The effects of NaCl priming on salt tolerance in melon seedlings grown under saline conditions

Sivritepe, Nuray; Sivritepe, H. Özkan; Eri̇ş, A.

doi:10.1016/s0304-4238(02)00198-x

Cited by 205 publications

(130 citation statements)

References 33 publications

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“…melon (Cucumis melo L.) seedlings from primed seeds with NaCl, which displayed high salinity tolerance due to increases in K + and Ca 2+ content that induced osmoregulation by organic solute accumulation (Sivritepe et al, 2003). In addition, the differences between these studies may be related to osmotic adjustment of sorghum seedlings subjected to salt stress with NaCl, which was not verified in seeds treated with PEG-6000, as reported by Oliveira and Gomes-Filho (2009).…”

Section: Resultsmentioning

confidence: 88%

Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds

Oliveira

Alencar²,

Prisco³

et al. 2011

Sci. agric. (Piracicaba, Braz.)

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Although it has been known that the seed's physiological potential affects its response to osmoconditioning and abiotic stresses, researches involving seed aging and priming associated to abiotic stresses are scarce. The aim of this work was to evaluate the role of seed priming on salt tolerance in sorghum seedlings from seeds with two vigor levels (aged or non-aged) and to verify the organic and inorganic solute contributions as osmoregulators in NaClstressed seedlings from aged and primed seeds. The combinations of two seed vigor levels (aged or not), two seed types (primed or not) and two salinity levels (exposed to NaCl at 100 mM or not) were evaluated. In low physiological quality seeds (aged seeds), priming provided an attenuation of salinity's negative effects (0 or NaCl at 100 mM) on seedling growth. The accumulation of Na + and Cl -ions in NaCl-stressed sorghum seedling shoot from primed seeds indicate a plant osmotic adjustment induced by seed priming, which was efficient in reducing the osmotic stress caused by salinity. Proline was the main organic solute that contributed to osmoregulation in NaCl-stressed sorghum seedling shoot and its levels increased due to seed priming. Changes in inorganic and organic solute contents, in both shoot and roots, could have been induced by seed priming and as a function of salt stress tolerance, although the changes in these organs were poorly related to each other.

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Section: Resultsmentioning

confidence: 88%

Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds

Oliveira

Alencar²,

Prisco³

et al. 2011

Sci. agric. (Piracicaba, Braz.)

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“…On the other hand, the Carioca and Mulatinho common bean cultivars behaved differently regarding RL: SL and TL (Table 5). For Carioca cultivar seedlings RL:SL was higher at 100 mol.m -3 and for Mulatinho cultivar seedlings it was higher in H 2 O d and TL increased with 10mol.m -3 in Carioca cultivar seedlings and in both cultivars TL differed from controls only at 100mol.m -3 Some authors affirm that low salt concentrations can act as primers improving germination and initial growth of many species by preventing membrane damage during imbibition (Sivritepe et al, 1999;Milligan et al, 2005).…”

Section: Results and Discusionmentioning

confidence: 98%

Germination, initial growth and cotyledon protein content of bean cultivars under salinity stress

Dantas

Ribeiro²,

Aragão

2007

Rev. bras. sementes

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ABSTRACT-Excess salts in the root zone inhibit water uptake by plants, affect nutrient uptake and may result in toxicities due to individual salts in the soil solution. Excess exchangeable sodium in the soil may destroy the soil structure to a point where water penetration and root aeration become impossible. Sodium is also toxic to many plants. Beans (Phaseolus vulgaris L.) are consumed as protein source in northeastern Brazil, although little is known about common bean cultivar tolerance to salinity. The germination of bean cultivars under salt stress was studied. The cultivars 'Carioca' and 'Mulatinho' were submitted to germination test in a germinator at 25 0 C, at the Seed Analysis Laboratory of the Brazilian Agricultural Research Corporation unit in the Semi-Arid region (Embrapa Semi Árido), Petrolina, Pernambuco State. These seeds were germinated on "germitest" papers imbibed in distilled water or in 10, 50, 100 e 200 mol.m -3 sodium chloride (NaCl) solutions. At the first and second counts of the germination test, normal seedlings were counted, measured, weighed and dried, supplying data for vigor, total germination, fresh matter weight and dry matter weight and seedlings length. Total protein was quantified in cotyledons at 3, 6 and 9 days after sowing. The results indicated that the NaCl content influenced seed germination and concentrations above 50 mol.m -3 decreased germination and seedling growth.Index terms: Phaseolus vulgaris, vigor, sodium chloride. GERMINAÇÃO, CRESCIMENTO INICIAL E TEOR DE PROTEÍNA NOS COTILÉDONES DE FEIJÃO EM ESTRESSE SALINORESUMO-O excesso de sais no sistema radicular inibe a absorção de água, absorção de nutrientes e pode resultar em toxicidade de alguns sais dissolvidos na solução do solo. Excesso de sódio trocável no solo pode destruir a estrutura do solo a um ponto em que a penetração de água e a aeração das raízes se tornam impossível. Além disso, o sódio é tóxico a muitas plantas. Feijão (Phaseolus vulgaris L.) é consumido como fonte de proteínas no nordeste do Brasil, no entanto pouco se sabe sobre a tolerância desses feijões à salinidade. Este trabalho objetivou o estudo da germinação de sementes e crescimento inicial de plântulas de duas cultivares de feijão ao estresse salino. As cultivares 'Carioca' e 'Mulatinho' foram submetidas ao teste de germinação em germinador a 25 0 C, no Laboratório de Análises de Sementes da Embrapa Semi Árido, Petrolina, Pernambuco. As sementes germinaram em papel "germitest" embebido em água destilada ou em soluções de cloreto de sódio (NaCl) nas concentrações de 10, 50, 100 e 200 mol.m -3 . Na primeira e segunda contagens do teste de germinação as plântulas normais foram contadas, medidas, pesadas e secadas, obtendo-se dados de vigor e germinação total, massa de matéria fresca e seca, e comprimento de plântulas. O teor de proteínas totais foi quantificado em cotilédones aos 3, 6 e 9 dias após semeadura. Os resultados indicam que ao teor de NaCl influenciou na germinação e que concentrações acima de 50 mol.m -3 inibiram a germinação e o ...

