Plant Growth Regulators on Atemoya Seeds Germination

Carvalho, Deived Uilian de; Cruz, Maria Aparecida da; Osipi, Elisete Aparecida Fernandes; Cossa, Conceição Aparecida; Colombo, Ronan Carlos; Sorace, Maria Aparecida Fonseca

doi:10.3738/1982.2278.2832

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…In regards to the tested temperatures, seeds germination period for the three cultivars occurred mainly from day 7 to day 28, concentrated between the 7th and the 14th day (Figure 2). These results corroborate those found by Stenzel et al (2003) and Carvalho et al (2018b), who obtained, for the same genotypes evaluated, greater percentiles of germination between days 7 and 14.…”

Section: Resultssupporting

confidence: 92%

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Temperature on Annona cherimola Mill. x Annona squamosa L. seed germination

Carvalho

Cruz

Osipi

et al. 2019

ASB J.

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In the production of atemoya rootstocks (Annona cherimola Mill. x Annona squamosa L.), the seed propagation is hindered by dormancy resulting in low germination, similar to temperature that affects the percentage, speed, and uniformity of germination. This study aimed to evaluate the effect of constant and alternating temperature on the seed germination of three atemoya genotypes: ‘Gefner’, ‘Thompson’ and ‘PR-1’ at 25°C and 20-30°C (8-16h) using germination paper in absence of light, with four samples of 25 seeds per treatment. The evaluations occurred each seven days up to 35 days, which were assessed: germinated seeds, seedlings, dormant seeds and germination speed index. The experimental design was completely randomized in a factorial arrangement of 3x2, using four replications. The water content, fresh and dry matter of 100 seeds were analyzed in a completely randomized scheme with four replications. The alternating temperature 20-30°C provided favorable condition and higher germination percentage for atemoya seeds, achieving 0.638 for germination speed index and 37% for percentage of germination at 35 days. ‘Gefner’ and ‘Thompson’ cultivars presented higher percentage of germination than ‘PR-1’.

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Section: Resultssupporting

confidence: 92%

“…On the other hand, the 'PR-1' atemoya resulted in lower percentiles of germinated seeds compared to the others genotypes during the evaluation at day 21. These values are similar to those found by Carvalho et al (2018b) for the evaluation of the same atemoya genotypes submitted to treatments with phytoregulators.…”

Section: Cultivarssupporting

confidence: 89%

Temperature on Annona cherimola Mill. x Annona squamosa L. seed germination

Carvalho

Cruz

Osipi

et al. 2019

ASB J.

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“…In this context, the results obtained in this work support what has been developed with the genus Annona in relation to the amount of seeds per sampling unit used in germination tests, such as Carvalho et al (2018), who used 25 Annona × atemoya seeds, Mendonça et al (2007) 15 Annona muricata L. seeds and Oliveira and Andrade (2005) 10 Annona montana seeds per sampling unit. In the same way, the number of replicates, since the bootstrap simulation technique is not a statistical analysis but rather an empirical method, allows us inferring that the number of replicates does not influence the accumulated germination percentage, which could be from 3 replicates, which already obtains maximum accumulated germination percentage.…”

Section: Discussionsupporting

confidence: 84%

“…Its seeds, as well as the seeds of other Annonaceae, have been studied in several aspects, both from the technological point of view, for the production of seedlings and for the understanding of physiological processes, such as dormancy (Ferreira et al, 2016;Carvalho et al, 2018), desiccation tolerance (Corsato et al, 2013) and synthesis of specialized metabolites during germination (De La Cruz & González-Esquinca, 2012). However, for germination tests, there is no standardization in relation to the number of seeds per sampling unit and number of replicates used: Carvalho et al (2018) used 5 replicates of 25 seeds in Annona × atemoya (cv Thompson and Gefner), Menegazzo et al (2012) performed tests with 4 replicates of 20 seeds of A. squamosa. A smaller number of seeds were observed in the studies of Oliveira and Andrade (2005), who used only four replicates and 10 seeds of Annona montana.…”

Section: Introductionmentioning

confidence: 99%

Optimum Sample Size in the Germination of Atemoya Seeds (Annona× atemoya Mabb.)

