Physiological changes in osmo and hydroprimed cucumber seeds germinated in biosaline water

Matias, J. R.; Ribeiro, Renata Conduru; Aragão, Carlos Alberto; Araújo, Gherman Garcia Leal de; Dantas, B. F.

doi:10.1590/2317-1545v37n1135472

Cited by 18 publications

(16 citation statements)

References 15 publications

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“…Similar to the results in this study, a reduction in osmotic potential of the substrate caused by NaCl solution impaired seed germination and development of seedlings in other cucurbits such as watermelon (TORRES, 2007;SILVA et al, 2015), melon (ARAGÃO et al, 2009;SECCO, 2010), and cucumber (MATIAS et al, 2015). Average germination time (AGT), average germination speed (AGS) and germination speed index (GSI) all indicate the speed of germination of seeds and showed similar results ( Figure 2).…”

Section: Resultssupporting

confidence: 84%

“…The presence of ions such as sodium and/or potassium may destabilise the osmotic balance and/or membranes and metabolic processes involved in repair of cell structures (YANG et al, 2008), leading to a drastic reduction of growth and accumulation of dry matter with increasing electrical conductivity, such as those observed in the present work and in other cucurbits (MATIAS et al, 2015;DANTAS et al, 2015). Thus, plant survival depends on the ability to adapt to stress, which acts as a selective pressure, and the factors acting on the tolerance to high salinity levels are frequently dependent on the physiological complexity of the plant (ARZANI, 2008).…”

Section: Resultssupporting

confidence: 51%

“…Ascorbate peroxidase activity has a key role in the ascorbate glutathione cycle and in the elimination of H 2 O 2 in chloroplasts and the cytosol, and alterations in the activity of this enzyme are strictly correlated with plant's tolerance to oxidative stress (GILL; TUTEJA, 2010). Seeds of cucurbits such as watermelon and cucumber have also shown decrease in APX activity in response to salt stress (MATIAS et al, 2015;DANTAS et al, 2015). Catalase activity (CAT) increased in the embryonic axis of the seeds of C. pepo cv.…”

Section: Resultsmentioning

confidence: 99%

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Physiological changes in seeds and seedlings of pumpkins submitted to salt stress

Dantas¹,

Matias²,

Aragão³

et al. 2019

Biosci. J.

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Salinity is one of the most limiting environmental factors for plant growth in semi-arid regions. Excess of salts reduces water potential, causes physiological drought and can influence germination and initial growth of plants. The objective of this work was to study physiological and metabolic changes in seeds and seedlings of pumpkin (Cucurbita pepo cultivars Caserta and Redonda and C. maxima cv. Coroa) in a saline condition of salt stress. Thus, we it was quantified germination parameters; seedlings growth; seeds and seedlings respiration; degradation of total soluble sugars, reducing sugars and total proteins in cotyledons and the activity ascorbate peroxidase (APX), glutathione-S-transferase (GST) and catalase (CAT) during germination and initial growth of the pumpkin species studied in saline conditions. The experimental design was totally randomized in a factorial scheme 6x3, with six electrical conductivities (0; 2; 4; 6; 8 e 10 dS.m-1) and three cultivars (Redonda, Caserta and Coroa). Salinity did not influence the rate of seed respiration during the germination, although seedlings respiration decreased, as well as its vigour. Total sugars were degraded, while there was accumulation of reducing sugars and proteins in cotyledons of germinating seeds in salt solutions. Increased electrical conductivity reduced APX activity in the embryo and CAT in cotyledons, but did not influence GST. Pumpkin seedlings showed low tolerance to salt stress.

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Section: Resultssupporting

confidence: 84%

Section: Resultssupporting

confidence: 51%

Section: Resultsmentioning

confidence: 99%

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Physiological changes in seeds and seedlings of pumpkins submitted to salt stress

Dantas¹,

Matias²,

Aragão³

et al. 2019

Biosci. J.

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“…These crops are only harmed by EC levels higher than 11 dS m -1 (Torres, 2007;Secco et al, 2010, Matias et al, 2015b. In addition, the use of BSW with EC of approximately 4.0 dS m -1 did not affect the germination of cucumber seeds (Matias et al, 2015a).…”

Section: Resultsmentioning

confidence: 97%

Development of seedlings of watermelon cv. Crimson Sweet irrigated with biosaline water

