per minute - سرعت در هر دقیقهLeaf age - سن برگPhotosynthesis - فتوسنتزparts per million - قطعات در میلیونSEM - مدل معادلات ساختاری / میکروسکوپ الکترونی روبشیCarotenoid - کاروتنوئیدhigh performance liquid chromatography - کروماتوگرافی مایع با کارایی بالاHPLC - کروماتوگرافی مایعی کارا
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Carotenoids contribute to photosynthesis, photoprotection, phytohormone and apocarotenoid biosynthesis in plants. Carotenoid-derived metabolites control plant growth, development and signalling processes and their accumulation can depend upon changes in the environment. Elevated carbon dioxide (eCO2) often enhances carbon assimilation, early growth patterns and overall plant biomass, and may increase carotenoid accumulation due to higher levels of precursors from isoprenoid biosynthesis. Variable effects of eCO2 on carotenoid accumulation in leaves have been observed for different plant species. Here, we determined whether the variable response of carotenoids to eCO2 was potentially a function of leaf age and the impact of eCO2 on leaf development by growing Arabidopsis in ambient CO2 (400â¯ppm) and eCO2 (800â¯ppm). eCO2 increased plant leaf number, rosette area, biomass, seed yield and net photosynthesis. In addition, eCO2 increased carotenoid content by 10-20% in younger emerging leaves, but not in older mature leaves. Older leaves contained approximately 60% less total carotenoids compared to younger leaves. The age-dependent effect on carotenoid content was observed for cotyledon, juvenile and adult phase leaves. We conclude that younger leaves utilize additional carbon from enhanced photosynthesis in eCO2 to increase carotenoid content, yet older leaves have less capacity to store additional carbon into carotenoids.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Archives of Biochemistry and Biophysics - Volume 647, 1 June 2018, Pages 67-75
Journal: Archives of Biochemistry and Biophysics - Volume 647, 1 June 2018, Pages 67-75
نویسندگان
Namraj Dhami, David T. Tissue, Christopher I. Cazzonelli,