scholarly journals Vigour in maize seeds: influence on seedling development under conditions of salt stress

2016 ◽  
Vol 47 (3) ◽  
pp. 491-499 ◽  
Author(s):  
Rosemeire Carvalho da Silva ◽  
Camila Ribeiro de Souza Grzybowski ◽  
Maristela Panobianco
Keyword(s):  
Salt Stress ◽  
Seedling Development ◽  
Maize Seeds

scholarly journals Pretreatment with H2O2 in maize seeds: effects on germination and seedling acclimation to salt stress

2010 ◽  
Vol 22 (2) ◽  
pp. 103-112 ◽  
Author(s):  
Franklin A Gondim ◽  
Enéas Gomes-Filho ◽  
Claudivan F Lacerda ◽  
José Tarquinio Prisco ◽  
André D Azevedo Neto ◽  
...  
Keyword(s):  
Salt Stress ◽  
Maize Seeds

Ultrastructural and biochemical changes induced by salt stress in Jatropha curcas seeds during germination and seedling development

2015 ◽  
Vol 42 (9) ◽  
pp. 865 ◽  
Author(s):  
Nara L. M. Alencar ◽  
Cibelle G. Gadelha ◽  
Maria I. Gallão ◽  
Mary A. H. Dolder ◽  
José T. Prisco ◽  
...  
Keyword(s):  
Salt Stress ◽  
Seed Germination ◽  
Jatropha Curcas ◽  
Stress Proteins ◽  
Dry Mass ◽  
Nacl Stress ◽  
Seedling Development ◽  
Biochemical Changes ◽  
Stress Conditions ◽  
Ultrastructural Changes

Jatropha curcas L. is a multipurpose species of the Euphorbiaceae family that is widespread in arid and semiarid regions. This study investigated the ultrastructural and biochemical changes induced by salt stress during J. curcas seed germination and seedling development. Salt stress negatively affected seed germination and increased Na+ and Cl– contents in endosperms and embryo-axis. Lipids represented the most abundant reserves (64% of the quiescent seed dry mass), and their levels were strongly decreased at 8 days after imbibition (DAI) under salinity stress. Proteins were the second most important reserve (21.3%), and their levels were also reduced under salt stress conditions. Starch showed a transient increase at 5 DAI under control conditions, which was correlated with intense lipid mobilisation during this period. Non-reducing sugars and free amino acids were increased in control seeds compared with quiescent seeds, whereas under the salt-stress conditions, minimal changes were observed. In addition, cytochemical and ultrastructural analyses confirmed greater alterations in the cellular reserves of seeds that had been germinated under NaCl stress conditions. Salt stress promoted delays in protein and lipid mobilisation and induced ultrastructural changes in salt-stressed endosperm cells, consistent with delayed protein and oil body degradation.

QUALIDADE FISIOLÓGICA E EXPRESSÃO DE ALFA-AMILASE EM SEMENTES DE MILHO PRODUZIDAS EM CONDIÇÕES DE ESTRESSE SALINO E HÍDRICO

2018 ◽  
Vol 17 (1) ◽  
pp. 37 ◽  
Author(s):  
RAFAEL PAREIRA DINIZ ◽  
IOLANDA VILELA VON PINHO ◽  
BRUNO DA COSTA PANIAGO ◽  
EDILA VILELA DE REZENDE VON PINHO ◽  
HELOISA OLIVEIRA DOS SANTOS ◽  
...  
Keyword(s):  
Zea Mays ◽  
Salt Stress ◽  
Zea Mays L ◽  
Block Design ◽  
Stress Conditions ◽  
Maturity Stage ◽  
Development Stages ◽  
Maize Seeds ◽  
Physiological Analysis ◽  
Seeds Germination

