اثر طیف‌های نور ال‌ای‌دی در مقایسه با نور طبیعی گلخانه بر کیفیت نشاء حسن یوسف (Solenostemon escutellariodes ‘Wizard Scarlet’) و اطلسی (Petunia × hybrida ‘Scarlet Eye’)

علوم باغبانی

مقاله 14، دوره 33، شماره 3، آذر 1398، صفحه 537-548   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jhorts4.v33i3.79713

نویسندگان

پریا دهخدایی¹؛ سعید ریزی¹؛ مسعود قاسمی قهساره^{* 2}

¹دانشگاه شهر کرد

²دانشگاه شهرکرد

چکیده

یکی از روش­های بهبود ویژگی­های مورفولوژیکی گیاهان، تغییر کیفیت نور است. به همین منظور آزمایشی جهت بررسی اثر کیفیت نور ال­ای­دی بر ویژگی­های مورفولوژیک و فیزیولوژیک دانهال­های حسن یوسف و اطلسی انجام شد. تیمارها شامل نور طبیعی گلخانه (شاهد) و نور ال­ای­دی (نور ترکیبی 50 درصد آبی + 50 درصد و دیگری نور 100 درصد سفید) بود. در پایان، تعدادی از صفات مورفولوژیک و فیزیولوژیک اندازه­گیری شد. نتایج نشان داد که سطح برگ، ارتفاع، طول میانگره، قطر ساقه، وزن تر شاخساره و فلورسانس کلروفیل برگ دانهال حسن یوسف در نور 100 درصد سفید بیشتر از نور ترکیبی 50 درصد آبی + 50 درصد سرخ ال­ای­دی و نور طبیعی گلخانه بود. همچنین، بیشترین دمای سطح برگ (4/27 درجه سلسیوس)، میزان کلروفیل کل (8/0 میلی‌گرم بر گرم) و کاروتنوئید (30/2 میلی‌گرم بر گرم) در تیمار شاهد و بیشترین تعداد برگ (21)، وزن خشک شاخساره (17/0 گرم)، وزن تر (65/1 گرم) و خشک ریشه (11/0 گرم) در ترکیب نوری 50 درصد آبی + 50 درصد سرخ مشاهده شد. نتایج در نشاء اطلسی نشان داد که نور سفید باعث افزایش سطح برگ، وزن تر شاخساره و وزن خشک ریشه شد. دمای سطح برگ و میزان کلروفیل کل در شاهد نسبت به سایر تیمارها بیشتر بود و بیشترین میزان کاروتنوئید (12/3 میلی‌گرم بر گرم) اطلسی در نور ترکیبی 50 درصد آبی + 50 درصد سرخ حاصل شد. بر اساس نتایج بدست آمده، با جایگزینی شرایط گلخانه با نور ال­ای­دی می­توان، نشاء حسن یوسف و اطلسی را با کیفیت بالاتری تولید کرد.

کلیدواژه‌ها

فلورسانس کلروفیل برگ؛ کیفیت نور؛ نشاء؛ مورفولوژی

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