تاثیر سدیم نیتروپروساید بر عمر گلجایی گل‌های شاخه بریده رز، لیسیانتوس و آفتابگردان

Subject Areas : Journal of Ornamental Plants

نیره نظیری مقدم ¹ , هستی هاشم آبادی ² , بهزاد کاویانی ³ , Mohammad Reza Safari Motlagh ⁴ , Mojtaba Khorrami Raad ⁵

1 - گروه باغبانی، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران
2 - دانش‌آموز، دبیرستان دخترانه فرزانگان، دبیرستان دخترانه رشت، رشت، ایران
3 - گروه باغبانی، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران
4 - گروه گیاه‌پزشکی، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران
5 - دانشکده علوم اکوسیستم و جنگل، دانشگاه ملبورن، کرسویک، استرالیا

Received: 2021-05-16 Accepted : 2021-09-25 Published : 2021-09-01

Keywords: نیتریک اکسید, اتیلن, پیری, محلول محافظ,

Abstract :

عمر گلجایی طولانی مهمترین فاکتور تعیین کننده ارزش اقتصادی در گل­های شاخه بریده است. در این پژوهش اثر سدیم نیتروپروساید (SNP) بصورت تیمار پالس در 4 سطح 0، 20، 40 و 60 میکرومولار بر عمر گلجایی گل­های شاخه بریده رز (Rosa hybrida L.)، لیسیانتوس (Eustoma grandiflorum) و آفتابگردان (Helianthus annuus L.) بررسی شد. این آزمایش بصورت فاکتوریل در قالب طرح کاملا تصادفی در سه تکرار و 12 تیمار اجرا شد. نتایج نشان داد که بالاترین عمرگلجایی گل­های شاخه بریده رز (33/14 روز) و آفتابگردان (5/14 روز) با کاربرد 40 میکرومولار SNP بدست می­آید در حالی که بیشترین عمر گلجایی لیسیانتوس (00/14 روز) متعلق به تیمار 20 میکرومولار SNP بود. تیمار 20 میکرومولار SNP موثرترین تیمار در حفظ ماده خشک در گل­های شاخه بریده رز بود.کاربرد SNP نسبت به شاهد بطور معنی­داری موجب کاهش تولید اتیلن در گل­های شاخه بریده رز و لیسیانتوس شد. کمترین اتیلن تولید شده در گل­های شاخه بریده آفتابگردان (03/0 نانولیتر در لیتر در ساعت در هر گرم وزن تر) به تیمار 60 میکرومولار SNP تعلق داشت. SNP اثر معناداری بر جذب آب، جمعیت میکروبی محلول گلجایی و انتهای ساقه و کلروفیل b نداشت؛ اما بطور معنی­داری موجب حفظ پروتئین در گل­های شاخه بریده مورد آزمایش شد. بطورکلی می­توان گفت که SNP از طریق مهار تولید اتیلن و حفظ پروتئین­ها موجب بهبود ماندگاری پس از برداشت در گل­های شاخه بریده رز، لیسیانتوس و آفتابگردان می­شود.

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