Seed and fruit size affect soaking and physiological seed quality in Campomanesia adamantium?

Abstract

The size of fruits and seeds can affect the seed germination process and aspects related to the vigor of the seedlings formed. Our aim was to characterize fruit and seed biometrics, evaluate the effect of seed size on soaking and the effect of seed size and temperature on the germination and vigor of Campomanesia adamantium . The fruit was evaluated to determine longitudinal diameter, transverse diameter, fresh mass and empty, full and total seed quantities. The seeds were sorted into small, medium and large classes and then measured for length, width, thickness and mass. Seeds from each class were submitted to the germination test at 25 and 30 °C. The germination and vigor (first count, germination speed index, mean germination time and seedling length) data were evaluated by analysis of variance and a means test. Seeds from each size class were weighed repeatedly during soaking. The soaking data were fit to logistic and Peleg models and best fit curves with confidence bands were constructed to compare the effect of seed size. Fruit morphology showed high intraspecific variability. Germination was not affected by seed size or test temperature. Large seeds yielded taller seedlings while the 25 °C germination temperature produced the highest seedling growth rate. The small and medium seeds showed all three phases of the soaking process. Finally, soaking was initially slower for the large seeds than for the small and medium seeds.

Climate and seed size of a dry forest species: influence on seed production, physiological quality, and tolerance to abiotic stresses

“…Provenance of seeds influenced germination at extreme temperatures, in which at 15 o C for large seeds and at 40 o C for small seeds from Jutaí obtained the higher percentages (Table 2). Seed vigor and seedling development and establishment are positively correlated to larger seeds (Domic et al, 2020), in many cases germination at optimum temperature range is not affected by seeds size (Bispo et al, 2017;Leão-Araújo et al, 2020). On the other hand, since stress may have transgenerational effects on seeds and seedlings, resulting in stress-induced improvement of seed endurance due to inter-generational stress memory, formed by stressinduced changes in the epigenome of the seedling (Hatzig et al, 2018).…”

Morfometria dos frutos, sementes e germinação de Psidium schenckianum Kiaersk

“…Alguns trabalhos de pesquisas vêm relacionando o peso das sementes com o potencial germinativo e vigor das sementes. Sabe-se que sementes mais pesadas possuem maior quantidade de fotoassimilados durante sua formação, maior quantidade de tecidos de reserva, consequentemente maior vigor e germinação (Leão-Araújo, et al, 2020;Padilha, Donatto & Sobral, 2021).…”

Associations between Integument Color and Physical and Physiological Quality in Pterodon pubescens Seeds

“…The first phase comprises rapid seed imbibition, the second (stationary) phase, intense hydration and breathing intensity reductions, and the third, stabilization. The end of an imbibition curve begins with the disruption of the seed coat by the embryo’s radicle, when a new and slight water absorption occurs due to the metabolic requirements of embryo cell divisions and elongations, characterizing the third phase of the germination process [ 17 , 18 , 19 ].…”