scholarly journals Physiological performance of common bean seeds of the black commercial group under saline stress

2021 ◽  
Vol 17 (2) ◽  
pp. 59-66
Author(s):  
Josiane Cantuária Figueiredo ◽  
Elson Junior Souza da Silva ◽  
Jorge Luiz Rodrigues Barbosa ◽  
Jéssica Mengue Rolim ◽  
Amanda Martins Silva ◽  
...  
Keyword(s):  
Salt Stress ◽  
Shoot Length ◽  
Saline Stress ◽  
Nacl Solution ◽  
Physiological Performance ◽  
Black Bean ◽  
Sodium Chloride Solutions ◽  
Germination Speed ◽  
Randomized Experimental Design ◽  
Osmotic Potentials

Saline stress is a condition that causes changes in physiological performance in several species and even in cultivars of the same species. Thus, this studyaimed to evaluate the physiological performance of black bean cultivars to salt stress. A completely randomized experimental design was used in a factorial scheme with two cultivars (Mataço and BRS Paisano) and five osmotic potentials simulated with sodium chloride solutions (control = 0.0; -0.2; -0.4; -0.6 and -0.8 MPa), in four replications of 50 seeds per treatment. The variables related to germination, first germination count, germination speed index, and shoot length were evaluated. There were significant interactions (p <0.05) for all variables analyzed. In general, it is concluded that the physiological performance of the seeds of black bean cultivars is affected under simulated saline stress by NaCl solution with an osmotic potential below -0.2 MPa.

scholarly journals Influence of priming on Eucalyptus spp seeds' tolerance to salt stress

2016 ◽  
Vol 38 (4) ◽  
pp. 329-334 ◽  
Author(s):  
Anderson Cleiton José ◽  
Natália Cristina Nogueira Silva ◽  
José Marcio Rocha Faria ◽  
Wilson Vicente Souza Pereira
Keyword(s):  
Salt Stress ◽  
Seed Germination ◽  
Water Potential ◽  
Salt Solution ◽  
Germination Percentage ◽  
Eucalyptus Urophylla ◽  
Nacl Solution ◽  
Peg 6000 ◽  
Germination Speed ◽  
Osmotic Potentials

Abstract: The objective of this experiment was to evaluate the effect of priming on the germination of Eucalyptus urophylla and of hybrid E. urophylla × E. grandis seeds under salt stress. Two osmotic potentials (-1.0 and -1.5 MPa) were tested, using PEG 6000 for 1 and 3 days. After priming, seeds were germinated under salt stress in a NaCl solution at 0.0 (control), -0.5, -0.75 and -1.0 MPa potentials, at 25 °C. Seed germination and germination speed index decreased as the water potential of the germination medium decreased. However, E. urophylla was more tolerant to salt stress; it showed a higher germination percentage under all tested potentials, when compared to the hybrid. The osmotic conditioning at -1.0 MPa for three days was more effective when E. urophylla x E. grandis was germinated in a salt solution at -1.0 MPa, indicating that this treatment was more effective in inducing tolerance to salt stress.

scholarly journals Germination and Vigor of Black Bean (Phaseolus vulgaris L.) Cultivars Subjected to Saline Stress Conditions

2020 ◽  
Vol 12 (9) ◽  
pp. 159
Author(s):  
Lucas Vinícius de Souza Cangussu ◽  
Andréia Márcia Santos de Souza David ◽  
Fernando Henrique Batista Machado ◽  
Josiane Cantuária Figueiredo ◽  
Cleisson Dener da Silva ◽  
...  
Keyword(s):  
Dry Mass ◽  
Stress Conditions ◽  
Saline Stress ◽  
State University ◽  
Black Bean ◽  
Sodium Chloride Solutions ◽  
Seed Analysis ◽  
Germination Process ◽  
Analysis Laboratory ◽  
Osmotic Potentials