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“…Estudos relatam que a principal vantagem do condicionamento das sementes é a maior velocidade de emergência das plântulas favorecendo a maior tolerância das sementes às adversidades climáticas, como defi cit hídrico ou ainda excesso de sal no solo, por ocasião da semeadura (Powell 2000;Cantliff e 2003). Segundo Sivritepe et al (2003) o osmocondicionamento em sementes pode ser adotado como ferramenta tecnológica útil quando se pretende cultivar espécies sob condições de salinidade, e também em ensaios de avaliação de tolerância de espécies a estresse abiótico como a salinidade do meio de cultivo.…”

Section: Resultsunclassified

Germinação de sementes osmocondicionadas e não osmocondicionadas e crescimento inicial de Physalis angulata L. (Solanaceae) em ambientes salinos

Souza

Pelacani

2011

Acta Bot. Bras.

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Germinação de sementes osmocondicionadas e não osmocondicionadas e crescimento inicial de Physalis angulata L. (Solanaceae) em ambientes salinos RESUMO (Germinação de sementes osmocondicionadas e não osmocondicionadas e crescimento inicial de Physalis angulata L. (Solanaceae) em ambientes salinos). O gênero Physalis pertencente à família Solanaceae, possui 110 espécies, das quais 11 ocorrem no Brasil. Physalis angulata L. destaca-se no gênero pela presença de vitaesteróides, principalmente as fi salinas, encontradas em raízes, caules e folhas, com propriedades imunomoduladora, antimicrobiana e anticancerígena. Este trabalho teve por objetivo avaliar a germinabilidade de sementes osmocondicionadas e não osmocondicionadas e o crescimento inicial de P. angulata em ambientes salinos. Foram realizados experimentos nos quais as sementes foram submetidas ao osmocondicionamento (PEG 6000) e colocadas para germinar em soluções com diferentes concentrações de NaCl (2, 4, 6, 10, 12, 14 e 16 dS m -1 ). O controle (0 dS m -1 ) foi realizado com água destilada. Os parâmetros avaliados foram a germinabilidade das sementes, o índice de velocidade de germinação das sementes (IVG), o coefi ciente de uniformidade de germinação e a massa seca total das plântulas. Houve diminuição da germinabilidade e do IVG, em ambos os tratamentos. No entanto, as sementes osmocondicionadas apresentaram maior tolerância ao estresse salino. Apesar da redução signifi cativa da massa seca em relação ao aumento da salinidade do meio, o osmocondicionamento como tratamento pré-germinativo poderia ser utilizado para favorecer a tolerância ao estresse salino, uma vez que a germinabilidade foi maior para sementes osmocondicionadas.Palavras-chave: NaCl, massa seca, PEG 6000, salinidade, taxa de germinação Manuela Oliveira de Souza 1,2 , Cíntia Luiza Mascarenhas de Souza 1 e Claudinéia Regina Pelacani 1 ABSTRACT (Germination of osmoprimed and non-osmoprimed seeds and initial growth of Physalis angulata (Solanaceae) in saline environments). Th e genus Physalis belongs to the Solanaceae family, with 110 species, of which 11 occur in Brazil. Physalis angulata L. stands out in the genus due to the presence of vitasteroids, especially physalins, found in roots, stems and leaves, showing antimicrobial, anticancer and immunomodulatory properties. Th is study aimed to evaluate the germination of osmotic priming treatment and non-primed seeds and the initial growth of P. angulata in saline environments. Th e seeds were subjected to priming (PEG 6000) and incubated in solutions with increasing concentration of NaCl (2, 4, 6, 10, 12, 14 and 16 dS m -1 ). Distilled water was used as control (0 dS m -1 ). Th e parameters evaluated were seed germinability, rate of germination, coeffi cient of uniformity and total dry mass of seedlings. A decrease in germinability and IVG was observed in both treatments. However, primed seeds showed higher tolerance of salt stress. Despite the signifi cant reduction in dry mass with increasing salinity, priming as a pre-germinative treatme...

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The effects of NaCl priming on salt tolerance in melon seedlings grown under saline conditions

Cited by 205 publications

References 33 publications

Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds

Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds

Germination, initial growth and cotyledon protein content of bean cultivars under salinity stress

Germinação de sementes osmocondicionadas e não osmocondicionadas e crescimento inicial de Physalis angulata L. (Solanaceae) em ambientes salinos

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