کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10840146 | 1067575 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hemoglobin expression affects ethylene production in maize cell cultures
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کلمات کلیدی
ACCACSACOACC oxidase - ACC اکسیدازACC synthase - ACC سنتازMAPK - MAPKROS - ROSEthylene - اتیلنZea mays - ذرت sodium nitroprusside - نیتروپروساید سدیمHemoglobin - هموگلوبینmitogen-activated protein kinase - پروتئین کیناز فعال با mitogenSNP - چندریختی تک-نوکلئوتیدReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The formation of ethylene under different O2 concentrations and upon addition of nitric oxide (NO) donor, sodium nitroprusside (SNP), was determined using maize (Zea mays L.) cell lines over-expressing (Hb+) or down-regulating (Hb-) hypoxically inducible (class-1) hemoglobin (Hb). Under all treatments, ethylene levels in the Hb- line were 5 to 6.5 times the levels in Hb+ and four to five times the levels in the wild type. Low oxygen partial pressures impaired ethylene formation in maize cell suspension cultures. 1-Amino-cyclopropane-1-carboxylic acid (ACC) oxidase (E.C. 1.14.17.4) mRNA levels did not vary, either between lines or between treatments. There was, however, significantly enhanced ACC oxidase (ACO) activity in the Hb- line relative to the wild type and the Hb+ line. ACO activity in the Hb- line increased under hypoxic conditions and significantly increased upon treatment with NO under normoxic conditions. The results suggest that limiting class-1 hemoglobin protein synthesis increases ethylene formation in maize suspension cells, possibly via the modulation of NO levels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 43, Issue 5, May 2005, Pages 485-489
Journal: Plant Physiology and Biochemistry - Volume 43, Issue 5, May 2005, Pages 485-489
نویسندگان
Nathalie Manac'h-Little, Abir U. Igamberdiev, Robert D. Hill,