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اثر تنش شوری بر برخی خصوصیات فیزیولوژیک درختچه خرزهره (Nerium oleander) | ||
| دانش آب و خاک | ||
| مقاله 4، دوره 27، شماره 3، پاییز 1396، صفحه 41-51 اصل مقاله (1729 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
فاطمه زارع زاده1؛ علی اکبر کریمیان  2؛ حمید سودایی زاده3
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| 1دانش-آموخته کارشناسی ارشد محیط زیست، دانشگاه یزد | ||
| 2استادیار گروه مرتع و آبخیزداری، دانشگاه یزد | ||
| 3دانشیار گروه مدیریت مناطق بیابانی، دانشگاه یزد | ||
| چکیده | ||
| شوری یک مسئله فراگیر و محدود-کننده توسعه فضای سبز شهری در مناطق خشک است. به-دلیل کمبود آب با کیفیت مناسب در این مناطق، استفاده از آبهای با کیفیت پایینتر جهت آبیاری گیاهان مورد توجه قرار گرفته و معرفی گونههای متحمل به شوری جهت استفاده در فضای سبز شهری امری ضروری است. این پژوهش در شرایط گلخانه جهت بررسی اثر پنج سطح شوری آب آبیاری شامل 4/0، 3، 6، 9 و 12 دسیزیمنس بر متر در قالب طرح بلوکهای کامل تصادفی با سه تکرار بر روی برخی شاخصهای فیزیولوژیکی گیاه خرزهره (Nerium oleander) به اجرا در آمد. نتایج نشان داد که شوری منجر به افزایش معنادار غلظت سدیم و کاهش میزان پتاسیم ریشه در تمامی سطوح شوری در مقایسه با تیمارشاهد شد. میزان سدیم برگ خرزهره تنها در سطح شوری 12 دسیزیمنس بر متر در مقایسه با تیمار شاهد معنادار بود. غلظت پتاسیم در اندام هوایی خرزهره تحت تأثیر شوری قرار نگرفت. همچنین با افزایش شوری مقدار پرولین برگ ها افزایش یافت، ولی در مقدار قندهای محلول و کلروفیل تغییر معناداری بین تیمارهای مختلف مشاهده نشد. به نظر میرسد خرزهره با تجمع پرولین، جذب و نگهداری یونهای سدیم و کلرید در ریشه و عدم انتقال آنها به برگ، تنش شوری را تحمل نموده است. | ||
| کلیدواژه‌ها | ||
| تنش شوری؛ خرزهره(Nerium oleander)؛ خصوصیات فیزیولو‍یک؛ فضای سبز | ||
| عنوان مقاله [English] | ||
| Effect of Salt Stress on Some Physiological Attributes of Nerium oleander | ||
| نویسندگان [English] | ||
| F Zare Zadeh1؛ AA Karimian2؛ H Soudaie Zadeh3 | ||
| 1-M.Sc. Graduate of Environmental Sciences, Yazd University, Iran | ||
| 2Assist. Prof. Dept. Natural Resources, Yazd University, Iran | ||
| 3Assoc. Prof. Dept. Natural Resources, Yazd University, Iran | ||
| چکیده [English] | ||
| Salinity is a widespread problem and a limiting factor on the development of urban landscape in arid regions. Due to lack of good quality water in these areas, there is a noticeable to use of low quality water for irrigation of plants. In this regard, introduction of salt tolerant species for using in urban landscape is necessary. In order to investigate the effects of five levels of irrigation water salinity, including: 0.4, 3, 6, 9 and 12 dS/m-1 on some physiological attributes of Nerium oleander under greenhouse condition, an experimental was conducted based on randomized complete block design with three replicates. The results showed that the all salinity levels caused significant increase of sodium concentration and reduction of potassium in root in comparison with the control treatment. The amount of sodium in leaves of Nerium oleander only at the 12 dSm-1 concentration level had a significant difference with control. On the other hand the potassium concentration in Nerium oleander leaves was not affected by the salinity. Also the leaf Proline concentration was increased with increasing salinity, but there was no significant difference in the amounts of soluble sugars and chlorophyll between different treatments. So, it seems Nerium oleander by the Proline aggregation and also absorption and holding the sodium and chlorine in the roots and preventing their translocation to the leaves, can tolerate salt stress. | ||
| کلیدواژه‌ها [English] | ||
| Landscape, Nerium oleander, Physiological attributes, Salt stress | ||
| مراجع | ||
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