Matthiola Tricuspidata R. BR. (Cruciferae): Analisi Cariologica Ed Embriologica |
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| Authors: | Giovanna Cela Renzoni |
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| Institution: | Istituto di Botanica dell'Università , Pisa |
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| Abstract: | Abstract <Matthiola tricuspidata> R. Br.: karyological and embryological studies. — Karyological and embryological observations on specimens of Matthiola tricuspidata R. Br. (Cruciferae) from Siracusa (Sicily) are reported. The chromosome number, 2n = 14, is confirmed, its karyotype having the following features: z = 2n = 14 = 2M1 + 2M3 2 + 2M3 + 2M4 + 2S1 + 2S2 + 2S3 A mutant metaphase is reported. The mutation concerns only one chromosome of pair 2S1. The development of the megagametophyte follows the normal or Polygonum type. The three antipodal cells disappear very soon. The hypostase is probably connected with the xerotermic habitat in which the species lives. The endosperm is of the nuclear type. |
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