Natural factors such as salinity act directly on seed germination and vigor and, consequently, affect the establishment and development of seedlings in the field. In view of the above, the objective of this study was to assess the effect of saline stress on the germination and vigor of seeds from black bean cultivars. The study was conducted at the Seed Analysis Laboratory of the State University of Montes Claros, Jana&uacute;ba-Minas Gerais, Brazil. The experimental design was completely randomized, in a 2 &times; 5 factorial arrangement (two cultivars &times; five osmotic potentials), with four repeats of 50 seeds per treatment. Bean seeds from cultivars Campeiro and Esteio were used, with sowing carried out on germitest paper rolls moistened at five osmotic potentials via sodium chloride solutions (NaCl): 0.0 [distilled water]; -0.3; -0.6; -0.9 and -1.2 MPa. Seed rolls were kept in a digital germinator, and the germination and vigor percentages of the seeds were determined by first germination count, germination speed index (GSI), and fresh and dry mass of seedlings. The germination and vigor of seeds from common-bean cultivars, black commercial type, are negatively affected under saline stress caused by NaCl solution with osmotic potential lower than -0.6 MPa. The seeds of the studied cultivars showed a different behavior regarding saline stress conditions, and cultivar Campeiro proved to be more tolerant to saline stress in relation to Esteio during the germination process and seedling formation.

scholarly journals Effects of saline stress and temperature on germination and seed vigor of Luffa operculata L. Cogn

2020 ◽  
pp. 1779-1785
Author(s):  
Paulo Costa Araújo ◽  
Paulo Alexandre Fernandes Rodrigues de Melo ◽  
Edna Ursulino Alves ◽  
Antônio Pereira dos Anjos Neto ◽  
Aderson Costa Araujo Neto ◽  
...  
Keyword(s):  
Climate Change ◽  
Salt Stress ◽  
Osmotic Potential ◽  
Respiratory Diseases ◽  
Seed Vigor ◽  
Saline Stress ◽  
Seedling Root ◽  
Germination Speed ◽  
Different Temperatures ◽  
Moderate Salinity

Luffa operculata (L.) is a native Brazilian biome plant used for the treatment of respiratory diseases. Although Brazil’s flora comprises 67% of the world’s plants, only 8% of Brazilian plant species are studied each year. The studies indicate that climate change in tropical biomes intensifies the increase in salinized areas by about 10% per year for several reasons, including high temperatures, low rainfall and high evapotranspiration rates, due to surface water scarcity. Therefore, the aim of the present study was to evaluate the germination behavior and vigor of L. operculata seeds submitted to saline stress at different temperatures. To simulate salt stress conditions, sodium chloride was applied at 0.0; 3.0; 6.0; 9.0 and 12.0 dS m-1, at 25, 30, 35, 20-30 °C, with treatments distributed in a 5 x 4 factorial scheme (five levels of osmotic potential and four temperatures), using four replications. The seeds were then evaluated concerning water content, germination tests, first counts, germination speed index and seedling root and shoot lengths. At 30 and 35 °C, the seed germination and vigor of L. operculata were less affected up to an osmotic potential of 9.0 dS m-1, where it is considered a moderate salinity tolerance. At 35 ºC, the germination uniformity was reduced to 98 and 93% by applying the 6 and 9 dS m-1 solutions, respectively. For the same temperature, the germination velocity remained 6.09 (IVG) until the saline potential of 9.0 dS m-1

scholarly journals Antioxidant activity and physiological performance of popcorn seed after saline stress and analysis of seedling images

2020 ◽  
Vol 44 ◽  
Author(s):  
Hugo Cesar Rodrigues Moreira Catão ◽  
Franciele Caixeta ◽  
Amanda Moreira Lopes ◽  
Flavia Andrea Nery-Silva ◽  
Adílio de Sá Júnior
Keyword(s):  
Antioxidant Activity ◽  
Salt Stress ◽  
Dry Mass ◽  
Saline Stress ◽  
Physiological Performance ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
The Relationship

