The ontogeny of the pericarp in the subtribe Eugeniinae O. Berg (Myrteae, Myrtaceae) reveals a drupe-like fruit in Myrcianthes pungens (O. Berg) D. Legrand

Sbais, Patrícia Gonçalves; Mazine, Fiorella Fernanda; Thadeo, Marcela; Mourão, Káthia Socorro Mathias

doi:10.1016/j.flora.2021.151969

Cited by 3 publications

(1 citation statement)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Jossinia (group Y) may be the plesiomorphic condition that persisted in these groups. It is interesting to note that in M. pungens, the fruit is like a drupe, which is a recently recorded trait for this genus (Sbais et al, 2022), and that the seed-coat is mostly made up of slightly thick-walled cells. Results from more comprehensive studies of the fruits and seeds of Myrtaceae that focus on these characters, as well as studies that combine geographic distribution and dispersion, might support these hypotheses.…”

Section: Fruit Opening × Lignified Seed-coatmentioning

confidence: 90%

The anatomy of the seed-coat includes diagnostic characters in the subtribe Eugeniinae (Myrteae, Myrtaceae)

Sbais

Machado²,

Valdemarin³

et al. 2022

Front. Plant Sci.

Self Cite

View full text Add to dashboard Cite

The subtribe Eugeniinae comprises of two genera, Eugenia (ca. 1,100 species) and Myrcianthes (ca. 40 species). Eugenia is the largest genus of neotropical Myrtaceae and its latest classification proposes 11 sections. This study describes the seed anatomy of forty-one species of Eugeniinae in order to provide possible diagnostic characteristics. Following standard anatomical techniques, flower buds, flowers, and fruits were processed and analyzed using microtome sections and light microscopy. The phylogeny used the regions ITS, rpl16, psbA-trnH, trnL-rpl32, and trnQ-rps16, following recent studies in the group. Ancestral character reconstruction uncovered that: (1) the ancestral ovule in Eugeniinae was campylotropous (98.9% probability), bitegmic (98.5% probability), and unitegmic ovules arose on more than one lineage independently within Eugenia; (2) the pachychalazal seed-coat appeared with a 92% probability of being the ancestral type; (3) non-lignified seed-coat (24,5% probability) and aerenchymatous mesotesta (45.8% probability) are diagnostic characters in Myrcianthes pungens (aerenchymatous mesotesta present in the developing seed-coat) and in the species of E. sect. Pseudeugenia until the species of E. sect. Schizocalomyrtus and it is the type of seed-coat that predominates in most basal sections on the tree; (4) the partial sclerification (only in the exotesta—exotestal seed-coat) is mainly observed in species of E. sect. Excelsae, E. sect. Jossinia (group X), and E. sect. Racemosae (22.2% probability); (5) and in the species of the recent lineages of Eugenia, with a probability of 27.2%, predominate the exomesotestal or testal construction of the seed-coat [character observed in almost all species analyzed of E. sect. Jossinia (group Y) and E. sect. Umbellatae]. A dehiscent fruit is considered as a plesiomorphic state in Myrtaceae; the ancestor of this family had seeds with a completely sclerified testa, and the other testa types described for the current species with dehiscent and indehiscent fruits are simplified versions of this ancestral type. Perhaps, this means that the sclerified layers in the seed-coat have remained in whole or in part as a plesiomorphic condition for taxa with a capsule and bacca. Maintaining the plesiomorphic condition may have represented a selective advantage at some point in the evolutionary history of the family and its groups.

show abstract

Section: Fruit Opening × Lignified Seed-coatmentioning

confidence: 90%

The anatomy of the seed-coat includes diagnostic characters in the subtribe Eugeniinae (Myrteae, Myrtaceae)

Sbais

Machado²,

Valdemarin³

et al. 2022

Front. Plant Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

The complete chloroplast genome sequence of Eugenia klotzschiana O. Berg unveils the evolutionary dynamics in plastomes of Myrteae DC. Tribe (Myrtaceae)

Carvalho

Nunes

Sobreiro

et al. 2023

Gene

View full text Add to dashboard Cite

A Taxonomic Revision of the Lathberry Clade ofEugenia(Myrtaceae)

et al. 2022

View full text Add to dashboard Cite

Abstract— The Lathberry Clade includes seven species of Eugenia sect. Umbellatae (Myrtaceae) distributed from Puerto Rico through the Lesser Antilles. Members of the Lathberry Clade are trees and shrubs distinguished from other Antillean species by a combination of dull twigs, glabrous leaves with a raised midvein, glomerate or fasciculate inflorescences predominantly borne below the leaves on old wood, closely spaced and ascending inflorescence bracts, spheroidal fruits turning red or purple at maturity with the calyx lobes erect or spreading and often torn away, and a unique, large deletion in the plastid psbA-trnH intergenic spacer region. We examined the morphology, leaf venation, and seed coat anatomy of the Lathberry Clade and constructed a phylogeny using non-coding nuclear genetic regions. The taxonomic treatment includes a key to the species, distribution maps, and extinction risk assessments. We recognize Eugenia sintenisii from Puerto Rico and E. cordata var. caribaea (nom. nov.) from the Lesser Antilles in place of E. cordata var. sintenisii and synonymize E. earhartii with E. stirpiflora. Six lectotypes are designated.

show abstract

The ontogeny of the pericarp in the subtribe Eugeniinae O. Berg (Myrteae, Myrtaceae) reveals a drupe-like fruit in Myrcianthes pungens (O. Berg) D. Legrand

Cited by 3 publications

References 30 publications

The anatomy of the seed-coat includes diagnostic characters in the subtribe Eugeniinae (Myrteae, Myrtaceae)

The anatomy of the seed-coat includes diagnostic characters in the subtribe Eugeniinae (Myrteae, Myrtaceae)

The complete chloroplast genome sequence of Eugenia klotzschiana O. Berg unveils the evolutionary dynamics in plastomes of Myrteae DC. Tribe (Myrtaceae)

A Taxonomic Revision of the Lathberry Clade ofEugenia(Myrtaceae)

Contact Info

Product

Resources

About