Taxonomic evaluation of reproductive characters in Nyctaginaceae

Sukhorukov, A.P.; Nilova, M.V.; Rosetto, F.; Moore, M.J.; Douglas, N.A.

Авторы: Sukhorukov A.P., Nilova M.V., Rosetto F., Moore M.J., Douglas N.A.
Сборник: Caryophyllales 2018
Тезисы
Год издания: 2018
Место издания: IBUNAM Mexico
Аннотация: Nyctaginaceae is one of the most diverse families in the core Caryophyllales, comprising approximately 400 species. A persistent accessory fruit, the anthocarp, deriving from a uniseriate perianth and covering the fruit, is of special interest, because it has never been investigated in detail across the family. 150 species from 27 genera were included in this analysis. The representatives of earlier branching lineages of the family (tribes Leucastereae and Boldoeae) have an anthocarp without a distinct distal petaloid limb, or the anthocarp teeth are dark coloured like in Reichenbachia. The anthocarp in Boldoeae and Reichenbachia (Leucastereae) remains herbaceous until dissemination, with a simplified anatomical structure consisting of several-layered, thin-walled cells. Although the anthocarps of the rest of Leucastereae (Andradea, Ramisia and Leucaster) are morphologically distinct, their anatomical topography does not have drastic differences from the structure of Reichenbachia. Anatomically, the anthocarp is more complicated and diverse in remaining clades of the family, with simultaneous simplification of the fruit and seed covers (pericarp and seed coat, respectively). In Colignonieae, the calyx-like anthocarp is anatomically differentiated into thin-walled parenchyma and sclerenchyma sheath, similar to the remaining tribes of the family. The Colignonieae, Pisonieae, and Bougainvilleeae all possess an anthocarp that at flowering stage is green or yellowish outside and diversely colored and petaloid (white, lilac, or yellow) on the inner surface. Pisonieae is the first tribe in the Nyctaginaceae with an anthocarp that has been drastically changed its shape, colour and consistency compared with basal tribes. The prominent limb, equaling or exceeding the anthocarp-forming perianth portion, is remarkable in Bougainvillea (Bougainvilleeae) and all Nyctagineae; in the latter, it reaches 17 cm in some Acleisanthes and Mirabilis. The emergence of the large and diversely coloured limb in Nyctagineae is connected with pollination by different Hymenoptera and Lepidoptera. The tribe Nyctagineae is also remarkable fo
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Taxonomic evaluation of reproductive characters in Nyctaginaceaeтезисы доклада

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