{"id":3800,"date":"2019-12-11T13:36:06","date_gmt":"2019-12-11T10:06:06","guid":{"rendered":"http:\/\/en.eseed.rifr-ac.ir\/?p=3800"},"modified":"2021-07-31T12:19:37","modified_gmt":"2021-07-31T07:49:37","slug":"astragalus-tenellus-bunge","status":"publish","type":"post","link":"https:\/\/eseed.rifr-ac.ir\/en\/?p=3800","title":{"rendered":"Astragalus tenellus Bunge."},"content":{"rendered":"

Astragalus tenellus <\/em>Bunge.<\/strong><\/p>\n

Hamideh Javadi and Parvin Salehi Shanjani<\/p>\n

Natural Resources Gene Bank, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization, Tehran, Iran.<\/p>\n

Uploaded at August 2021<\/p>\n

Scientific editors: Valiollah Mozaffarian and Masoumeh Izadpanah<\/p>\n

 <\/p>\n

Seed Storage<\/strong><\/p>\n

The storage behavior of this species is orthodox (desiccation-tolerant seeds); dry to 15-20% eRH and store at -20 \u00b0C.<\/p>\n

\u00a0<\/strong><\/p>\n

Germination requirements<\/strong><\/p>\n

The seeds have physical-physiological dormancy and this is related to seed coat and inhibitors. To remove the seed coat, different methods of scarification can be used (sandpaper, sulfuric acid, hot water, etc.). To break dormancy, stratification with pre-chilling (for 14 days), ultrasonic waves, and hormones (Gibberellic acid 100 ppm) are efficient. The best method for breaking dormancy is rubbing the seeds with sandpaper and moist chilling (14 days at 4 \u00b0C). Then germinate under a constant temperature of 20 \u00baC or alternating temperature 25 \u00baC (16 hours of light) and 15 \u00baC (8 hours of dark).<\/p>\n

\u00a0<\/strong><\/p>\n

Morphology<\/strong><\/p>\n

Fruit:<\/strong> pod, 2-locular, pendulous linear, stalked at the base, angular at the abdominal and gibbous at in the back, tip narrow, beaked.<\/p>\n

Fruit size:<\/strong> Length: 20-30 mm, width: 2.5-3 mm, thickness: 2.5-3 mm.<\/p>\n

Seed:<\/strong> Seeds asymmetrical, prolonged elliptic or reniform, hilum round, surface uneven, lustrous, yellow to pale-brown with brown spots.<\/p>\n

Seed size: <\/strong>Length: 2.91-4.46 mm, width: 1.47-2.03mm in an accession from Qom with 1000 seeds weight 4.8 g, which was collected in 2006, and the cultivated sample was identified by S. Reza Safavi with voucher number 105640.<\/p>\n

1000 seed weight: <\/strong>4.5-5.1 g.<\/p>\n

 <\/p>\n

Biological features<\/strong><\/p>\n

Life form:<\/strong> Perennial, without stem, with symmetric appressed plug hairs.<\/p>\n

Inflorescence, flower type, and pollination mechanism:<\/strong> Inflorescence raceme, cylindrical, elongate during the fruiting period. Flowers hermaphrodite, 5-merous, zygomorphic, calyx tubular or cylindrical with oblique tip, covered with scattered black hairs, corolla yellow. Plant monoecious, cross-pollination. Pollination is carried out by insects and wind.<\/p>\n

Time of flowering:<\/strong> June<\/p>\n

Time of seed ripening:<\/strong> June to July<\/p>\n

Seed dispersal methods:<\/strong> The seeds are displaced by weight.<\/p>\n

Geographical distribution: <\/strong>Endemic of Iran. Typus from Esfahan.<\/p>\n

Distribution in Iran: <\/strong>Center. Esfahan<\/p>\n

 <\/p>\n

Taxonomy<\/strong><\/p>\n

Family: <\/strong>Papilionaceae<\/p>\n

Genus: <\/strong>Astragalus<\/em><\/p>\n

Species: <\/strong>tenellus<\/em><\/p>\n

Common name:<\/strong> Locoweed<\/p>\n

 <\/p>\n

References and Links<\/strong><\/p>\n

Baskin, C.C. and Baskin, J.M.1998. Seeds: Ecology, Biogeography, Evolution of Dormancy and Germination. Academic Press, San Diego.<\/p>\n

Bewley, J.D. 1997. Seed germination and dormancy. The plant cell, 9: 1055-1066.<\/p>\n

Bakhshandeh Faraj-pur, A. 2014. Investigating the possibility of increasing the germination of several species (Astragalus<\/em>) using various methods of dormancy in order to multiply massive and regenerate rangelands. Master\u2019s thesis, University of Kashan, Faculty of Engineering.<\/p>\n

Ko\u017euharova, E. and Firmage, D. 2007. On The Pollination Ecology of Astragalus alopecurus<\/em> Pallas (Fabaceae) in Bulgaria. Tome, 60(8): 863-870.<\/p>\n

Ko\u017euharova, E., Tzvetanova, V. and Firmage, D. 2010. Seed germination and seedling development of two rare Astragalus<\/em> species (Fabaceae). Phytologia Balcanica, 16 (1): 51-56.<\/p>\n

Maassoumi, A.A. 2018. Flora of Iran, No.145: (Papilionaceae: Astragalus<\/em> III). \u00a0Research Institute of Forests and Rangelands Publications, p.208.<\/p>\n

Mozaffarian, V. 2012. A Pictorial Dictionary of Botany. Farhange Moaser publisher, 1088 pp.<\/p>\n","protected":false},"excerpt":{"rendered":"

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