Different Treatments for Breaking Dormancy of Leucaena Seeds (Leucaena leucocephala)

Abstract

The objective of the study was to evaluate the influence of methods for breaking dormancy the seeds of tropical forage legume Leucaena leucocephala (Lam.). The seed treatments were: (T1) water at 100 ºC/10 min; (T2) water at 100 ºC/1 min; (T3) Acetone (10 min); (T4) Ethyl alcohol (10 minutes); and (T5) intact seeds (control). Data were analyzed using a completely randomized design with eight replications, and it was adopted the Tukey test at 5% significance level. The treatment T1, had the highest speed of germination of seeds GSI, differed (P < 0.05). The T5 treatment (control) was the slowest response, that treatments that passed through some break dormancy until the seventh day after the beginning of the test (Germ7), with an amount of 20% accumulation of germinated seeds. The worst result of germination it was T5, with 30% of non-germinated seeds after 15 days of sowing.

COMPARATIVE EFFECT OF HYDRO AND HALOPRIMING ON SEED GERMINATION AND SEEDLING GROWTH OF IPIL IPIL (Leucaena leucocephala)

“…Koobnye et al (2018) observed seed germination of 84.3% in response to the seed soaking in hot water at 800C for five minutes. Valente et al (2017) The application of hot water at a temperature of 100°C for a duration of ten minutes resulted in the highest observed germination speed. Hot water treatment has been investigated for its ability to promote seed germination by influencing several factors such as increasing seed coat permeability to facilitate water absorption, facilitating gaseous exchange (Longer and Degago, 1996), and releasing inhibitors (Mohamed-Yaseen et al, 1994).…”

“…The hot water method is used to break seed dormancy, although the outcomes vary depending on the legume, as discovered by Nascimento and Oliveira (1999). Valente et al (2017) observed the lowest seed germination index when they used acetone for ten minutes, ethyl alcohol for ten minutes and intact seeds (control). Rusdy (2016) observed maximum seed germination in sulfuric acid treatment regardless of soaking time.…”

Effects of mineral salts on forage seeds germination

“…The cultivation of forage species that present dormant seeds becomes a problem due to delay in the germination of these seeds, which slows down the development of the seedlings and is susceptible to fungal attacks, which can cause both production and economic losses (Santos et al, 2004;Valente et al, 2017). For it to germinate, the seed must be alive and not dormant, and the ability of a seed to germinate under a broad limit of conditions defined as the manifestation of its vigor depends, among other factors, on the environmental conditions found at the place where it was sown.…”