FISIOLOGIA DA GERMINAÇÃO DE SEMENTES DE Dalbergia nigra(Vell.) Allemão ex Benth. SOB DIFERENTES TEMPERATURAS E TEMPOS DE EXPOSIÇÃO

Matos, Antônio César Batista; Borges, Eduardo Euclydes de Lima e; Silva, Laércio Junio da

doi:10.1590/0100-67622015000100011

Cited by 17 publications

(15 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar results have also been reported for SOD activity in Medicago sativa seeds, which showed constant behavior at 22 • C [48]. During the soaking of Dalbergia nigra seeds, SOD activity is higher at 45 • C than at 25 • C [18]. Nevertheless, Kumar et al [49] observed an increase in SOD activity until 40 • C in maize and rice genotypes, followed by a decrease after 45 • C. Although the production of SOD is one of the first responses to abiotic stress, the action of this enzyme must not be evaluated individually, since APX and/or CAT, for instance, eliminate H 2 O 2 , which permeates the membrane easily and is toxic to cells [50].…”

Section: Discussionsupporting

confidence: 87%

“…The increased concentration of this molecule might lead to the occurrence of lipid peroxidation and to an ulterior disruption of the cell membrane, as indicated by the increased leakage at 45 • C, which caused a gradual decrease in seed viability. Similar results were found in Dalbergia nigra seeds, which showed a gradual loss in viability at 45 • C [18]. With increasing stress, the formation of ROS is intensified, and their elimination must be constant to avoid oxidative stress.…”

Section: Discussionsupporting

confidence: 80%

See 1 more Smart Citation

Germination of Seeds of Melanoxylon brauna Schott. under Heat Stress: Production of Reactive Oxygen Species and Antioxidant Activity

Santos

Borges

Ataíde

et al. 2017

Forests

View full text Add to dashboard Cite

Abstract:In this article, the authors aimed to analyze the physiological and biochemical alterations in Melanoxylon brauna seeds subjected to heat stress. For this, seed germination, electric conductivity (EC), the production of reactive oxygen species (ROS), and the activity of antioxidant enzymes were assessed. Seeds were incubated at constant temperatures of 25, 35, and 45 • C. Independent samples were first incubated at 35 and 45 • C and then transferred to 25 • C after the intervals of 24, 48, 72, and 96 h. To evaluate EC, seeds were soaked for 0, 24, 48, and 72 h, at 25, 35, and 45 • C and then transferred to Erlenmeyer flasks containing 75 mL of deionized water at 25 • C, for 24 h. ROS production and enzyme activity were assessed every 24 h in seeds soaked at the aforementioned temperatures. Germination did not occur at 45 • C. Seeds soaked at 35 • C for 72 h and then transferred to 25 • C showed higher percentages of germination and a higher germination speed. Seed soaking at 45 • C increased peroxide production, which compromised the antioxidant enzyme system due to a reduction in the activity of enzymes APX, POX, and CAT, thus ultimately also compromising the cell membrane system.

show abstract

Section: Discussionsupporting

confidence: 87%

Section: Discussionsupporting

confidence: 80%

Germination of Seeds of Melanoxylon brauna Schott. under Heat Stress: Production of Reactive Oxygen Species and Antioxidant Activity

Santos

Borges

Ataíde

et al. 2017

Forests

View full text Add to dashboard Cite

show abstract

“…The germination speed index (GSI) is a vigor indicator of the seeds and of the germinating potential under adverse conditions (Matos et al, 2015). A positive and highly significant correlation between the seed mass and GSI (r p =0.93 and p-value=0.001) was found in the eight peach rootstocks evaluated.…”

