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TAXONOMIC SIGNIFICANCE OF POLLEN AND SEED MICROMORPHOLOGY IN THE GENUS HESPERIS L. (BRASSICACEAE) | ||
| The Iranian Journal of Botany | ||
| مقاله 1، دوره 24، شماره 2، اسفند 2018، صفحه 91-105 اصل مقاله (1.47 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22092/ijb.2018.121073.1198 | ||
| نویسندگان | ||
| Atena Eslami Farouji1؛ Hamed Khodayari* 1؛ Mostafa Assadi2 | ||
| 1Department of Biology, Faculty of Science, Lorestan University | ||
| 2Department of Botany, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), P. O. Box 13185-116, Tehran, Iran. | ||
| چکیده | ||
| Genus Hesperis L. belongs to Brassicaceae (Cruciferae) family including 46 species in the world, of which seven taxa are distributed in Iran. Pollen and seed macro- and micromorphological features of the Iranian taxa belonging to three sections, including sects. Hesperis, Diaplictos and Pachycarpos were examined for the first time using light (LM) and scanning electron microscope (SEM). Data analyses were performed using PAST (ver. 3.14) software. The results showed that in Hesperis pollen grains are radially symmetrical, monad, isopolar, tricolpate and have a small size. Pollen grain shape is elliptic to circular in equatorial view and circular in polar view. The exine ornamentation is reticulate in all studied specimens. Seed sculpturing pattern revealed two main groups based on the presence or absence of papillae. This study clarified that both pollen and seed macro- and micromorphological characters are significant features in taxonomic classification of the genus Hesperis. Unweighted Pair Group Method with arithmetic mean (UPGMA) and Principle Component Analysis (PCA), strongly supported the sectional delimitation of taxa for most characters but not for seed qualitative characters. The results are mostly in agreement with the previous studies. | ||
| کلیدواژهها | ||
| Brassicaceae؛ Hesperis؛ microsculpturing؛ pollen؛ seed؛ Iran | ||
| عنوان مقاله [English] | ||
| اهمیّت تاکسونومیک ریزریختشناسی دانه گرده و بذر سرده Hesperis L. (تیره شب بوئیان) | ||
| نویسندگان [English] | ||
| آتنا اسلامی فاروجی1؛ حامد خدایاری1؛ مصطفی اسدی2 | ||
| 1دانشجوی دکتری سیستماتیک گیاهی گروه زیستشناسی دانشگاه لرستان | ||
| 2استاد مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران | ||
| چکیده [English] | ||
| سرده Hesperis L. متعلّق به تیره شببوئیان (Cruciferae) است و شامل 46 گونه در جهان میباشد، از این میان هفت تاکسون آن در ایران پراکنش دارد. صفات ریختشناسی و ریزریخت شناسی دانه گرده و دانه تاکسونهای ایرانی Hesperis متعلّق به سه بخش Hesperis، Diaplictos و Pachycarpos با استفاده از میکروسکوپ نوری (LM) و میکروسکوپ الکترونی نگاره (SEM) برای اوّلین بار مطالعه شد. تحلیل دادهها با استفاده از نرمافزار PAST (نسخه 14/3) انجام شد. نتایج نشان داد که دانههای گرده Hesperis متقارن شعاعی، موناد، جورقطب، سه شیاری و دارای اندازه کوچک هستند. شکل دانه گرده در نمای استوایی بیضوی تا مدور و در نمای قطبی مدور است. تزئینات اگزین در تمام نمونههای مورد مطالعه مشبک است. الگوی تزئینات دانه دو گروه اصلی را بر اساس حضور و عدم حضور زگیل آشکار نمود. این مطالعه روشن نمود که صفات ریختی و ریزریختشناسی دانه گرده و دانه صفات مهمّی در طبقه بندی تاکسونومیک سرده Hesperis هستند زیرا تحلیل جفت گروه بدون وزن با میانگین حسابی (UPGMA) و تجزیه مؤلفه اصلی (PCA) به جز در صفات کیفی دانه به شدّت از تعیین حدود بخشها حمایت میکند. نتایج عمدتاً با مطالعات پیشین انجام شده مطابقت دارد. | ||
| کلیدواژهها [English] | ||
| Brassicaceae, Hesperis, microsculpturing, pollen, seed, Iran | ||
| مراجع | ||
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