COMPARISON OF MORPHOLOGICAL AND MICROMORPHOLOGICAL STUDIES IN THE GENUS PAPAVER SECT. OXYTONA (PAPAVERACEAE) AND INTERSPECIFIC HYBRIDS

Document Type : Research Paper

Authors

1 Dept. of Plant Biology, Faculty of Biological Sciences, Kharazmi Univ. Tehran - Iran

2 Research Institute of Forests and Rangelands,Tehran, Iran.

Abstract

The leaf epidermal structure of seven taxa from the genus Papaver  L. sect. Oxytona are investigated. All taxa have the type of anomocytic stomata on abaxial surface and no stomata is present on the adaxial surface. Within the section, the species and interspecific hybrids could be identified by the following characters: stomata size, the shape of the epidermal cells and anticlinal walls on leaf abaxial surface. Seed characteristics of the species of this section were studied using scanning electron microscopy and stereomicroscope. Seeds are reniform or sometimes falcate; the epidermal cells shape varies from polygonal and rectangular to irregular polygonal and rectangular; anticlinal walls are nearly straight in P. bracteatum and slightly sinuate in P. orientale and P. setiferum. The sculpturing pattern of testa is granulate-perforate in all taxa. Pollen grains size of seven taxa  and the exine structure of P. bracteatum and P. lasiothrix were studied by SEM. P. bracteatum has the smallest pollen grains and P. setiferum × P. bracteatum the largest pollen. The basic shape of the pollen grains is prolate-spheroidal. The aperture is tri-to tetracolpate. Moreover, taxonomically important characters of taxa were observed and measured. A positive correlation is found between stomata and pollen grains size and chromosome number. Our results revealed that seed morphological characteristics have not taxonomic value in separation of taxa from each other. Also, P. lasiothrix could be reduced as synonymy of P. bracteatum. Interspecific hybrid of P. setiferum × P. bracteatum is recorded here for the first time from NW Iran. For these taxa, taxonomical characteristics, localities and geographical distributions are presented.
 

Keywords

Article Title [Persian]

مقایسه مطالعات مورفولوژی و میکرومورفولوژی بخشه sect. Oxytona از جنس Papaver و دورگه‌های بین گونه‌ای آنها

Authors [Persian]

  • زهرا توکلی 1
  • مصطفی اسدی 2
1 عضوهیئت علمی دانشکده علوم زیستی دانشگاه خوارزمی.
2 استاد پژوهشی مؤسسه تحقیقات جنگلها و مراتع کشور.
Abstract [Persian]

در این مطالعه ویژگیهای مورفولوژیکی و میکرومورفولوژیکی  7 تاکسون از بخشه Papaver sect. Oxytona با استفاده از استریومیکروسکوپ و میکروسکوپ نوری و الکترونی شرح داده شده و با یکدیگر مقایسه شدند. بر اساس صفات میکرومورفولوژی: اندازه سلولهای روزنه، شکل سلولهای اپیدرمی و دیواره جداکننده سلولها در سطح زیرین برگ، تا حدود زیادی تایید کننده تقسیم‌بندی مورفولوژیک گونه‌ها و دورگه‌های بین گونه‌ای است؛ اندازه دانه‌های گرده می‌تواند به عنوان صفات متمایز کننده گونه‌ای به شمار رود؛ ویژگیهای دانه برای تفکیک گونه‌ها مفید نمی‌باشد. همچنین شرح کوتاهی از ویژگیهای مورفولوژیکی تاکسونهای این بخشه همراه با کلید شناسایی آنها ارایه شده است. بررسیهای انجام شده برای دو گونه P. bracteatum  و P. lasiothrix نشان می‌دهد که این دو گونه تا حدود زیادی مشابه هستند. بنابراین مطابق با نظر Goldblatt گونه P. lasiothrix  مترادف گونه P. bracteatum  معرفی می‌گردد. در این مقاله دورگه دو والدیP. setiferum × P. bracteatum برای اولین بار از ایران گزارش می‌گردد.

Keywords [Persian]

  • Papaver
  • leaf epidermis
  • seed
  • Pollen grains
  • Morphology
  • Iran

References

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The Iranian Journal of Botany
Volume 19, Issue 2 - Serial Number 2
December 2013
Pages 235-249

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History

  • Receive Date: 30 December 2013
  • Accept Date: 30 December 2013

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