RESUMO - Durante o processo de produção de sementes, estresses abióticos como salinidade do solo e déficit hídrico são fatores determinantes e que influenciam no estabelecimento e desenvolvimento uniforme do estande em campo. Nesse sentido, cultivares tolerantes a altas concentrações salinas nestas fases são fundamentais nos programas de melhoramento. Diante disto, objetivou-se com a presente pesquisa verificar a influência da produção de sementes sob condições de estresse hídrico e salino na germinação e no vigor, assim como na atividade da enzima α-amilase em sementes de milho. Para isso, foram conduzidos dois experimentos para a produção de sementes de milho, um em condições de estresse salino e o outro sob condições de déficit hídrico. Os experimentos foram conduzidos em delineamento de blocos completos casualisados, em esquema de parcelas subdivididas. As sementes colhidas em diferentes estádios de desenvolvimento, determinados pela linha de leite (LL), foram submetidas a análises fisiológicas e de vigor, bem como determinou-se a expressão da enzima α-amilase por eletroforese. Diante dos resultados foi possível concluir que a germinação e o vigor das sementes produzidas em solos com condutividade de 3 dS m-1 não são afetados pela salinidade, e o desenvolvimento das plantas em condições de estresse hídrico e salino não afetou a atividade da enzima α-amilase em sementes colhidas na LL5. Palavras-chave: Zea mays L., eletroforese, estádios de desenvolvimento. PHYSIOLOGICAL QUALITY AND ALPHA-AMYLASE EXPRESSION OF MAIZE SEEDS IN CONDITIONS OF SALT AND WATER STRESS ABSTRACT - During seed production process, abiotic stresses such as soil salinity and drought are determining factors that influence the establishment and development of uniform stand on the field. Thus, tolerant cultivars to high salt concentrations in these phases are critical in breeding programs. This way, we aimed to investigate seeds production in conditions of water and salt stress on maize seeds germination and vigor as well as the α-amylase enzyme activity. Two experiments were performed for maize seeds production in salt stress conditions and drought. The experiments were conducted in a randomized complete block design in a split-plot arrangement. Seeds harveste at different development stages, determined by milk line (ML), were submitted to vigor and physiological analysis as well as the expression determination of α-amylase enzyme by electrophoreses. With the results it was concluded that both, the seeds germination and vigor produced in soil with conductivity 3 dS m-1, are not affected by salinity, and the plants development in water and salt stress conditions did not affect the activity of α-amylase enzyme in seedsharvested in ML5 maturity stage. Keywords: Zea mays L., electrophoresis, development stages.

scholarly journals Salicylic acid: physiological and biochemical changes in seeds and maize seedlings subjected to salt stress

2013 ◽  
Vol 35 (4) ◽  
pp. 457-465 ◽  
Author(s):  
Fernanda Reolon Tonel ◽  
Patrícia Marini ◽  
Juliana de Magalhães Bandeira ◽  
Dario Munt de Moraes ◽  
Luciano do Amarante
Keyword(s):  
Salicylic Acid ◽  
Antioxidant Enzymes ◽  
Salt Stress ◽  
Seed Viability ◽  
Initial Growth ◽  
Maize Seedlings ◽  
Maize Seeds ◽  
Nacl Concentration ◽  
Physiological And Biochemical ◽  
Defense Function

Several plant species have development limitations on saline soils; however under water stress situations salicylic acid (SA) may have defense function by acting as antioxidant. Thereby, this study was aimed at analyzing physiological changes occurring in maize seeds treated with SA and germinated on sodium chloride moistened substrate; as well as assessing the effect of antioxidant enzymes produced by the seedlings. To this, seeds were soaked into zero and 1 mM SA solutions, for 60 min., and germinated on different NaCl concentrations (0, 30, 90, and 180 mM), and afterwards evaluated for germination, germination speed index, initial growth, and effect of antioxidant enzymes on seedlings. For electrical conductivity test, the seeds were previously soaked in NaCl solutions with and without SA. The SA application has minimized damages induced by salt stress to maize seed germination by favoring their germination percent; however without SA was not able on maintaining seed viability over 90 mM. Seedling initial growth was impaired by increasing NaCl concentrations in substrate; and electric conductivity has shown low values for release of solutes in the presence of SA. Activity of antioxidant enzymes has increased until 30 mM NaCl concentration; however above such concentration activity of these enzymes was reduced. The SA maintains germination of corn seeds above 90 mM NaCl; however, generally it is not efficient to ensure vigor of seedlings.

scholarly journals Does nitric oxide protect Eucalyptus urophylla seeds under salt stress conditions?

