CYTOLOGICAL STUDIES OF THE GENUS CLYPEOLA L. (BRASSICACEAE) IN IRAN

Document Type : Research Paper

Authors

1 Department of Biology, Faculty of Basic Science, Alzahra University

2 Faculty of Biological Sciences, Shahid Beheshti University

Abstract

TheKaryotype and meiotic studies are investigated in 17 populations of four Clypeola species growing in Iran for the first time. The species studied showed 2n=2x=14 for C. lappacea and C. dichotoma while C. aspera and C. jonthlaspi were tetraploids. For C. aspera 2n=4x=26 & 24 and for C. jonthlaspi 2n=4x=32 were counted, supporting the published reports on C. jonthlaspi, C. lappacea, C. dichotoma and C. aspera. The karyotypic study was performed for C. aspera and C. lappacea. The chromosomes in these species were mainly metacentric and sub-metacentric. Mixoploidy and polysomaty has been observed in C. aspera populations. Meiosis studies were performed on 6 populations of three species of Clypeola. Chromosome number of n=16 for C. jonthlaspi, n=12 & 13 for C. aspera and n=7& 8 for C. lappacea were observed. Disploidy was observed in C. aspera and C. lappacea. Desynapsis and B chromosome are present in C. lappacea. Unreduced pollen grains were observed in three species.

Keywords

Article Title [Persian]

مطالعات سیتولوژیکی جنس . Clypeola L از خانواده شب بو در ایران

Authors [Persian]

  • مریم کشاورزی 1
  • سوسن عباسیان 1
  • مسعود شیدائی 2
1 دانشیار گروه زیست‌شناسی دانشگاه الزهراء
2 استاد دانشکده زیست‌شناسی دانشگاه شهید بهشتی
Abstract [Persian]

مطالعات کاریوتیپی و میوزی در 17 جمعیت از چهار گونه از جنس Clypeola برای نخستین بار در ایران مورد بررسی واقع شده است. گونه‌های مورد بررسی از نظر وضعیت کروموزومی در دو گونه C. lappacea و C. dichotoma دیپلوئید با 2n=2x=14 است در حالی که دو گونه C. aspera و C. jonthlaspi تتراپلوئید بودند. نتایج 2n=4x=26 & 24 برای گونه C. aspera و 2n=4x=32 برای C. jonthlaspi گزارشات موجود در خصوص C. jonthlaspi, C. lappacea, C. dichotoma و C. aspera را حمایت می کنند. مطالعات کاریوتیپی بر روی C. aspera و  C. lappacea انجام شد. در این دو گونه کروموزمها اساسا متاسانتریک و ساب متاسنتریک بودند. Mixoploidy و polysomaty در جمعیتهای C. aspera مشاهده شد. مطالعات میوزی بر روی 6 جمعیت از 3 گونه از Clypeola صورت پذیرفت. عدد کروموزومی n=16 در C. jonthlaspi ،n=12, 13 برای C. aspera و n=7, 8 برای C. lappacea مشاهده شد. در گونه های C. aspera و C. lappacea دیسپلوئیدی مشاهده شد. دسیناپسیس و حضور کرووموزوم B  در گونه C. lappacea دیده شد. دانه های گرده کاهش نیافته در هر سه گونه رویت شد.

Keywords [Persian]

  • Clypeola
  • Brassicaceae
  • Karyotype
  • cytogenetic
  • meiosis
  • desynapsis
  • disploidy
  • B chromosome

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The Iranian Journal of Botany
Volume 20, Issue 2 - Serial Number 2
December 2014
Pages 201-210

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History

  • Receive Date: 30 May 2014
  • Revise Date: 30 June 2014
  • Accept Date: 01 October 2014

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