Fig 1
Gaylussacia nana (top of A, B, D) and G. tomentosa (bottom of A, C, E). A. The glaucousness (gray coloration) of the abaxial leaf surface of G. nana compared to G. tomentosa. B&C. SEM image of glaucous abaxial surface of the leaf of G. nana (B) and non-glaucous abaxial leaf surface of G. tomentosa (C). D. Habit of G. nana. E. Habit of G. tomentosa. Photographs A, D and E, from Morningside Nature Center, Alachua Co., FL, by W.S. Judd; photographs B and C by G.M. Ionta.
Source publication
The three closely related species of blue huckleberries, i.e., Gaylussacia frondosa, G. tomentosa, and G. nana, which make up the Gaylussacia frondosa complex (sect. Decamerium, subsect. Frondosae), have been variously circumscribed and classified by North American systematists. This study aims to resolve the species relationships of the Gaylussaci...
Contexts in source publication
Context 1
... observations (over many years, by W.S. Judd) of the notable and seemingly consistent morphologi- cal differences between the sympatric Gaylussacia tomentosa and G. nana in Florida motivated the present study (Fig. 1). The purpose of this study is to resolve the phylogenetic relationships within this subsection, i.e., the G. frondosa complex, by focusing on plants identified as G. frondosa, G. tomentosa and G. nana. We sought to determine appropriate species limits within the G. frondosa complex, based on phenetic, evolu- tionary, diagnostic, and ...
Context 2
... (#13). The monophyly of G. tomentosa was supported by dense non-glandular hairs on both adaxial and abaxial leaf surfaces (chars. #4 and 7), as well as long hairs on the branches (#3) and on the abaxial leaf surface (#8). Gaylussacia tomentosa specimens also were less glaucous than those of G. frondosa and especially G. nana (char. #10, see also Fig. 1). Gaylussacia frondosa (when monophyletic) was poorly supported by morphological synapomorphies: most G. frondosa specimens are characterized by sparse or absent hairs on the adaxial leaf surface (char. #4) and medium- length leaf hairs on the abaxial surface (char. #8), although the variation pattern is homoplasious. In addition, ...
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Citations
... Gaylussacia Kunth (Ericaceae: Vaccinieae) is a genus of shrubs from the Americas, closely related to Vaccinium L. (Gajdeczka et al., 2010). The genus center of diversity is in Brazil, with 43 species, of which 42 are endemic (Romão et al., 2020). ...
... Some protuberances eventually developed into adventitious shoots, while others regenerated somatic embryos (Fig. 1e) at first and then shoots. They could also be distinguished by the presence of stalked gland trichomes (Fig. 1e), also present on the leaves (Fig. 1c), which are one of the morphological characteristics used to distinguish Gaylussacia from Vaccinium within the Vaccinieae (Gajdeczka et al. 2010). On the other hand, somatic embryos had discernibly visible stages, with globular, heart-shape, and torpedo stages being distinguishable (Fig. 1e). ...
Gaylussacia brasiliensis is a bush from the Ericaceae family native to South America. It is considered an underutilized fruit species, despite its importance as a food source, medicinal plant, and forage for the native fauna. In the Florianópolis island, south of Brazil, it occurs in sand deposits between the Atlantic Ocean and the mountain chains of the Atlantic Rain Forest, in a vegetation type called “Restinga”, a harsh environment where plants are exposed to stressful conditions. Constand winds, high solar radiation, saltwater sprays, and low nutrient levels are common in the Restinga environment, making G. brasiliensis an important genetic resource to face the expected effects of climate change. Despite its importance, there are no sexual or asexual protocols available for its propagation. This is the first record of a micropropagation protocol for a plant of the Gaylussacia genus. We report a reliable protocol for in vitro establishment of G. brasiliensis cultures from seeds, and an efficient micropropagation protocol using leaf explants. A dual regeneration pathway, i.e., somatic embryos and adventitious shoots, can be obtained directly from leaf explants without an intermediating callus tissue. A low concentration of TDZ can be used to achieve this goal, and a high number of plants can be obtained rapidly, allowing advances in the research of this underutilized plant species and enabling its propagation for commercial or conservation purposes.
https://authors.elsevier.com/a/1ekov_5oYGck6T
