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Role of the AtClC genes in regulation of root elongation in Arabidopsis | ||
| Iranian Journal of Genetics and Plant Breeding | ||
| مقاله 1، دوره 4، شماره 1 - شماره پیاپی 7، تیر 2015، صفحه 1-8 اصل مقاله (800.82 K) | ||
| نویسندگان | ||
| Hossein Moradi* 1، 2؛ Theo Elzenga2؛ Frank Lanfermeijer2 | ||
| 1Department of Horticulture and Plant Breeding,Sari Agricultural Sciences and Natural Resources University, Iran. P. O. Box: 578. | ||
| 2Department of Plant Biology, University of Groningen, P. O. Box: 9750 AA Haren, The Netherlands. | ||
| تاریخ دریافت: 05 خرداد 1395، تاریخ پذیرش: 05 خرداد 1395 | ||
| چکیده | ||
| The protein family of anion channel (ClC) constitute a family of transmembrane trnsporters that either function as anion channel or as H+/anion exchanger. The expression of three genes of AtClCa, AtClCb and AtClCd in the model plant Arabidopsis thaliana were silenced by a T-DNA insertion . When the pH of the medium was slightly acidic the length of the primary root of plants with a disrupted AtClCa and AtClCd gene was reduced compared to the wild type and the plant with a disrupted AtClCb gene. The proton fluxes and pH were measured along the surface of the root at different positions, from root cap, through the transition zone, and up to the fast elongation zone, and at different pHs of the medium. A high proton influx was found in the apical part of the transition zone. Lower influxes or even small effluxes were found in the basal part of the elongation zone. At pH 6.2 the influx of protons in the apical part of the transition zone in the Atclca and Atclcd mutants was significantly lower than in wildtype and the Atclcb mutant. This will suggest a model for the interaction between endomembrane anion/H+ antiporters, plasma membrane proton fluxes and cell expansion in roots of Arabidopsis. | ||
| کلیدواژه‌ها | ||
| Proton؛ Root؛ Antiporter؛ Transition zone | ||
| عنوان مقاله [English] | ||
| نقش ژن های آنیون کانالها در طویل شدن ریشه آرابیدوپسیس | ||
| نویسندگان [English] | ||
| حسین مرادی1، 2؛ تئو الزنگا2؛ فرانک لانفرمیجر2 | ||
| 1گروه باغبانی و اصلاح نباتات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران. صندوق پستی 578. | گروه زیست شناسی گیاهی، دانشگاه گرونینگن، ، هارن، هلند. صندوق پستی 9750 آآ. | ||
| 2گروه باغبانی و اصلاح نباتات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران. صندوق پستی 578. | گروه زیست شناسی گیاهی، دانشگاه گرونینگن، ، هارن، هلند. صندوق پستی 9750 آآ. | ||
| چکیده [English] | ||
| پروتئین های خانواده آنیون کانالها، به عنوان خانواده ای از ترانسپورتر های غشای سلولی اند که یا نقش کانال آنیونی و یا نقش پمپ آنیونی را در گیاه ایفا می کنند. ژنهایAtClC در گیاه مدل ژنتیکی آرابیدپسیس از طریق اعمال T-DNA خاموش گردیدند. زمانیکه pH محیط کمی اسیدی گردید طول ریشه اولیه گیاهان میوتن AtClCa,و AtClCd در مقایسه با شاهد و AtClCb کاهش رشد نشان داد. جریان حرکت انتقال پروتون و pH در نواحی مختلف سلول های سطح ریشه شامل منطقه کلاهک، منطقه انتقالی و منطقه تمایز یابی اندازه گیری شد. جریان انتقال به داخل بالای پروتون در ناحیه انتهای منطقه انتقالی ریشه دیده شد. جریان کم انتقال به داخل و یا حتی جریان انتقال به خارج سلولی پروتون در قاعده منطقه طویل شدن ریشه دیده شد. همچنین در pHبرابر 2/6 جریان ورود پروتون در انتهای منطقه انتقالی در گیاهان میوتن AtClCdو AtClCa, بصورت معنی داری کمتر از شاهد و AtClCbبود. نتایج این تحقیق مدلی را جهت بررسی اثر متقابل بین آنتی پرتر /H+ آنیون ، جریان پروتونی غشای پلاسمایی و افزایش طول ریشه آرابیدپسیس را ارایه می کند. | ||
| کلیدواژه‌ها [English] | ||
| پروتون, ریشه, آنتی پرتر, ناحیه انتقال | ||
| مراجع | ||
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