期刊
AGRONOMY-BASEL
卷 12, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/agronomy12010103
关键词
gibberellins; seeds; Suaeda edulis; romerito; halophile; germination; dormancy
Suaeda edulis, a halophile species, faces difficulties in germination and reproduction in saline environments. The application of a plant-growth bioregulator containing gibberellins improved germination in vitro. The optimal dose of gibberellins was found to be 25 mg L-1, resulting in the highest germination percentage and rate at 48 hours.
Suaeda edulis (Flores Olvera & Noguez) is a halophile species that grows in saline environments, with concomitant difficulties to germinate and reproduce. Once a null germination under a salinity gradient or fresh water was observed, a plant-growth bioregulator (BioR) was applied to interrupt dormancy and improve germination in vitro. This BioR is composed of gibberellins and adjuvant regulators; and 12.5, 25.0, and 37.5 mg L-1 of gibberellins with immersion at 24, 48, and 72 h were assayed. Most of the normality and homoscedasticity tests were favorable, except in three of 24 cases. On the germination percentage (transformed values), the dose 25.0 mg L-1 reflected the highest values of 5.5 and 6.0 units at 48 and 72 h. For the mean germination time, the highest level of 37.5 mg L-1 at 24 h reflected the best response. For the germination rate, the best one was 25 mg L-1 at 48 h, reaching 12% per day, but for the germination speed coefficient, the best value was observed with 25.0 mg L-1 at 24 h. It was concluded that to improve germination of S. edulis seeds, it is necessary to assess a dose-gradient of gibberellins, starting at 25.0 mg L-1, with higher values to break dormancy.
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