Overcoming seed dormancy using gibberellic acid and the performance of young Syagrus coronata plants under severe drought stress and recovery

Medeiros, Maria das Graças Freire de; Oliveira, Marciel T.; Willadino, Lília; Santos, Mariana

doi:10.1016/j.plaphy.2015.10.008

Cited by 8 publications

(4 citation statements)

References 41 publications

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“…For S. coronata, Carvalho et al (2005) did not report any positive effect on germination after removing the seed endocarp, however, the germination rate was higher when they were soaked in solutions with gibberellic acid (GA 3 ). This effect was also observed by Medeiros et al (2015a), and Medeiros et al (2015b). Despite some studies for this species, the use of these methods together can result in the reduction of the time and standardization of the seedlings produced, which will contribute to the inclusion of this potentially productive species into programs of plant production and improvement.…”

Section: Introductionsupporting

confidence: 61%

“…However, the 12-hour period soaked in a GA 3 solution at 1,000 mg L -1 doubled the percentage of germination, when compared to seeds soaked in solutions without the regulator. Medeiros et al (2015b) noticed, for the same species, a positive influence of the use of regulators when the seeds were soaked for 24 hours into 0.3 nM of GA 3 . Temperatures that favor seed germination vary according to the species.…”

Section: Resultsmentioning

confidence: 81%

See 1 more Smart Citation

Pre-germination Treatments, Quality of Light and Temperature on Syagrus coronata (Mart.) Becc. Seeds Germination

Porto¹,

Oliveira²,

Souza³

et al. 2018

JAS

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Studies show that most species of palm trees present seed dormancy. This characteristic hinders the production of seedlings, due to the long period for germination and the unevenness of the seedlings. The specie Syagrus coronata, despite being widely used as food and economic resources, presents also seed dormancy, which hinders its propagation. Thus, this work aimed at evaluating the germination of S. coronata seeds using different methods of dormancy breaking and also, under different qualities of light and temperature. To do so, the seed endocarps were scarified by friction, puncture and complete removal of the endocarp, and the pre-soaking of seeds at different concentrations (50, 100, 200 and 400 mg L-1) of gibberellic acid (GA3) and indolebutyric acid (IBA). We also evaluated the effect of germination in seeds exposed to different conditions of light (white, red, far red, blue and dark) and to different temperatures (25, 30, 35 and 20-30 °C). The data show that the act of rubbing the endocarp optimizes the seed germination process. Solutions containing growth regulators in the pre-soaking of seeds have a negative impact on germination. And the absence of light and the constant temperature of 25 °C are the most suitable for germination. The results indicate that S. coronata seeds have physical dormancy, and, despite obtaining greater germination in the dark, they are neutral photoblastic.

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Section: Introductionsupporting

confidence: 61%

Section: Resultsmentioning

confidence: 81%

Pre-germination Treatments, Quality of Light and Temperature on Syagrus coronata (Mart.) Becc. Seeds Germination

Porto¹,

Oliveira²,

Souza³

et al. 2018

JAS

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show abstract

“…E, embryo; End/Cot, endosperm/cotyledon; SC, seed coat (Souza Dias et al 2018), or mesocarp, i.e., pulp, e.g., Syagrus coronata Becc. (Medeiros et al 2015). In M. flexuosa, dormancy break was reported to occur after removing the operculum (manually), which immediately triggered germination (Moura et al 2019).…”

Section: Physicalmentioning

confidence: 99%

“…1) arising from the combination of impermeable seed coat and physiological dormancy of the embryo, i.e., physical dormancy + physiological dormancy, is absent in palms (e.g., Carvalho et al 2015). However, many recent studies still conclude that palm diaspores have physiological dormancy or use terms such as embryonic dormancy (Nazário et al 2017), physiological and physical dormancy (Medeiros et al 2015), and even in some cases the seeds are reported to be dormant due to constraint resulting from the operculum (Moura et al 2019). Further, there is disagreement as to whether morphological dormancy should be considered as a form of dormancy or be reclassified as an absence of actual dormancy (Mazzottini-dos-Santos et al 2018;Visscher et al 2020).…”

mentioning

confidence: 99%

Defining correct dormancy class matters: morphological and morphophysiological dormancy in Arecaceae

Jaganathan

2020

Annals of Forest Science

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& Key message Dormancy in Arecaceae diaspores is due to underdeveloped embryos, therefore, morphological dormancy or morphophysiological dormancy. Consequently, claims such as external seed structures inhibit germination, embryos are fully developed at maturity, and underdeveloped embryo is not a form of dormancy are rejected, because embryo size of the diaspore at the time of dispersal was not taken into consideration. The re-classification proposal for moving morphological dormancy into non-dormancy is also discouraged. This is owing to the fact that when both morphological dormancy and non-dormant seeds are placed under conditions suitable for germination, those with morphological dormancy do not germinate immediately due to time needed for growth of the embryo, whereas non-dormant seeds can germinate quickly. The implications of correctly defining dormancy class are important, for researchers working with seeds at various levels from forestry to molecular biology.

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Seed Dormancy

Siraree¹,

Misra²

2020

Advances in Seed Production and Management

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Overcoming seed dormancy using gibberellic acid and the performance of young Syagrus coronata plants under severe drought stress and recovery

Cited by 8 publications

References 41 publications

Pre-germination Treatments, Quality of Light and Temperature on Syagrus coronata (Mart.) Becc. Seeds Germination

Pre-germination Treatments, Quality of Light and Temperature on Syagrus coronata (Mart.) Becc. Seeds Germination

Defining correct dormancy class matters: morphological and morphophysiological dormancy in Arecaceae

Seed Dormancy

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