Gomes¹,

Passos²,

Gimenez³

et al. 2019

JAS

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Atemoya currently has its seeds studied in several aspects, from the technological and physiological point of view. However, for the performance of the germination test, there is no standardization in relation to the number of seeds and replicates. Thus, this work aims to determine the optimal sample size for germination tests with atemoya seeds. A germination test was carried out with 5 treatments, considering 10, 20, 30 40 and 50 seeds per sampling unit with 50 replicates of each. Data were analyzed using logistic regression, non-linear Gompertz regression models, bootstrap simulation and graphs in the form of contour lines in order to be able to infer the best binomial of the number of seeds per sampling unit and the number of replicates. The expected germination percentage, maximum germination speed and times for the beginning of the germination process, maximum germination speed and interruption of the germination process were determined. The treatment of 20 seeds per sampling unit statistically differs from that of 40 seeds by the Tukey-Kramer test with 5% significance. It could be concluded that for germination tests with atemoya seeds to have statistical validity, the smallest sample size is 10 seeds per unit, regardless of number of replicates.

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“…For example, Lobo et al (2007) evaluated hot and cold stratification and the application of gibberellic acid to break the morphophysiological dormancy in A. cherimola and A. muricata. Martínez et al (2016) obtained positive results by applying gibberellic acid to reduce morphophysiological dormancy in A. squamosa seeds, by same as Da Silva et al (2007) in seeds of A. crassiflora and Carvalho et al (2018) in A. cherimola Mill. x A. squamosa L. On the other hand, Ledo and Cabanelas (1997) found good results with mechanical scarification in seeds of A. muricata, as well as Adeniji et al (2014) with A. squamosa to break non-deep physiological dormancy (Baskin and Baskin, 2004).…”

Section: Introductionmentioning

confidence: 74%

Germination Capacity of Annona deceptrix (Westra) H. Rainer (Annonaceae) an Endemic and Endangered Species in Manabí, Ecuador

Pico-Mendoza

Pinoargote

Madrid

et al. 2020

IJARe

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Annona deceptrix is an endemic and endangered tree from Ecuador according to the IUCN Red List of Endangered Species™. Its endangered status has been related with anthropogenic activities and some intrinsic characteristics of this species such as a low germination capacity of its seeds under natural conditions which is a serious limitation to obtain plants to establish conservation and breeding strategies. The objective of this study was to determine the seed germination capacity of A. deceptrix under different conditions and pre-germination treatments as a decisive factor in the survival of the species in ecosystems. The six pre-germination treatments were seed mechanical scarification (fine sandpaper), seed imbibitions in gibberellic acid solutions with three different concentrations (600, 700, 800 ppm) for 24 hours, imbibition of seeds in distilled water for 48 hours and direct sowing (control). For each treatment was sown twenty seeds under greenhouse conditions and germination chamber. The variables evaluated were: total number of germinated seeds, germination capacity, maximum germination value and germination energy. Mechanical scarification was the best treatment with 100 % germinated seed and showed to be significantly different than the other treatment. In this regards, the rest of the treatment the germination ranged between 35 % to 55 % and did not show statistical differences each other. In conclusion, the seeds of A. deceptrix have a low germination capacity in natural conditions and then they need a pre-germination process such as mechanical-scarification to guarantees for their performance in the ecosystems.

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Plant Growth Regulators on Atemoya Seeds Germination

Cited by 4 publications

References 6 publications

Temperature on Annona cherimola Mill. x Annona squamosa L. seed germination

Temperature on Annona cherimola Mill. x Annona squamosa L. seed germination

Optimum Sample Size in the Germination of Atemoya Seeds (Annona× atemoya Mabb.)

Germination Capacity of Annona deceptrix (Westra) H. Rainer (Annonaceae) an Endemic and Endangered Species in Manabí, Ecuador

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