In vitro germination and structure of hard seed testa of natural tetraploid Trifolium pratense L.
H. Çölgeçen1*, H. N. Büyükkartal2 and M. C. Toker2
1Zonguldak Karaelmas University, Faculty of Arts and Science, Department of Biology, 67100 Ä°ncivez, Zonguldak,Turkey.
2Ankara University, Faculty of Science, Department of Biology, 06100 TandoÄŸan, Ankara,Turkey.
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