Physical and physiological quality of mangaba seeds obtained by different processing methods

Nunes, Valdinete Vieira; Silva-Mann, Renata; Vasconcelos, Maria Viviane Lisboa de; Rodrigues, Allana Mellyse Barbosa; Souza, Juliana Lopes

doi:10.1590/1807-1929/agriambi.v25n6p429-435

Cited by 5 publications

(6 citation statements)

References 23 publications

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“…There was a wide difference in germination between the two lots. The summer lot had an 80% germination rate of freshly harvested seeds, similar to other studies (Barros et al 2011;Oliveira et al 2018;Nunes et al 2021). The summer harvest is the main production period of the species when trees produce more and larger fruits (Silva-Júnior and Lédo;Coradin et al 2018).…”

Section: Resultssupporting

confidence: 85%

“…Ripe fruits of H. speciosa, characterized by green to yellow exocarp with red spots of pigmentation (Pereira et al 2016;Coradin et al 2018), were manually processed to obtain seeds within each lot (Nunes et al 2021), collected at natural populations explored by the traditional community 'Catadoras de Mangaba' in the state of Sergipe (Sergipe 2010).…”

Section: Methodsmentioning

confidence: 99%

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Overcoming Hancornia speciosa seed recalcitrance: harvest season and storage time

Souza

Nunes

Freitas

et al. 2022

Preprint

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Storage of desiccation-tolerant seeds is one of the most effective germplasm conservation strategies; however, several species of tropical and subtropical humid forests have seeds that are sensitive to desiccation, and recalcitrant seeds, making conservation a challenge. Recalcitrant seeds deteriorate during storage due to high respiration rates and metabolic activity, and protocols employing osmoprotective solutions aim to minimize those effects to maintain seed viability for a more extended period. Hancornia speciosa, a fruit tree considered a priority for research in Brazil, is a desiccation-sensitive species. Thus, this study aimed to assess the physiological parameters of viability, vigor, and enzymatic activity of H. speciosa seeds stored in an osmoprotective solution. Germination percentage, water content, electrical conductivity, shoot, root, seedling length, peroxidase activity, and heat-resistant protein concentration were determined for seeds collected during summer and winter harvests. In addition, gene sequences were explored through gene ontology using Blast analysis to identify the biological and molecular processes associated with enzymatic action during storage. Summer-collected seeds performed better in viability and vigor and are recommended for storage in the osmoprotective solution. After being stored in the solution, seeds collected in the winter improved germination and vigor. H. speciosa seeds harvested in the summer or winter and stored in the osmoprotective solution remain viable for up to 90 days. Peroxidase and heat-resistant proteins are active; these enzymes' expression regulation should be investigated in future studies.

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Section: Resultssupporting

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Overcoming Hancornia speciosa seed recalcitrance: harvest season and storage time

Souza

Nunes

Freitas

et al. 2022

Preprint

Self Cite

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“…The seeds were manually processed from ripe fruits (Nunes et al, 2021a), which correspond to yellowish to reddish skin, reddish streaks, and a soft texture. Obtained from a natural population in an area identified in previous studies as genetically diverse and used by the Catadoras de Mangaba community (Nunes et al, 2021b).…”

Section: Methodsmentioning

confidence: 99%

Physiological and molecular changes in seeds of Hancornia speciosa Gomes stored in conservative solutions

Nunes,

Silva-Mann,

Souza

et al. 2022

J. Seed Sci.

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For native species in Brazil, there is a great need for scientific information that allows efficient production and storage of seeds. The present work evaluated the physiological and molecular changes in Hancornia speciosa seeds stored in conservative solutions. The experiment was carried out in a completely randomized design, in a split-plot scheme, with eight replications. In the plots, the conservative solutions (A, B, C, and D) were allocated, and the subplots the storage periods (50, 100, 150, and 200 days). The following variables were analyzed: water content, X-ray, germination, shoot length, root, dry mass of seedlings, electrical conductivity, concentration and quality of ribonucleic acid, the concentration of peroxidase, and heat-resistant proteins. The water content remained above 50%, and 88% of the seeds are full and well-formed. There is a reduction in the germination, shoot length, root, and dry mass of seedlings; and an increase of electrical conductivity with the increase of the storage time. Heat-resistant proteins were not sufficient to protect seeds against macromolecular damage, and RNA and peroxidase concentrations decreased with the increase of the storage time. The seeds stored in solutions B and C are more vigorous, being such solutions indicated for the conservation of H. speciosa.

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“…In general, it appears that the effect of saline stress had a greater effect on the GSI than on total germination, which shows that GSI is one of the main parameters that should be evaluated in germination tests. According to Nunes et al (2021), a seed that germinates faster has greater vigor. Lennon et al ( 2021) reinforced these genotypes with rapid germination, using this potential as a strategy to establish themselves in the environment as quickly as possible or when appropriate, taking advantage of environmental conditions favorable to the development of the new individual.…”

Section: Resultsmentioning

confidence: 99%

Germination and vigor of soybean genotypes seeds under saline stress

Alves

Lins

Albuquerque

et al. 2022

Rev. bras. eng. agríc. ambient.

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Soybean stands out among the crops with the greatest application of transgenics, mainly for tolerance to herbicides, pests, and diseases; however, studies on salt stress in genetically modified plants are scarce. This study aimed to evaluate the tolerance of both traditional and genetically modified soybean genotypes to saline stress during the germination and seedling phases. Seeds of 13 soybean genotypes were selected (five traditional (BRS Carnaúba, BRS Pérola, BRS Tracajá, BRS Sambaíba, and FTR-4389) and eight transgenic (BRS Sambaíba RR, BRS-333-RR, BRS-9820- RR, PAS-13565-74-RR, PAS-11711-007-RR, BRS-918-IPRO, AS-3810-IPRO, and M-8210-IPRO)), subjected to four osmotic potentials (0.0, 0.1, -0.2, and -0.3 MPa). The seed quality was evaluated using the following variables: the germination percentage, germination speed index, shoot length, root length, dry mass accumulation, and salinity tolerance index. All variables were found to be affected by salt stress. However, the conventional genotypes, BRS Carnaúba, BRS Pérola, BRS Tracajá, and BRS Sambaíba, and the RR group PAS-13565-74-RR, and PAS-11711-007-RR were tolerant to salinity, whereas the genotypes FTR-4389 (conventional) and BRS Sambaíba RR (RR) were less tolerant to salt stress, and all genotypes in the IPRO group were moderately tolerant to salt stress.

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Physical and physiological quality of mangaba seeds obtained by different processing methods

Cited by 5 publications

References 23 publications

Overcoming Hancornia speciosa seed recalcitrance: harvest season and storage time

Overcoming Hancornia speciosa seed recalcitrance: harvest season and storage time

Physiological and molecular changes in seeds of Hancornia speciosa Gomes stored in conservative solutions

Germination and vigor of soybean genotypes seeds under saline stress

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