ABSTRACT Salinity influences all germination stages and may adversely affect seedling establishment in the field. The objective of this research was to determine the relationship between the antioxidant activity and the physiological performance of seeds and to verify the efficacy of the imaging analysis of popcorn seedlings after seed exposure to saline stress. A completely randomized design was used that consisted of four replicates in a factorial scheme. This scheme comprised three popcorn hybrids (P618, AP6002, and AP8203) and five saline potential levels (0.0; -0.1; -0.3; -0.6, and -0.9 MPa) that were obtained from KCl solutions of different concentrations. First count germination, germination and seedling vigor classification (strong normal seedlings), and dry mass of seedlings were evaluated to determine the physiological quality of the seed. The images of seedlings were used to evaluate the coleoptile and root lengths, indices of vigor, uniformity, and growth using the Groundeye® software. The activities of the antioxidant enzymes superoxide dismutase (SOD), ascorbate peroxidase (APX), and catalase (CAT) were also determined. Saline stress compromises the physiological quality and antioxidant activity of seeds and the performance of popcorn seedlings. Computerized image analysis using Groundeye® was efficient in evaluating the popcorn seedlings after being subjected to salt stress. Hybrids AP6002 and AP8203 were more tolerant to salt stress than hybrid P618.

scholarly journals GERMINATION OF CREOLE MAIZE AND FAVA BEAN SEEDS UNDER SALT STRESS

2020 ◽  
Vol 33 (3) ◽  
pp. 853-859
Author(s):  
CARLA DE SOUZA ALMEIDA ◽  
HUGO ROLDI GUARIZ ◽  
MARÍLIA ALVES BRITO PINTO ◽  
MARINEIDE FERREIRA DE ALMEIDA
Keyword(s):  
Salt Stress ◽  
Rural Areas ◽  
Zea Mays L ◽  
Germination Percentage ◽  
Phaseolus Lunatus ◽  
Fava Bean ◽  
Randomized Experimental Design ◽  
Salinity Levels ◽  
Osmotic Potentials ◽  
Arid And Semiarid

ABSTRACT Salt stress negatively affects plant development, mainly in arid and semiarid regions, promoting changes in their physiology and productivity. The objective of this study was to evaluate the germinative potential of creole maize (Zea mays L.) and fava bean (Phaseolus lunatus L.) seeds under different salt stress conditions. The seeds were collected in rural areas of the municipalities of Guanambi, Candiba, and Brumado, which are within the Serra Geral region in the state of Bahia, Brazil. A completely randomized experimental design was used; the treatments consisted of three salts (CaCl2, MgCl2, and NaCl) and four salinity levels (osmotic potentials of -0.3, -0.9, and -1.2 MPa). Seed physical analyses included moisture and purity, and physiological analyses included germination percentage, germination speed index, average germination time, and relative germination frequency. The storage of creole maize and fava bean seeds in plastic bottles and under adequate humidity ensures that seeds will have moisture content and physical purity within ideal values. Salt stresses induced by NaCl and CaCl2 salts at osmotic potentials of -0.3 to -1.2 MPa hinder the creole maize and fava bean seed germination, and their germination are null for both salts at osmotic potentials lower than -0.3 MPa. The creole maize and fava bean seeds show germination of 70% under salt stress induced by MgCl2 at osmotic potential of -0.3 MPa, making the germination of both species viable.

scholarly journals WATER AND SALT STRESSES ON GERMINATION OF COWPEA ( Vigna unguiculata cv. BRS Tumucumaque) SEEDS

2017 ◽  
Vol 30 (4) ◽  
pp. 1009-1016 ◽  
Author(s):  
AUREANE CRISTINA TEIXEIRA FERREIRA ◽  
RICARDO ADRIANO FELITO ◽  
ADRIANO MALTEZO DA ROCHA ◽  
MARCO ANTONIO CAMILLO DE CARVALHO ◽  
OSCAR MITSUO YAMASHITA
Keyword(s):  
Salt Stress ◽  
Experimental Designs ◽  
Initial Growth ◽  
Fresh Weight ◽  
Evaluation Period ◽  
Peg 6000 ◽  
Sodium Toxicity ◽  
Germination Speed ◽  
Cowpea Seed ◽  
Osmotic Potentials

ABSTRACT The objective of this work was to evaluate seeds of cowpea, cultivar BRS Tumucumaque, subjected to different water stresses induced by polyethylene glycol (PEG-6000) and mannitol and different salt stresses induced by NaCl and CaCl2 solutions. The water and salt stresses was evaluated in laboratory using completely randomized experimental designs in 2x6 factorial arrangements, with six osmotic potentials (0.0, -0.2, -0.4, -0.6, -0.8 and -1.0 MPa) and two stress inducers for each experiment, with four replications of 50 seeds. The percentage of germination, germination speed index, root and shoot lengths and seedling fresh weight were evaluated at the tenth day (end of the evaluation period). The simulated water stress showed effects on the cowpea seed germination and seedling initial growth by decreasing the rates of the variables evaluated, which had greater effect in treatments with PEG-6000. The salt stress induced by NaCl showed greater effect on the variables evaluated than that induced by CaCl2, due to the sodium toxicity in the salt chemical composition.

