کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5905729 | 1159926 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Plant degreening: evolution and expression of tomato (Solanum lycopersicum) dephytylation enzymes
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کلمات کلیدی
RCCred chlorophyll cataboliteprimary fluorescent chlorophyll catabolitepFCCMurashige and Skoog mediaChlideCLHPheophorbide a oxygenasePheophytinPheoPheophorbideSAG12LTRABAChlPAOSGRPPHLikelihood ratio test - آزمون نسبت احتمالabscisic acid - اسید آبسزیکPhotosynthetically active radiation - تابش فعال فتوسنتزیPar - توسطstandard error - خطای استانداردRipening - رطوبتChlorophyll - سبزینه یا کلروفیلUntranslated regions - مناطق غیر ترجمهUTR یا untranslated regions - منطقه ترجمه نشدهSenescence - پیریChlorophyllide - کلروفیلChlorophyllase - کلروفیل اسیدTomato - گوجه فرنگی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
ژنتیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Plant degreening: evolution and expression of tomato (Solanum lycopersicum) dephytylation enzymes Plant degreening: evolution and expression of tomato (Solanum lycopersicum) dephytylation enzymes](/preview/png/5905729.png)
چکیده انگلیسی
Chlorophyll is the most abundant pigment on earth and even though it is known that its high photo-excitability necessitates a tight regulation of its degradation pathway, to date there are still several steps in chlorophyll breakdown that remain obscure. In order to better understand the 'degreening' processes that accompany leaf senescence and fruit ripening, we characterized the enzyme-encoding genes involved in dephytylation from tomato (Solanum lycopersicum). A single pheophytinase (PPH) gene and four chlorophyllase (CLH) genes were identified in the tomato genome. A phenetic analysis revealed two groups of CLHs in eudicot species and further evolutionary analysis indicated that these enzymes are under diverse selection pressures. A comprehensive expression profile analysis also suggested functional specificity for these dephytylating enzymes. The integrated analysis allows us to propose three general roles for chlorophyll dephytylation: i) PPH, which is under high selective constraint, is responsible for chlorophyll degradation during developmentally programed physiological processes; ii) Group I CLHs, which are under relaxed selection constraint, respond to environmental and hormonal stimuli and play a role in plant adaptation plasticity; and iii) Group II CLHs, which are also under high selective constraint, are mostly involved in chlorophyll recycling.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gene - Volume 546, Issue 2, 10 August 2014, Pages 359-366
Journal: Gene - Volume 546, Issue 2, 10 August 2014, Pages 359-366
نویسندگان
Bruno Silvestre Lira, Nathalia de Setta, Daniele Rosado, Juliana Almeida, Luciano Freschi, Magdalena Rossi,