کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8357727 | 1542054 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An assessment of the capacity for phosphoenolpyruvate carboxykinase to contribute to C4 photosynthesis
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کلمات کلیدی
TCAC4 grassesPEPCKPEPCOAAOxaloacetateNADP-MENAD-MENAD-malic enzymeNADP-malic enzyme - آنزیم NADP-malictricarboxylic acid - اسید تری کربوکسیلیکC4 photosynthesis - فتوسنتز C4Phosphoenolpyruvate carboxylase - فسفوآنولپیروات کربوکسیلازphosphoenolpyruvate carboxykinase - فسفوآنولپیرود کربوکسیکینازmesophyll - مزوفیلBundle sheath - پوسته بسته بندی شده
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An assessment of the capacity for phosphoenolpyruvate carboxykinase to contribute to C4 photosynthesis An assessment of the capacity for phosphoenolpyruvate carboxykinase to contribute to C4 photosynthesis](/preview/png/8357727.png)
چکیده انگلیسی
Three C4 acid decarboxylases, phosphoenolpyruvate carboxykinase (PEPCK), NADP-malic enzyme (NADP-ME), and NAD-malic enzyme (NAD-ME) were recruited from C3 plants to support C4 photosynthesis. In Poaceae, there are established lineages having PEPCK type species, and some NADP-ME lineages in which PEPCK contributes to C4. Besides family Poaceae, recently PEPCK has been reported to function in C4 photosynthesis in eudicot species including Cleome gynandra (Cleomaceae), Trianthema portulacastrum and Zaleya pentandra (Aizoaceae). We evaluated PEPCK by enzyme assay and western blots in representatives of Poaceae, Aizoaceae, Cleomaceae, and Chenopodiaceae compared to that in the PEPCK type C4 grass Spartina anglica. Eragrostis nutans was identified as the first NAD-ME type C4 grass having substantial amounts of PEPCK. In the eudicots, including C. gynandra, Cleome angustifolia, T. portulacastrum, Z. pentandra, and nine C4 members of family Chenopodiaceae (which has the most C4 species and diversity in forms among eudicot families), amounts of PEPCK were generally very low (barely detectable up to 4% of that in S. anglica). Based on these results, C4 species can be classified biochemically according to the dominant decarboxylase recruited for C4 function; and, Poaceae remains the only family in which PEPCK is known to have a significant role in C4 photosynthesis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 235, June 2015, Pages 70-80
Journal: Plant Science - Volume 235, June 2015, Pages 70-80
نویسندگان
Nuria K. Koteyeva, Elena V. Voznesenskaya, Gerald E. Edwards,