Silva

Matias

Guirra

et al. 2015

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe limited access and the scarcity of good quality water for agriculture are some of the major problems faced in agricultural areas, particularly in arid and semiarid regions. The aim of this study was to evaluate the quality of watermelon seedlings (cv. Crimson Sweet), irrigated with different concentrations of biosaline water of fish culture. The experimental design was completely randomized with five treatments, corresponding to biosaline water at different concentrations (0, 33, 50, 67 and 100%), and four replicates of 108 seedlings. Watermelon seeds were sown in plastic trays filled with commercial substrate and irrigated with different solutions of biosaline water. Seedlings were harvested for biometric analysis at 14, 21 and 28 days after sowing. The use of biosaline water did not affect emergence and establishment of seedlings until 14 days after sowing, the period recommended for transplantation. However, the use of biosaline water affected the development of seedlings with longer exposure time.Desenvolvimento de mudas de melancia cv. Crimson Sweet em água biossalina R E S U M O A limitação ao acesso e a escassez de água de boa qualidade para a agricultura são alguns dos principais problemas enfrentados em áreas agrícolas principalmente em regiões áridas e semiáridas. Objetivou-se, neste trabalho, avaliar a qualidade das mudas de melancia cv. Crimson Sweet, irrigadas com diferentes concentrações de água biossalina de cultivo de peixe. O delineamento experimental foi inteiramente casualizado com cinco tratamentos correspondendo a soluções de água biossalina em diferentes concentrações (0, 33, 50, 67 e 100%) e quatro repetições, de 108 mudas. As sementes de melancia cv. Crimson Sweet foram semeadas em bandejas plásticas preenchidas com substrato comercial e irrigadas com as diferentes soluções de água biossalina. As mudas foram coletadas para realização das análises biométricas aos 14,21 e 28 dias após a semeadura. O uso de água biossalina não afetou a emergência nem o estabelecimento das plântulas até os 14 dias após a semeadura, período recomendado para o transplantio; entretanto, a utilização de água biossalina afetou o desenvolvimento de mudas com maior período de exposição.

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“…The reason for this may be due to the stimulatory effect of sodium chloride, which has the effect of stimulating out of root in seed and increases the germination percentage at low concentration of salt. Matias et al (2015) reported seed priming more efficient to improve the performance of cucumber seedling in bio-saline water.…”

Section: Discussionmentioning

confidence: 99%

Effect of nutri-priming on germination indices and physiological characteristics of stevia seedling under salinity stress

2017

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-Poor germination and low seedling growth of stevia (Stevia rebuadiana Bertoni) are common problems in the cultivation of the plant. On the other hand, salinity is one of the abiotic environmental stresses that reduce the performance of the product. The objective in this study was to assess the effect of nutri-priming with selenium (Se), iron (Fe) and boron (B) on stevia seed germination indices and physiological characteristics in sodium chloride (NaCl) salinity condition (0, 30, 60 and 90 mM). Results indicated that the effect of salinity in nutri-priming were significant on germination percentage, germination rate, germination uniformity, germination value, seedling length, seedling vigor index, total chlorophyll, free proline content and enzymatic activity of catalase (CAT) and superoxide dismutase (SOD). Salinity stress decreased the percentage and rate of germination and seed vigor, however, nutri-priming reduces the adverse effects of salinity stress. Salinity also reduced the amount of chlorophyll content, in spite of all that this decrease was very low in terms of nutri-priming with Se, Se+Fe and Se+Fe+B in high salinity level (90 mM). Salinity stress increased proline content and antioxidant enzyme activities of CAT and SOD, that nutri-priming especially with the Se more increased. The finding of this study leads to the conclusion that nutri-priming with nutrients, especially Se and Fe increased the antioxidant capacity of the plant to improve germination and seedling growth of stevia under salinity stress.Index terms: antioxidant activity, chlorophyll, germination rate, germination uniformity, seed vigor.Efeito do amortecimento de nutrientes nos índices de germinação e nas características fisiológicas da plântula de stevia sob o estresse de salinidade RESUMO -A má germinação e o baixo crescimento das mudas de stevia (Stevia rebuadiana Bertoni) são problemas comuns no cultivo da planta. Por outro lado, a salinidade é um dos estresses ambientais abióticos que reduzem o desempenho do produto. O objetivo deste estudo foi avaliar o efeito do selênio (Se), ferro (Fe) e boro (B) nos índices de germinação de sementes de stevia e características fisiológicas na condição de salinidade com cloreto de sódio (NaCl) (0, 30, 60 e 90 mM). Os resultados indicaram que o efeito da salinidade na nutrição foi significativo na porcentagem de germinação, na taxa de germinação, na uniformidade da germinação, no valor da germinação, no comprimento da plântula, no índice de vigor da plântula, clorofila total, teor de prolina livre e atividade enzimática da catalase (CAT) e superóxido dismutase (SOD). O estresse por salinidade diminuiu a porcentagem e a taxa de germinação e vigor de sementes, no entanto, o amortecimento de nutrientes reduz os efeitos adversos do estresse por salinidade. A salinidade também reduziu a quantidade de teor de clorofila, apesar de tudo isso, esta diminuição foi muito baixa em termos de nutrição com Se, Se + Fe e Se + Fe + B em alto nível de salinidade (90 mM). O estresse de salinidade aument...

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Physiological changes in osmo and hydroprimed cucumber seeds germinated in biosaline water

Cited by 18 publications

References 15 publications

Physiological changes in seeds and seedlings of pumpkins submitted to salt stress

Physiological changes in seeds and seedlings of pumpkins submitted to salt stress

Development of seedlings of watermelon cv. Crimson Sweet irrigated with biosaline water

Effect of nutri-priming on germination indices and physiological characteristics of stevia seedling under salinity stress

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