Gibberellic acid promotes dormancy-breaking of rice seeds and the formation of abnormal seedlings

Garcia, Jaquelini; Castoldi, Camile Thais; Andrade, Gisiane Camargo de; Coelho, Cileide Maria Medeiros; Uarrota, Virgílio Gavicho

doi:10.5965/223811712042021278

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…The application of GA3 appears to be essential for overcoming dormancy barriers and triggering the initial stages of germination. It likely stimulates the activity of hydrolyzing enzymes responsible for breaking down stored reserves within the seed, facilitating the embryo's growth and metabolic activation [38]. As germination advances, the focus shifts to the role of the substrate.…”

Section: Discussionmentioning

confidence: 99%

Sowing Media and Gibberellic Acid Influences Germination and Seedling Growth of Chilgoza Pine (Pinus gerardiana. Wall)

Salari,

Kumar,

Wani

et al. 2023

IJPSS

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Pinus gerardiana Wall. recognized for its significant contribution to nut production, holds ecological and economic importance as a forestry species with limited range primarily found in Afghanistan. The species displays either extremely low or non-existent levels of natural regeneration. Due to irregular and uncommon seed years, problems with dormancy, and other factors, this species' natural habitat renewal is slowed down. Hence, we conducted a study to examine how different substrates and gibberellic acid (GA3) affect the germination and growth of Chilgoza pine seedlings. The substrates were grouped into three types, each containing varying proportions of soil, sand, and farmyard manure (FYM): M1 (1:1:1), M2 (1:1/2:1/2), M3 (1:1/3:2/3). Additionally, three concentrations of GA3 (0, 50, and 100 ppm) were used to assess their impact on germination and seedling growth. The results revealed that, with the exception of mean germination time (MGT) at 42.36 days, the highest values for final germination percentage (FGP) at 58.66%, germination index (GI) at 274, germination rate index (GRI) at 75.01, shoot fresh weight (SFW) at 8.74 g, shoot dry weight (SDW) at 4.78 g, shoot length (SL) at 219.80 mm, and seedling vigor index (SVI) at 1291926.02 were achieved when seeds were initially soaked in a 100 ppm GA3 solution for 6 hours and then planted in a medium with equal proportions of soil, sand, and FYM. The effects of GA3 concentrations were significant in influencing seedling growth, while substrate effects strongly impacted seed germination. This indicates that Chilgoza seeds possess ample gibberellin for germination but this is reduced during the seedling growth phase. The response of seedling vegetative growth to GA3 concentrations exhibited a notable linear trend, whereas the relationship between FGP and MGT with GA3 concentrations showed a significant quadratic pattern. This suggests that GA3 concentrations can effectively promote seedling growth. The substrate choice notably influenced FGP and MGT due to its role in nutrient provision and aeration. The highest GA3 concentration led to the greatest enhancement in seedling vegetative growth, implying that prolonged usage might yield further benefits over time. In conclusion, the findings suggest that both GA3 and substrate have the potential to enhance Chilgoza seed germination and subsequent seedling growth, and their combined application could be a beneficial approach.

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Section: Discussionmentioning

confidence: 99%

Sowing Media and Gibberellic Acid Influences Germination and Seedling Growth of Chilgoza Pine (Pinus gerardiana. Wall)

Salari,

Kumar,

Wani

et al. 2023

IJPSS

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“…However, the treatment with GA3 resulted in a higher number of normal seedlings for promoting cell elongation, which contributes for the seed germination of this species. Treatment with GA contributes to the biosynthesis of the amylase that acts in the starch hydrolysis, being converted into soluble sugars and favoring seedlings formation (BEWLEY et al, 2013;GARCIA et al, 2021).…”

Section: Discussion Experimentsmentioning

confidence: 99%

Dormancy overcoming in seeds of Myrciaria glomerata O. Berg.

Santos

Pinto

et al. 2022

Rev. Bras. Frutic.

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Myrciaria glomerata O. Berg. (Myrtaceae) is a fruit tree native to the Brazilian Atlantic Forest with potential for use as food and medicine, besides having good ecological potential. However, this species is limited by low germination rates. Thus, this study aimed to evaluate different methods to overcome dormancy in seeds of M. glomerata and to improve seedling vigor. For this, two experiments were conducted. In Experiment 1, seven treatments were tested: a control treatment, immersion in water at 100 ºC for 30 seconds, immersion in concentrated sulfuric acid (H2SO4) for 1 and 5 minutes, immersion in an aqueous solution of gibberellic acid (GA3) at the concentrations of 250 and 500 mg L-1 for 24 h, and seeds homogenized with an aqueous solution of Stimulate® at a concentration of 5 mL kg-1 seed. In Experiment 2, six doses of Stimulate® were tested: 0, 5, 10, 15, 20, 25, and 30 mL kg-1 seed. The immersion of seeds in 250 and 500 mg L-1 GA3 contributes to increase germination rates, seed length, fresh mass, and dry mass compared to the control and the other methods tested. Immersions in water at 100 ºC and in H2SO4 are not recommended for M. glomerata. The treatment with Stimulate® at 15–25 mL kg-1 seed increased all characteristics analyzed. Immersion in 250 mg L-1 GA3 and Stimu-late® at 20–25 mL kg-1 seed efficiently stimulated seeds to overcome dormancy in M. glomerata, as well as improved seedling vigor.

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Gibberellic acid promotes dormancy-breaking of rice seeds and the formation of abnormal seedlings

Cited by 2 publications

References 23 publications

Sowing Media and Gibberellic Acid Influences Germination and Seedling Growth of Chilgoza Pine (Pinus gerardiana. Wall)

Sowing Media and Gibberellic Acid Influences Germination and Seedling Growth of Chilgoza Pine (Pinus gerardiana. Wall)

Dormancy overcoming in seeds of Myrciaria glomerata O. Berg.

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