Section: Germination Potential Of Seeds Without Endocarpsmentioning

confidence: 97%

Optimization of germination and initial quality of seedlings of Prunus persica tree rootstocks

et al. 2017

View full text Add to dashboard Cite

-The present study evaluated the germination potential of seeds from eight peach tree rootstocks under different stratification methods, aiming at the production of high quality seedlings. In the first experiment, seeds with endocarp from eight genotypes ('Aldrighi', 'Capdeboscq', 'Flordaguard', 'Okinawa', 'Okinawa roxo', 'Tsukuba 1', 'Tsukuba 2', 'Tsukuba 3') were stratified on sand and moist vermiculite, at 7 ºC for 60 days. In the second experiment, endocarpless seeds of the same genotypes were stratified on Petri dishes at 7 ºC. In the third experiment, the time at which at least 75% of the seedlings reached transplanting height (15 cm high) was verified. The endocarp was a limiting factor for seed germination of the eight rootstocks, since the highest germination percentages were 21% and 48.3% for 'Aldrighi' and 'Capdeboscq', respectively. Germination of 'Okinawa' was only 19.2% and 4.2%, in sand and vermiculite, respectively. Seeds stratified without the endocarp, showed 100% germination, except for 'Flordaguard' and 'Tsukuba 2' and 3', with 93% germination. Seed mass presented a positive correlation with the germination speed index and the initial growth of the seedlings. 'Aldrighi' and 'Capdeboscq' presented more vigorous seedlings with greater growth in height, stem diameter, and Dickson quality index.

show abstract

“…Due to difficulties found concerning germination among forest species, alternative tests, like water imbibition curve and electrical conductivity tests under controlled conditions are being applied in many laboratories with the objective of defining seed vigor and viability. The fastness in obtaining reliable results is one of the main aspects considered in the evaluation of seed quality, for it allows agility in decision making, enables its use in wider scales, decreasing the risks and costs in operations like harvest, processing, storage and commercialization (Barbieri, Menezes, Conceição, & Tunes, 2012;Hilst, Dias, Alvarenga, & Souza, 2012;Matos, Borges, & Silva, 2015).…”

mentioning

confidence: 99%

Water absorption and improvement of methods for electrical conductivity test in acacia seeds

Oliveira

Smiderle

Paulino

et al. 2016

RBT

View full text Add to dashboard Cite

Abstract:Acacia is an important forest species of rapid growth whose seeds have tegument dormancy. In this work it was intended to characterize water absorption pattern after seed dormancy break, and to determine the amount of water, container size and the need of breaking the tegument dormancy, as to perform electrical conductivity test in small and large seeds of Acacia mangium (Fabaceae). The seeds were collected from 10, 8 and 6 years old trees established in poor yielding-capacity soils on savannah areas of Roraima, Brazil; seeds were classified in six lots concerning to seed size and tree age. Germination tests (50 seeds and four replications per lot) were carried out on germitest® paper maintained on gerbox at 25 °C. Imbibition was verified by seed weighing at different times (0, 2, 5, 8, 12, 16, 24, 36, 48, 60, 72, 84, 96 and 120 hours). The electrical conductivity test consisted of three experiments, distinguished by the amount of water used and by the container size in which seeds were immersed. Seeds of A. mangium coming from 10 years old trees presented increased germination percent and germination speed than seeds of six-year old trees. Small seeds presented increased in electrical conductivity and water absorption until 120 hours when compared to large seeds. The immersion of seeds of A. mangium in 40 mL of distilled water into 180 mL plastic containers, after dormancy break, it is indicated for the determination of electrical conductivity test. The ratio of electrolytes by seed mass, after 24 hours of immersion in water, turns electrical conductivity test more accurate concerning A. mangium seeds. Rev. Biol. Trop. 64 (4): 1651-1660. Epub 2016 December 01.

show abstract

FISIOLOGIA DA GERMINAÇÃO DE SEMENTES DE Dalbergia nigra(Vell.) Allemão ex Benth. SOB DIFERENTES TEMPERATURAS E TEMPOS DE EXPOSIÇÃO

Cited by 17 publications

References 29 publications

Germination of Seeds of Melanoxylon brauna Schott. under Heat Stress: Production of Reactive Oxygen Species and Antioxidant Activity

Germination of Seeds of Melanoxylon brauna Schott. under Heat Stress: Production of Reactive Oxygen Species and Antioxidant Activity

Optimization of germination and initial quality of seedlings of Prunus persica tree rootstocks

Water absorption and improvement of methods for electrical conductivity test in acacia seeds

Contact Info

Product

Resources

About