کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8354060 | 1541915 | 2016 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Developmental changes in carbon and nitrogen metabolism affect tea quality in different leaf position
ترجمه فارسی عنوان
تغییرات رشد در متابولیسم کربن و نیتروژن بر کیفیت چای در موقعیت برگ مختلف تاثیر می گذارد
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
چکیده انگلیسی
Leaf position represents a specific developmental stage that influences both photosynthesis and respiration. However, the precise relationships between photosynthesis and respiration in different leaf position that affect tea quality are largely unknown. Here, we show that the effective quantum yield of photosystem II [ΦPSâ
¡] as well as total chlorophyll concentration (TChl) of tea leaves increased gradually with leaf maturity. Moreover, respiration rate (RR) together with total nitrogen concentration (TN) decreased persistently, but total carbon remained unchanged during leaf maturation. Analyses of major N-based organic compounds revealed that decrease in TN was attributed to a significant decrease in the concentration of caffeine and amino acids (AA) in mature leaves. Furthermore, soluble sugar (SS) decreased, but starch concentration increased with leaf maturity, indicating that source-sink relationship was altered during tea leaf development. Detailed correlation analysis showed that ΦPSâ
¡ was negatively correlated with RR, SS, starch, tea polyphenol (TP), total catechins and TN, but positively correlated with TChl; while RR was positively correlated with TN, SS, TP and caffeine, but negatively correlated with TChl and starch concentrations. Our results suggest that biosynthesis of chlorophyll, catechins and polyphenols is closely associated with photosynthesis and respiration in different leaf position that greatly influences the relationship between primary and secondary metabolism in tea plants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 106, September 2016, Pages 327-335
Journal: Plant Physiology and Biochemistry - Volume 106, September 2016, Pages 327-335
نویسندگان
Zhi-Xin Li, Wei-Jun Yang, Golam Jalal Ahammed, Chen Shen, Peng Yan, Xin Li, Wen-Yan Han,