Effects of Salinity on Some Physiological Characteristics of Lepidium sativum L.

Document Type : Research Paper

Authors

1 Department of Agronomy, Azarbaijan Shahid Madani University, Tabriz, Iran

2 1Department of Agronomy, Azarbaijan Shahid Madani University, Tabriz, Iran

3 Department of Biotechnology, Faculty of Agriculture, Azarbaijan Shahid Madani University

Abstract


Salinity is one of the major environmental stresses, which has deleterious effect on growth, development and yield of crops. Due to the gradual increase in soil and water salinity in the East Azarbaijan province of Iran, the garden cress cultivation in this region has always been associated with many problems. In order to evaluate the tolerance of this plant to different levels of salinity through some physiological characteristics, the present experiment was conducted using randomized complete block design with five treatments consisting of 0, 50, 100, 150 and 200 mM NaCl concentrations and three replications. The results showed that with enhancement in salinity levels, sodium, proline, soluble sugars and carotenoids content increased but potassium content, potassium to sodium ratio and amounts of chlorophyll a and b declined. Salinity had no significant effect on chlorophyll a+b content, chlorophyll a/b ratio and relative water content. Plants were destroyed at 200 mM concentration after 21 days. Since potassium to sodium ratio was lower than 1 at 100 and 150 mM concentrations, continuing of salinity would has presumably led to the destruction of plants in these treatments.
 

Keywords


Article Title [فارسی]

اثرات شوری بر برخی ویژگی‌های فیزیولوژیک شاهی

Authors [فارسی]

  • علی گران پایه 1
  • کامبیز عزیزپور 1
  • لمیا وجودی مهربانی 2
  • رعنا ولی زاده کامران 3
1 گروه زراعت و گیاهان داروئی، دانشکده کشاورزی، دانشگاه شهید مدنی آذربایجان، تبریز
2 گروه زراعت و گیاهان داروئی، دانشکده کشاورزی، دانشگاه شهید مدنی آذربایجان، تبریز
3 گروه بیوتکنولوژی دانشکده کشاورزی دانشگاه شهید مدنی آذربایجان
Abstract [فارسی]

شوری یکی از مهمترین تنش­های محیطی است که اثرات مخرب بر رشد، نمو و عملکرد گیاهان زراعی می­گذارد. به دلیل افزایش تدریجی شوری خاک و آب در استان آذربایجان شرقی، کاشت شاهی در این منطقه با مشکلات عدیده­ای روبرو است. از این رو، به منظور بررسی تحمل این گیاه به سطوح مختلف شوری از طریق برخی ویژگی­های فیزیولوژیک، آزمایش حاضر بر پایه بلوک­های کامل تصادفی با پنج تیمار شامل غلظت­های صفر، 50، 100، 150 و 200 میلی مولار نمک کلرید سدیم در سه تکرار به اجرا درآمد. با تشدید تنش شوری، مقدار سدیم، پرولین، قندهای محلول و کاروتنوئیدها افزایش ولی مقدار پتاسیم، نسبت پتاسیم به سدیم و مقادیر کلروفیلa و کلروفیلb کاهش یافت. شوری بر مقدار کلروفیل a+b، نسبت کلروفیلa به b و محتوای نسبی آب برگ تاثیر نداشت. طی 21 روز آزمایش، بوته­ها در غلظت 200 میلی مولار نمک از بین رفتند. به دلیل کاهش نسبت پتاسیم به سدیم به کمتر از یک در غلظت­های 100 و 150 میلی مولار نمک، ادامه مدت تنش شوری می­توانست منجر به از بین رفتن بوته­ها نیز در این تیمارها شود.
 

Keywords [فارسی]

  • شاهی
  • شوری
  • ویژگی­های فیزیولوژیک
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