اثر ریزنمونه و برخی تنظیم‌کننده‌های رشد گیاهی بر باززایی و مقدار وین‌کریستین پروانش ‏‏(‏Catharanthus roseus L.‎‏)‏

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکده کشاورزی، دانشگاه بوعلی سینا، همدان، ایران

2 دانشیار، دانشکده کشاورزی، دانشگاه بوعلی سینا، همدان، ایران

چکیده

هدف این پژوهش بهینه‌سازی غلظت‌های مختلف تنظیم‌کننده‌های رشد و معرفی بهترین ریزنمونه مؤثر بر افزایش راندمان کالوس‌زایی و باززایی گیاه پروانش (Catharanthus roseus L.) و نیز شناسایی مرحله رشدی تولیدکننده بیشترین مقدار وین‌کریستین بود. آزمایش به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی انجام شد. عامل اول نوع ریزنمونه در هشت سطح و عامل دوم غلظت‌های مختلف تنظیم‌کننده‌های رشد در نه سطح بود. نتایج نشان داد بیشترین درصد کالوس‌زایی از محیط حاوی 8 میکرومولار 2,4-D به همراه 2 میکرومولار بنزیل‌آمینو‌پورین (BAP) و به ترتیب در ریزنمونه تک گره (100 درصد)، هیپوکوتیل (100 درصد)، برگ (100 درصد)، ریشه (16/99 درصد)، تخمدان (33/98)، دمبرگ (83/95 درصد)، بساک (16/94) و برگ لپه‌ای (33/93) دیده شد. کالوس‌های‌ مشتق شده از هیپوکوتیل، بساک و تخمدان توانایی ایجاد جنین بدنی با راندمان بالا را داشتند. مقدار 8/0گرم در لیتر کازئین هیدرولیزات منجر به بالاترین درصد جنین‌زایی شد. بالاترین درصد جوانه‌زنی از ریزنمونه حاصل از هیپوکوتیل (66/53 درصد)‌، بساک (00/51 درصد) و تخمدان (00/46 درصد) به‌ دست آمد. همچنین درصد باززایی از ریزنمونه‌‌های هیپوکوتیل بساک و تخمدان به ترتیب 78، 73 و 68 درصد بود. بیشترین مقدار وین‌کریستین در مقایسه انواع کالوس و مراحل مختلف رشد، از گیاهان باززایی شده از کالوس مشتق شده از بساک، تخمدان و هیپوکوتیل به دست آمد و مقدار آن 4/1 میکروگرم در هر گرم وزن خشک و بیشتر از کالوس غیر‌ جنین‌زای ریزنمونه‌های مذکور بود. 

کلیدواژه‌ها


عنوان مقاله [English]

Effect of explants and some plant growth regulators on regeneration and amount of ‎periwinkle’s vincristine (Catharanthus roseus L.)‎

نویسندگان [English]

  • Leila Farzaei 1
  • Mohammad Sayyari 2
1 Ph. D. Candidate, Faculty of Agriculture, Bu‏ ‏Ali Sina University, Hamedan, Iran
2 Associate Professor, Faculty of Agriculture, Bu‏ ‏Ali Sina University, Hamedan, Iran
چکیده [English]

The aim of this study was to optimize different concentrations of some growth regulators and introduce the effective explants which lead to increase callus induction and regeneration efficiency in Catharanthus roseus L. and recognize growth stage which produce the highest amount of vincristine. The experiment was conducted as a factorial with a completely randomized design. The first factor was explant type at eight levels and the second factor was different concentrations of growth regulators at nine levels. The results showed that the highest percentage of callus induction was observed the medium containing 8 μM 2,4-D with 2 μM BAP in single node (100 percent), hypocotyl (100 percent), leaf (100 percent), root (99.16 percent), ovary (98.33 percent), petiole (95.83 percent), anther (94.16 percent) and cotyledon (93.33 percent) explants, respectively. Calluses derived from hypocotyl, anther and ovary explants were able to produce highly efficient somatic embryos. 0.8 g L-1 casein hydrolyzate cause the highest percentage of embryogenesis. The maximum germination percentage was obtained from explants drived from hypocotyl (53.66 %), anther (51.00 %) and ovary (46.00 %). Also, the regeneration percentage of hypocotyl, anther and ovary explants was 78, 73 and 68 percent, respectively. The topmost amount of vincristine in comparison with different types of calluses and different stages of growth was obtained from plants regenerated from callus which derived from anther, ovary and hypocotyl explants and the amount was 1.4 μg g-1 dry weight more than non-embryonic callus of the mentioned explants.

کلیدواژه‌ها [English]

  • Anther
  • callus induction
  • habituation
  • ovary
  • somatic embryo
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