The germination success of the cut seeds of Eugenia pyriformis depends on their size and origin

Abstract

-Seeds of Eugenia pyriformis may produce several seedlings after cutting. Both the type of cutting and the size of the seed can determine the success in obtaining new seedlings. The size of the seeds is dependent on both the number of seeds per fruit and the conditions in which seeds develop, as well as the biometric characteristics of these seeds obtained from different regions and seasons. The seeds from each origin were evaluated in length, width, thickness, water content and dry mass, as well as the average number of seeds per fruit. From one of the regions, seeds were grouped according to the number of seeds per fruit and also according to their size, and then cut into two and four parts, and then analyzed for the fragments germination. The results demonstrated the high capacity of these seed fragments to produce new seedlings, but the capability reduces with the reduction in seed size. This size depends not only on the number of seeds per fruit, but also on the region and the period of the seed production.Index terms: germination, seed cutting, Myrtaceae, uvaia.O sucesso da germinação de sementes fracionadas de Eugenia pyriformis depende do seu tamanho e da sua origem RESUMO -Uma semente de uvaieira (Eugenia pyriformis) pode produzir várias plântulas quando fracionada. A posição do corte e o tamanho da semente influenciam o sucesso da obtenção de novas plântulas. O número de sementes por fruto e as condições nas quais as sementes se desenvolvem podem promover diferenças nesse tamanho. No presente trabalho foram analisados o grau de influência do número de sementes por fruto sobre a capacidade das sementes de uvaieira em germinar após fracionamento e os aspectos biométricos de sementes de uvaieira obtidas em diferentes regiões e épocas. As sementes de cada origem foram avaliadas quanto ao comprimento, largura, espessura, conteúdo de massa fresca e seca e teor de água. De uma das regiões, sementes foram agrupadas segundo a quantidade de sementes por fruto e também segundo seu tamanho e, a seguir, foram fracionadas em duas e quatro partes e analisadas quanto à capacidade germinativa dos fragmentos obtidos. Os resultados demonstraram a elevada capacidade dos fragmentos dessas sementes em formar novas plântulas, mas tal capacidade reduz concomitante à redução no tamanho da semente. Esse tamanho depende não apenas do número de sementes por fruto, mas também da região e da época de produção das sementes.Termos para indexação: germinação, fracionamento de semente, Myrtaceae, uvaia.

Germination inhibits the growth of new roots and seedlings in Eugenia uniflora and Eugenia brasiliensis

“…Eugenia species seeds have the potential to generate new roots and even whole plants, even after the removal of much of their reserves (Silva et al, 2003;Prataviera et al, 2015), which is rare in nature. This feature can be used technologically to increase the potential of plantlet production.…”

Pecan Propagation: Seed Mass as a Reliable Tool for Seed Selection

“…Bispo et al [6] reported direct interference of seed size in seedling development of Anadenanthera colubrina, with larger seeds yielding higher growth. Evaluating the capacity of seed fragments of Eugenia pyriformis to produce new seedlings, Pratavieira et al [14] observed a significantly higher capacity by larger seeds. However, Moles and Westoby [15] found no relationship between seed mass and survival through the transition from seed to emerged seedlings in populations of 33 species growing under natural conditions.…”

Cutting and regeneration of roots and seedlings from seeds of Eugenia candolleana DC. at different maturity stages

“…That way, a 4 × 3 (ages × eliminations) factorial arrangement was constituted in a completely randomized experimental design, with four replications of 20 seeds. Analysis of variance (F test, 5%) was used on the results, and the means were compared to each other by the Tukey test at 5% (Santana and Ranal, 2004).…”

“…Studies performed with cuttings of Eugenia spp. seeds showed that more than one plant can be obtained from one seed (Silva et al, 2005;Amador and Barbedo, 2011;Teixeira and Barbedo, 2012;Prataviera et al, 2015;Calvi et al, 2016). It was also found that dependence on cuttings for development of these tissues indicates that injuries in seeds may initiate some process of inducing formation of new roots and seedlings, or they may block the autoinhibition of these formations in seeds (Delgado and Barbedo, 2011;Amador and Barbedo, 2015).…”