scholarly journals Salinity tolerance in Senna macranthera (DC. ex Collad.) H. S. Irwin & Barneby seeds with sodium nitroprusside (SNP) promoted by cyanide

2018 ◽  
Vol 40 (3) ◽  
pp. 323-330 ◽  
Author(s):  
Aparecida Leonir da Silva ◽  
Daniel Teixeira Pinheiro ◽  
Eduardo Euclydes de Lima e Borges ◽  
Laércio Junio da Silva ◽  
Denise Cunha Fernandes dos Santos Dias
Keyword(s):  
Nitric Oxide ◽  
Salt Stress ◽  
Sodium Nitroprusside ◽  
Germination Rate ◽  
Seedling Development ◽  
Nitric Oxide Donor ◽  
Germination Process ◽  
Germination Speed ◽  
Positive Effect ◽  
Osmotic Potentials

Abstract: Studies show the positive effect of the nitric oxide donor in the seed germination process. However, there are no precise reports about which compound present in sodium nitroprusside would cause these effects in seeds under salt stress. The aim of this study was to evaluate the effects of SNP on germination of Senna macranthera seeds under salt stress. The osmotic potentials of -0.3, -0.4, and -0.5 MPa of NaCl were used, as well as the concentration of 100 μM of sodium nitroprusside, inactive sodium nitroprusside, and ferrocyanide. The sodium nitroprusside in germination was applied before, during, and after salt stress. Germination rate, germination speed index, percentage of normal seedlings, and seedling development components were evaluated. The treatments that proved to be more promising in recovery of germination under salt stress are -0.4 MPa together with SNP; -0.4 MPa together with inactive SNP; -0.5 MPa together with SNP and -0.5 MPa together with inactive SNP. Effects similar to those brought about by the sodium nitroprusside treatment were also observed in the treatments with inactive sodium nitroprusside and ferrocyanide, indicating that the effects observed were related to release of the cyanide present in the sodium nitroprusside.

scholarly journals Tolerance of Varieties and Hybrid of Pumpkin and Squash to Salt Stress

2017 ◽  
Vol 10 (1) ◽  
pp. 38 ◽  
Author(s):  
Adriana Da S. Santos ◽  
Francisco V. da S. Sá ◽  
Lauter S. Souto ◽  
Maria K. do N. Silva ◽  
Romulo C. L. Moreira ◽  
...  
Keyword(s):  
Salt Stress ◽  
Irrigation Water ◽  
Saline Water ◽  
Water Salinity ◽  
Irrigated Agriculture ◽  
Saline Stress ◽  
Dry Matter Accumulation ◽  
Initial Growth ◽  
Irrigation Water Salinity ◽  
Randomized Experimental Design

Irrigated agriculture in arid and semi-arid regions is a practice encouraged to maximize food production, however these regions hesitate a qualitative shortage of water resources, often being necessary the use of saline water, affecting soil and sensitive plants to saline stress. So this study aimed to evaluate emergence, growth, phytomass accumulation and tolerance of the Tetsukabuto hybrid and varieties of pumpkin and squash under salt stress. The experiment was carried out in protected environment (greenhouse), located in the municipality of Pombal, Paraíba, Brazil. Treatments were arranged in completely randomized experimental design with four replicates, in a 5 × 3 factorial scheme, relative to five levels of irrigation water salinity and three genotypes of pumpkin and squash. Pumpkin and squash seedlings were grown on trays of 30 cells with capacity for 0.1 dm3 of substrate, during the first 20 days after sowing, and were monitored for emergence, initial growth, dry matter accumulation and tolerance to salinity. Increment in irrigation water salinity reduces emergence and initial growth of the pumpkin and squash genotypes. The genotypes G2 - ‘Squash cv. Coroa’ and G3 - Tetsukabuto hybrid are more tolerant to salinity than G1 - ‘Pumpkin cv. Jacarezinho’ in the initial growth stage.

