Germinação de sementes e emergência de plântulas de jutaí (Hymenaea parvifolia Huber.)

Silva, B.M.S.; Cesarino, Fabiano

doi:10.1590/1983-084x/15_178

Cited by 8 publications

(6 citation statements)

References 13 publications

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“…These results are in agreement with Silva and Cesarino (2016) who observed that the number of leaves, height and length of roots of Jutaí seedlings decreased linearly with the sowing depth increase.…”

Section: Controlled Environmentsupporting

confidence: 93%

Sowing Depth on Emergence of Different Safflower Genotypes (Carthamus tinctorius L.)

Lenz¹,

Santos²,

Lenz³

et al. 2017

JAS

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The objective is to evaluate the germination of four different safflower genotypes at six sowing depths. The study was carried out in the experimental field of the Western Paraná State University, in Cascavel, in two stages: in protected environment and in the field. In a protected environment, the experimental units were vessels with a 0.10 m diameter and a 0.20 m height, maintaining a 0.05 m water level. Using 10 seeds per vase, filled with substrate composed of vermiculite and macronutrients. For the field, the experimental units were divided in 3 blocks with 1.50 m rows, with 30 seeds spaced in 0.05 m, spacing between 0.30 m rows, totalizing blocks of 6 m by 1.8 m. For the analysis, we performed a 5 × 4 factorial, with four replicates being 5 depths (0.02; 0.04; 0.06; 0.08 and 0.10 m) and 4 genotypes, with analysis of percentage, speed index, mean time and average speed of emergence and morphometric characteristics of the plant. High emergence rates occurred for the lowest sowing depths, ranging from 60 to 80%. At the greatest depths, the averages were below 50%. At 0 m depth, there was no emergence for both sites. For the emergence speed index, the averages ranged from 0.47 to 1.34 seeds per day for the protected environment and 2.26 to 16.42 seeds per day for the field experiment. For both sites, the IMA-2103 genotype had the best performance for the evaluated indices. The depths indicated for planting are 2 and 4 cm.

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Section: Controlled Environmentsupporting

confidence: 93%

Sowing Depth on Emergence of Different Safflower Genotypes (Carthamus tinctorius L.)

Lenz¹,

Santos²,

Lenz³

et al. 2017

JAS

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“…This process allowed the entry of water and oxygen, in addition to favoring the action of hydrolytic enzymes that act with the activation of protein synthesis, enabling the mobilization of reserves from the germination process, as seen by Santos et al (2019), who obtained 93% seed germination from H. courbaril when subjected to mechanical scarification. This was also seen by other authors, such as Coelho and Ribeiro (2018), above 93%, Cabral, Castilho and Pagliarini (2015), above 86%, Sampaio et al (2015), with 84%, Souza et al (2015), above 80%, and by Silva and Cesarino (2016) with 69.2%. * Means followed by letters of the same lowercase letter horizontally and uppercase vertically do not differ, according to the Tukey test at 5%.…”

Section: Resultssupporting

confidence: 75%

Germination potential of Hymenaea courbaril L. in different maturation stages

Guariz¹,

Oliveira²,

Sperandio³

et al. 2021

Semina: Ciênc. Agrár.

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The production of quality forest seedlings in large quantities is essential for the restoration of environments that have been deforested and degraded. However, obtaining seeds with high vigor is a challenge for several tree species native to Brazil. The objective of this work was to verify the germination potential of jatobá-da-mata seeds at different stages of maturation, in order to favor the production of seedlings of this species in nurseries. The seeds were extracted from green and ripe fruits detached from the mother plant and ripe fruits collected from the ground. The germination percentage, average germination time, emergence speed index, average speed, relative frequency, leaf area of the seedling, and length of the aerial part and root were measured. The planting was carried out with mechanically scarified and intact seeds from each maturation group. The results indicated that non-scarified green seeds can be used for planting and seedling production, as they do not require pre-germination treatment and have a favorable germination percentage (79%). Fruit seeds harvested from the ground, on the other hand, needed a method to overcome integumentary dormancy, such as mechanical scarification, obtaining a germination rate of 85%. The seeds of ripe fruits harvested in the matrix showed greater vigor, with a higher percentage of germination (96 to 100%), a higher emergence speed index, shorter average germination time, and seedlings with greater leaf area and greater length of shoot.

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“…It is known that the success in seed emergence is related not only to intrinsic factors, but also to the set of extrinsic and intrinsic factors acting concomitantly. This fact can be corroborated by the study done by Silva and Cesarino (2016), in which the authors studied the influence of different temperatures on the emergence of 'Jutaí' seeds (Hymenae aparvifolia Huber. ), obtaining different percentages and speed of emergence.…”

Section: Resultsmentioning

confidence: 65%

Emergence Rate and Initial Growth of Longan (Dimocarpus longan Lour) in Relation to Seeds Sizes

Silva¹,

Ramos²,

Laredo³

et al. 2019

JAS

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The fruit plant ‘Longan’ is considered as being native to Asia and is at present commercially explored in some regions. The objective of this work was to study the influence of seed size on seed emergence and initial seedling growth. The experiment was carried out using a randomized block design (DBC), with three treatments, namely, the seed sizes at seedling emergence according to their longitudinal diameter: small, medium and large. Each plot was composed of six seeds and five replications per treatment. The following characteristics were evaluated: emergence speed index, average time, percentage and relative frequency of emergence, leaf number, stem diameter, plant height, shoot dry mass and root dry mass. Seeds of medium and large size are those that presented satisfactory results for the characteristics related to seed emergence. The same ones stood out in relation to the small seeds for the variables percentage, average time, average speed and emergence speed index. Small seeds are not recommended for the production of ‘Longan’ seedlings, given the long period of time to emerge and the low probability of the seedlings establishing satisfactorily in the field. The medium and large seeds were the most promising for the variables number of leaves, stem diameter, plant height, dry shoot mass and dry root mass.Therefore, according to the conditions in which the present work was conducted, the use of medium and large seeds for the production of ‘Longan’ seedlings is suggested.

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Germinação de sementes e emergência de plântulas de jutaí (Hymenaea parvifolia Huber.)

Cited by 8 publications

References 13 publications

Sowing Depth on Emergence of Different Safflower Genotypes (Carthamus tinctorius L.)

Sowing Depth on Emergence of Different Safflower Genotypes (Carthamus tinctorius L.)

Germination potential of Hymenaea courbaril L. in different maturation stages

Emergence Rate and Initial Growth of Longan (Dimocarpus longan Lour) in Relation to Seeds Sizes

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