Water stress on germination and vigor of ‘mofumbo’ (Combretum leprosum Mart.) seeds
            at different temperatures

Leal, Caio César Pereira; Torres, Salvador Barros; Dantas, Nadjamara Bandeira de Lima; Aquino, Gutierres Silva Medeiros; Alves, Tatianne Raianne Costa

doi:10.5935/1806-6690.20200013

Cited by 10 publications

(10 citation statements)

References 2 publications

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“…The reduction in germination and seed vigor was reported by other authors, such as Leal [4] that who observed that Combretum leprosum Mart. seeds did not germinate when subjected to the osmotic potential of -0.5 MPa at a temperature of 35 ºC.…”

Section: Discussionsupporting

confidence: 68%

“…However, its exploration in semi-arid regions can be compromised by low rainfall, water scarcity and high temperatures, especially in the germination and initial seedling establishment phases [4]. Drought stress promotes a series of changes in germination, affecting the imbibition of embryonic tissue, respiratory activity, degradation and mobilization of reserves, losses in membrane functionality and cellular activity [5].…”

Section: Highlightsmentioning

confidence: 99%

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Physiological Response of Seeds of Crotalaria spectabilis under Drought and Heat Stress

Nóbrega

Silva

Bezerra

et al. 2022

Braz. arch. biol. technol.

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This study evaluate the effect of drought and heat stress on the quality of C. spectabilis seeds. A completely randomized design in a 4×4 factorial scheme, referring to four osmotic potentials based on Polyethylene glycol (PEG 6000 = 0.0, -0.2, -0.4 and -0.8 MPa) and four temperatures (25, 30 and 35 ºC constant and alternating between 25-35 ºC), with four replications of 50 seeds per plot was used. The germination percentage, first count germination, germination speed index, average germination time, average germination speed, length and dry mass of the root, shoot and seedlings were evaluated. C. spectabilis is sensitive to drought stress during germination and seedling establishment, tolerating up to -0.2 MPa. The physiological quality of seeds is reduced with the decrease of osmotic potentials. The temperature range between 25 and 30 ºC are the one that provide better conditions for the germination of the seeds of this species.

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Section: Discussionsupporting

confidence: 68%

Section: Highlightsmentioning

confidence: 99%

Physiological Response of Seeds of Crotalaria spectabilis under Drought and Heat Stress

Nóbrega

Silva

Bezerra

et al. 2022

Braz. arch. biol. technol.

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“…A reduction in the GSI under saline stress in association with an osmotic potential ranging from 0.0 MPa to 1.2 MPa has been reported by other authors working with several species of agronomic interest, such as soybean (Chichanosk et al, 2019), sunflower (Rossetto et al, 2021), and oat (Timm et al, 2015). According to Leal et al (2020), this is because low osmotic potentials reduce the absorption of water by seeds and can prevent the sequence of events in the germination process from occurring, thereby reducing the germination speed and percentage.…”

Section: Resultsmentioning

confidence: 73%

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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“…Unlike C. echinata, germination and initial development of Combretum leprosum Mart. was impaired already at a temperature of 25 °C in the osmotic potentials from -0.2 to -0.5 Mpa (Leal et al, 2020). The decrease in germination of seeds under water stress is a response of the enzymatic activity (Santos, Calil, Ruiz, Alvarenga & Santos, 1992) and, for each species, there is a critical value of water potential, where in many cases germination does not occur (Carvalho, 2005).…”

Section: Resultsmentioning

confidence: 99%

Seeds of Caesalpinia echinata Lam. Under Water Stress at Different Temperatures

Rodrigues¹,

Alves²,

Silva³

et al. 2020

JAS

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The Caesalpinia echinata Lam. species, belongs to the Fabaceae family, popularly known as Pau Brazil, is a large tree, native to Brazil, that can be found from Ceará to Rio de Janeiro, with a relevant national historic and economic value. The objective of this study was to evaluate the effects of water stress at different temperatures on germination and seed vigor. The experiment was carried out at the Laboratório de Análise de Sementes of the Centro de Ciências Agrárias of the Universidade Federal da Paraíba, Areia-Paraíba. The water stress was formulated with solutions of polyethylene glycol 6000 (PEG 6000) in different osmotic potentials of 0.0 (control), -0.2; -0.4; -0.6 MPa at constant temperatures of 25, 30 and 35 °C, in a completely randomized design. The percentage of germination, first counting of germination, germination speed index, length and dry matter of seedlings were evaluated to determine the effects of the treatments. Decreases of the osmotic potential negatively influenced the germination and vigor of C. echinata seeds at the three evaluated temperatures (25 ºC, 30 ºC, 35 °C).

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Water stress on germination and vigor of ‘mofumbo’ (Combretum leprosum Mart.) seeds at different temperatures

Cited by 10 publications

References 2 publications

Physiological Response of Seeds of Crotalaria spectabilis under Drought and Heat Stress

Physiological Response of Seeds of Crotalaria spectabilis under Drought and Heat Stress

Germination and vigor of soybean genotypes seeds under saline stress

Seeds of Caesalpinia echinata Lam. Under Water Stress at Different Temperatures

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