اثر سالیسیلیک اسید بر القای مقاومت نعناع فلفلی به تنش شوری در شرایط گلخانه

محورهای موضوعی :

حسن نورافکن ¹ ()

تاریخ دریافت : 1392/12/01 تاریخ پذیرش : 1393/08/14 تاریخ انتشار : 1393/05/01

کلید واژه: سازگاری, تنش فیزیولوژیکی, شبه هورمون, کلریدسدیم, منتول, سمیت نمک,

چکیده مقاله :

نعناع فلفلی Mentha piperita L. یکی از مهم ترین گیاهان دارویی متعلق به خانواده نعناعیان می باشد. به منظور مطالعه اثر غلظت های مختلف سالیسیلیک اسید بر القای مقاومت به تنش شوری نعناع فلفلی، آزمایشی در قالب فاکتوریل بر پایه طرح کاملاً‌تصادفی با چهار تکرار انجام شد. برای بررسی برهمکنش سالیسیلیک اسید و تنش شوری از چهار سطح کلریدسدیم (صفر، 50، 100 و 150 میلی مول در لیتر) و سالیسیلیک اسید (صفر، 1/0، 5/0 و یک میلی مول در لیتر) استفاده گردید. گیاهان در گلدان تا رسیدن به مرحله برداشت پرورش داده شدند. در پایان آزمایش، ویژگی هایی مانند ارتفاع گیاه، تعداد شاخساره جانبی، تعداد گره، تعداد برگ، قطر ساقه اصلی و قطر سایه انداز، وزن تر و خشک شاخساره، طول میانگره، طول ریشه و وزن تر ریشه اندازه گیری شد. تنش شوری روی تعداد شاخساره جانبی، تعداد گره، تعداد برگ، قطر ساقه اصلی، وزن تر و خشک شاخساره، طول میانگره، طول ریشه و وزن تر ریشه، سالیسیلیک اسید روی تعداد شاخساره جانبی و وزن خشک شاخساره و برهمکنش آن ها روی ارتفاع گیاه، قطر سایه انداز نعناع فلفلی اثر معنی داری داشت. بیشترین اثر بازدارندگی رشد در تنش شوری با غلظت 100 میلی مول در لیتر و موثرترین غلظت سالیسیلیک اسید در سطوح 1/0 و 5/ 0 میلی مول در لیتر به دست آمد.

چکیده انگلیسی:

Peppermint (Mentha piperita L.) is one of the most important medicinal plants belonging to the Lamiaceae. In order to study the effect of different concentration of salicylic acid (SA) and salinity stress on peppermint morphological characteristics, an experiment was conducted as a factorial design based on completely randomized design with four replications. To investigate the interaction of salicylic acid and salinity stress, the following treatments were used: four NaCl concentrations of 0, 50,100 and 150 mmolL-1 and four salicylic acid 0, 0.1, 0.5 and 1 mmolL-1. The plants were grown in pots until they grow to harvesting stage. At the end of experiments, various traits such as height of plants, number of lateral branches, node and leaf, diameter of main shoot and shad of canopy, dry and fresh weight of shoot, fresh weight of root, length of internodes and root were measured. Plants that were under salinity stress level of 150 mmolL-1 died before end of experiments. The results showed that effects of salinity stress on number of lateral branches, number of node and leaf, shoot diameter, dry and fresh weight of shoot, length of internodes and root and fresh weight of root, SA on number of lateral branches and dry weight of shoot and their interaction on height of plants and shad of canopy were significant on peppermint. The highest suppress effect in salinity stress was obtained in 100 mmolL-1 NaCl and the effective in SA were 0.1 and 0.5 mmolL-1.

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