کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8354142 | 1541920 | 2016 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Relationship between potassium fertilization and nitrogen metabolism in the leaf subtending the cotton (Gossypium hirsutum L.) boll during the boll development stage
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کلمات کلیدی
DPAGPTGOGATGOT - بدست آوردdays after anthesis - روز بعد از آنتی ژنNitrogen metabolism - متابولیسم نیتروژنnitrate reductase - نیترات ردوکتازCotton (Gossypium hirsutum L.) - پنبه (Gossypium hirsutum L.)Potassium fertilizer - کود پتاسیمglutamate synthase - گلوتامات سنتازGlutamine synthetase - گلوتامین سنتتازglutamic-pyruvic transaminase - گلوتامین-پریوویک ترانس آمیناز
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The nitrogen (N) metabolism of the leaf subtending the cotton boll (LSCB) was studied with two cotton (Gossypium hirsutum L.) cultivars (Simian 3, low-K tolerant; Siza 3, low-K sensitive) under three levels of potassium (K) fertilization (K0: 0 g K2O plantâ1, K1: 4.5 K2O plantâ1 and K2: 9.0 g K2O plantâ1). The results showed that total dry matter increased by 13.1-27.4% and 11.2-18.5% under K supply for Simian 3 and Siza 3. Boll biomass and boll weight also increased significantly in K1 and K2 treatments. Leaf K content, leaf N content and nitrate (NO3â) content increased with increasing K rates, and leaf N content or NO3â content had a significant positive correlation with leaf K content. Free amino acid content increased in the K0 treatment for both cultivars, due to increased protein degradation caused by higher protease and peptidase activities, resulting in lower protein content in the K0 treatment. The critical leaf K content for free amino acid and soluble protein content were 14 mg gâ1 and 15 mg gâ1 in Simian 3, and 17 mg gâ1 and 18 mg gâ1 in Siza 3, respectively. Nitrate reductase (NR), glutamic-oxaloace transaminase (GOT) and glutamic-pyruvic transaminase (GPT) activities increased in the K1 and K2 treatments for both cultivars, while glutamine synthetase (GS) and glutamate synthase (GOGAT) activities increased under K supply treatments only for Siza 3, and were not affected in Simian 3, indicating that this was the primary difference in nitrogen-metabolizing enzymes activities for the two cultivars with different sensitivity to low-K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 101, April 2016, Pages 113-123
Journal: Plant Physiology and Biochemistry - Volume 101, April 2016, Pages 113-123
نویسندگان
Wei Hu, Wenqing Zhao, Jiashuo Yang, Derrick M. Oosterhuis, Dimitra A. Loka, Zhiguo Zhou,