The effects of methanol and ethanol foliar application under salinity stress on some physiological characteristics of Pelargonium graveolens L.

Document Type : Research Paper

Author

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

Abstract

To study the effects of methanol and ethanol foliar application (0, 10 and 20 % v/v) and NaCl salinity stress (0, 75 and 150 mM) on yield and some physiological traits of geranium (Pelargonium graveolens L.), a factorial experiment was conducted based on completely randomized design with three replications. Salinity showed significant effect on all characteristics, except root dry weight, chlorophyll b and Fe content. Effect of foliar application of methanol and ethanol was significant on proline, protein, chlorophyll a, essential oil, Fe and K content, root dry weight and IC50. The results also revealed the significant interaction of salinity by foliar application of alcohol in relation to the chlorophyll a and protein content. The greatest protein and chlorophyll a contents were recorded by the NaCl0 + methanol20% treatment, which was significantly different from the corresponding control. Dry weight of aerial parts, K/Na ratio, essential oil, K, P, Fe and Zn contents were negatively affected by the salinity stress. With increasing salinity stress the amounts of malondialdehyde and H2O2 were elevated. Among alcohol treatments, methanol foliar application was more effective than ethanol. Methanol had better effect on IC50, root dry weight, Fe, K and essential oil content, while ethanol20% increased the proline content significantly as compared to the methanol and control treatments. Overall, the results indicated that foliar application of methanol ameliorated the negative effects of salinity in geranium, when averaged over the salinity levels under study.

Keywords

Article Title [Persian]

تاثیرمحلول پاشی با اتانول و متانول بر برخی ویژگی های فیزیولوژیک شعمدانی عطری تحت تنش شوری

Author [Persian]

  • لمیا وجودی مهربانی
گروه زراعت و اصلاح نباتات، دانشگاه شهید مدنی آذربایجان، تبریز
Abstract [Persian]

به­ منظورمطالعه تاثیر محلول­پاشی با اتانول و متانول (صفر، 10و 20 درصد حجم/حجم) و تنش شوری کلرید سدیم (صفر، 75 و 150 میلی­ مولار) بر عملکرد و برخی صفات فیزیولوژیک شعمدانی عطری، آزمایشی بر مبنای فاکتوریل در قالب طرح کاملا تصادفی با سه تکرار اجرا شد. شوری تأثیر معنی ­داری بر کلیه صفات، به جز وزن خشک ریشه، کلروفیل b و محتوای آهن داشت. اثر محلول پاشی با متانول و اتانول بر میزان پرولین، پروتئین، کلروفیل a، اسانس، آهن و پتاسیم، وزن خشک ریشه و IC50 معنی­  دار بود.همچنین، نتایج نشان­ دهنده وجود اثر متقابل معنی­ دار شوری با محلول پاشی الکل در رابطه با محتوای کلروفیل  aو پروتئین بود. بیشترین مقادیر پروتئین و کلروفیل a در تیمار  + NaCl0متانول 20٪ ثبت شد که با تیمارهای شاهد مربوطه تفاوت معنی­ داری داشتند.وزن خشک بخش هوایی، نسبت K/Na، میزان اسانس، پتاسیم، فسفر، آهن و روی تحت تأثیر منفی تنش شوری قرار گرفتند. با افزایش تنش شوری میزان مالون دی آلدئید و H2O2 افزایش یافت. در بین تیمارهای الکل، محلول پاشی با متانول نسبت به اتانول مؤثرتر بود. متانول تأثیر بهتری بر IC50، وزن خشک ریشه، میزان آهن، پتاسیم و اسانس داشت، در حالی که اتانول 20% مقدار پرولین را به طور معنی­ داری نسبت به تیمارهای متانول و شاهد افزایش داد. به طور کلی، نتایج نشان داد که استفاده از محلول پاشی متانول باعث جبران اثرات منفی شوری بر شمعدانی عطری، در میانگین سطوح شوری، شد.

Keywords [Persian]

  • اسانس
  • شعمدانی عطری
  • کلروفیل
  • مالون دی آلدئید
  • NaCl

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Journal of Plant Physiology and Breeding
Volume 9, Issue 1
June 2019
Pages 63-73

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