scholarly journals Seedling, early vegetative, and adult plant growth of oilseed rapes (Brassica napus L.) under saline stress

2019 ◽  
Vol 99 (6) ◽  
pp. 927-941
Author(s):  
Sanjaya Gyawali ◽  
Isobel A.P. Parkin ◽  
Harold Steppuhn ◽  
Miles Buchwaldt ◽  
Bijaya Adhikari ◽  
...  
Keyword(s):  
Salt Stress ◽  
Brassica Napus ◽  
Root Length ◽  
Shoot Length ◽  
Adult Plant ◽  
Limiting Factor ◽  
Saline Stress ◽  
Plant Responses ◽  
Brassica Napus L ◽  
Progress Curve

Salinity is a major limiting factor for early crop establishment and yield. In this study, 131 Brassica napus genotypes were evaluated for germination and early seedling growth in Murashige & Skoog medium supplemented with NaCl. Selected genotypes were then evaluated for tolerance to salinity at the vegetative and reproductive stages in greenhouse and semi-hydroponic systems using 1.4, 5, 10, 15, 20, and 28 dS m−1 salt stress. Relative salt tolerance (RST) was calculated and compared with genotype performance under no salt stress (control). The area under the germination progress curve (AUGPC) varied from 53 to 90 in the control and from 6 to 89 under 200 mmol L−1 NaCl stress. The seedling vigor index (SVI) ranged from 200 to 1606 and 10 to 736 in the control and 200 mmol L−1 salt stress treatments, respectively. The RST for germination, root length, shoot length, and SVI ranged from 8% to 97.7%, 2% to 98.3%, 6.5% to 70.8%, and 1.9% to 83%, respectively. Root length was most severely affected by saline conditions, followed by shoot length and AUGPC, when RST percentages of these traits were compared among responses of the 131 genotypes. Genotypes showed varying levels of proline and glucosinolate accumulation under different levels of saline stress. Greater accumulation of proline and glucosinolates was recorded with increased salinity level. This study indicates that variation exists in seedling and adult plant responses to saline stress in B. napus genotypes and that improvement for salinity tolerance requires selection at the seedling, vegetative, and reproductive plant stages.

scholarly journals Physiological quality of seeds and growth of seedlings of chickpea under salt stress

2021 ◽  
Vol 10 (11) ◽  
pp. e597101119940
Author(s):  
Amanda Maria Leal Pimenta ◽  
Nelson de Abreu Delvaux Júnior ◽  
Sérgio Manoel da Silva Fernandes ◽  
Josiane Cantuária Figueiredo ◽  
Samy Pimenta ◽  
...  
Keyword(s):  
Salt Stress ◽  
Seedling Growth ◽  
Primary Root ◽  
Dry Mass ◽  
Sodium Chloride Solutions ◽  
Physiological Quality ◽  
Mean Germination Time ◽  
Germination And Growth ◽  
Osmotic Potentials

Salt stress is a condition that causes physiological changes in several species, the identifying cultivars tolerant to such conditions is essential to high salinity environments. The objective was to evaluate the physiological quality of seeds of chickpea cultivars to salt stress during germination and seedling growth. Two cultivars (‘BRS Cícero’ and ‘BRS Aleppo’) and five osmotic potentials simulated with sodium chloride solutions (0.0; -0.2; -0.4; -0.6 and -0.8 MPa), were evaluated by the test of germination speed index, mean germination time, epicotyl and primary root length, epicotyl and primary root fresh mass, epicotyl and the primary root dry mass of the seeds were evaluated. Significant interactions were found for all variables, indicating that there are cultivars with specific performance for a particular salt condition, and the simulated salt stress conditions negatively affected germination and seedling growth. Osmotic potentials of less than -0.4 MPa are harmful to the germination and growth of chickpea seedlings. The ‘BRS Cícero’ seeds showed a higher salt tolerance than ‘BRS Aleppo’. The cultivar BRS Aleppo has a longer epicotyl length compared to 'BRS Cícero' when subjected to the same conditions of salt stress.

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