2020 ◽  
Vol 42 ◽  
Author(s):  
Thalita Maciel Pereira ◽  
Heloisa Oliveira dos Santos ◽  
Antonio Rodrigues da Cunha Neto ◽  
Fabieli Pelissari ◽  
Wilson Vicente Pereira ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Salt Stress ◽  
Primary Root ◽  
Morphological Characteristics ◽  
Potassium Nitrate ◽  
Seedling Development ◽  
Seed Vigor ◽  
Stress Conditions ◽  
Control Treatment ◽  
Eucalyptus Urophylla

Abstract: The germination response of seeds under artificial stress conditions is a tool for better understanding of the survival and adaptation ability of species under natural stress conditions. The aims of this study were to evaluate the protective effect of nitric oxide during germination as well as seed vigor and seedling development of Eucalyptus urophylla under salt stress conditions. The experimental design was completely randomized, with five replications, in a 3 × 3 + 1 factorial arrangement, with three priming factors [water, sodium nitroprusside (SNP), and potassium nitrate (KNO3)], three germination conditions (distilled water, and the water potentials of -0.6 and -1.2 MPa), and an additional control treatment (unprimed seeds). The following determinations were made: germination count at seven and fourteen days, germination speed index, primary root length, shoot length, and total length. SNP protects seeds, leading to a higher percentage of germination, as well as greater root growth and total seedling size, whereas KNO3 is not effective in protecting seeds that suffer from salt stress, which affects their physiological and morphological characteristics. E. urophylla seeds are sensitive to salt stress, and physiological priming with SNP leads to an increase in the percentage of germination, vigor, and seedling development under salinity conditions.

scholarly journals Effects of vitamin pre-sowing treatment on sweet maize seedlings irrigated with saline water

2020 ◽  
Vol 69 (1) ◽  
pp. 20-25
Author(s):  
Eduardo Pradi Vendruscolo ◽  
Alexsander Seleguini
Keyword(s):  
Salt Stress ◽  
Salinity Stress ◽  
Dry Matter ◽  
Saline Water ◽  
Initial Growth ◽  
Initial Development ◽  
Combined Application ◽  
Maize Seeds ◽  
Negative Effect ◽  
Combined Solution

Salinity stress represents an obstacle for the production of plants of commercial interest, including sweet maize.  Among the techniques used to suppress the effects caused by excess salts in the soil is the exogenous application of vitamins.  Thus, the objective of this study was to evaluate the effect of the pre-sowing treatment of sweet maize seeds in solutions of thiamine, niacin and these two vitamins combined on the development of the plants irrigated with saline water.  The treatments were composed by the 24 h pre-sowing treatment with water, thiamine solution (thiamine 100 mg L-1), niacin solution (niacin 100 mg L-1) and a combined solution with these two vitamins (thiamine 50 mg L-1 + niacin 50 mg L-1) irrigated with saline water.  A control (pre-sowing treatment with water and irrigation with non-saline water) was also used.  It was observed that salinity stress affects the sweet maize initial development. Application of isolate thiamine or niacin and its combined application improves the relative contents of chlorophyll ‘a’ and total, height of shoot, leaf number, diameter of stem and shoot, root and total dry matter, reducing dry matter losses by 8.89%, 25.46% and 39.60%, respectively.  Soaking seeds for 24 h in thiamine and niacin solutions improve the initial growth of sweet maize plants under salt stress and a combined vitamin solution (thiamine 50 mg L-1 + niacin 50 mg L-1) effectively reduces the salt stress negative effect on the initial development of these plants. 

Sign in / Sign up

Export Citation Format

Share Document