Biometria de frutos e sementes e crescimento pós-seminal de Acca Sellowiana (O. Berg.) Myrtaceae

Abstract

Resumo: Goiabeira serrana (Acca sellowiana O. Berg Burret) é uma espécie fruteira nativa do Sul do Brasil que apresenta grande potencial de uso sustentável. O objetivo da pesquisa foi avaliar características biométricas de frutos e sementes e descrever as estruturas internas da semente e o crescimento pós-seminal da goiabeira serrana. Os parâmetros avaliados foram: comprimento e diâmetro equatorial dos frutos; comprimento, largura e espessura das sementes e o comprimento total de plântulas aos vinte e oito e trinta e seis dias após a semeadura. No estudo das estruturas internas da semente utilizou-se o sal de tetrazólio. O crescimento pós-seminal foi observado diariamente desde a germinação até a expansão total dos eófilos. O delineamento experimental foi o inteiramente casualizado com quatro repetições de 25 sementes. Observou-se grande variação nos atributos biométricos estudados. A pesquisa permitiu a identificação de 6 estádios de crescimento pós-seminal da goiabeira serrana, sendo a germinação do tipo epígea, fanerocotiledonar e os cotilédones foliáceos. Conclui-se que a caracterização biométrica da goiabeira serrana é essencial na avaliação da qualidade das sementes.
 
 Palavras-chave adicionais: Feijoa sellowiana Berg, fruteira, morfologia, germinação.

Biometric characterization and tetrazolium test in Campomanesia phaea O. Berg. Landrum seeds

“…A: until 244 hours; B: until 72 hours (to allow better visualization of the soaking curve in the initial imbibition hours). A higher soaking time than that obtained in this work was reported for germination phase I in Psidium guineense seeds, which was of thirty hours (Santos et al, 2015). In Annona emarginata seeds, the change from phase I to phase II of germination only occurs when water content between 27.85% and 28.35% is reached (Costa et al, 2011), superior values to those found for cambuci seeds.…”

“…This water loss it is a feature of orthodox seeds, represents a pre-programmed phase of drying (or desiccation) in seed maturation (Castro et al, 2004). Biometric characteristics are important in the classification and evaluation of the quality of the seeds, since in some cases, those fully developed seeds are related to those with the biggest size, resulting in a higher germination percentage with the formation of more vigorous plants (Sarmento et al, 2018) since they have a better-formed embryo and a greater accumulation of reserves (Carvalho and Nakagawa, 2012), an important feature for the commercial production of seedlings of this species.…”

“…For this reason, classifying the seeds by size can be a technique used to standardize the emergence of seedlings and the size of the juvenile plants (Carvalho and Nakagawa, 2012), besides being an important tool to allow the identification of genetic variability inside populations of the same species and the correlations with environmental factors (Sarmento et al, 2018). According to Silva et al (2014), the knowledge of fruit and seed biometry is a basic requirement to allow the conservation and exploration of a species.…”

“…According to Silva et al (2014), the knowledge of fruit and seed biometry is a basic requirement to allow the conservation and exploration of a species. Many species have already been biometrically characterized; among them, species from the family Myrtaceae, such as, for instance, Campomanesia adamantium (gabiroba) (Dresch et al, 2013) and Acca sellowiana (goiabeira-serrana) (Sarmento et al, 2018).…”

TETRAZOLIUM AND INTERACTION OF TEMPERATURE AND LIGHT UNDER SEED GERMINATION IN Ormosia arborea (FABACEAE)

“…In this sense, some researches had been carried out with forest species defining the methodology for conducting the tetrazolium test, such as in Leucaena leucocephala (Lam.) (Costa and Santos, 2010), Helianthus annuus (Silva et al, 2013), Plinia cauliflora (Hössel et al, 2013), Acca sellowiana (Sarmento et al, 2018), Eugenia brasiliensis, Eugenia pyriformis (Lamarca and Barbedo, 2014), Tabebuia roseoalba (Abbade and Takaki, 2014), Eugenia uniflora (Kaiser et al, 2014), Apuleia moralis (Reis et al, 2016) and Jatropha curcas (Araújo et al, 2019).…”