Osmotic and ionic effects of NaCl and Na2SO4 salinity on Phragmites australis

Pagter, Majken; Bragato, Claudia; Malagoli, Mario; Brix, Hans

doi:10.1016/j.aquabot.2008.05.005

Cited by 110 publications

(66 citation statements)

References 35 publications

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“…concentrations of lentisc plants subjected to salty water irrigation were almost half values in the soil/water medium. Even more importantly, our findings are consistent with those of higher xylem sap osmolality as salinity increases, as in Pagter et al (2009), who reported expressed sap osmolality of roots of Phragmites australis ranging from 150 to 600 mmol kg -1 as salinity rose, and in Sobrado (2001), with the mangrove Avicennia germinans.…”

Section: Hydraulic Lift and Species Interactionssupporting

confidence: 93%

Hydraulic lift and tolerance to salinity of semiarid species: consequences for species interactions

et al. 2009

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The different abilities of plant species to use ephemeral or permanent water sources strongly affect physiological performance and species coexistence in water-limited ecosystems. In addition to withstanding drought, plants in coastal habitats often have to withstand highly saline soils, an additional ecological stress. Here we tested whether observed competitive abilities and C-water relations of two interacting shrub species from an arid coastal system were more related to differences in root architecture or salinity tolerance. We explored water sources of interacting Juniperus phoenicea Guss. and Pistacia lentiscus L. plants by conducting physiology measurements, including water relations, CO2 exchange, photochemical efficiency, sap osmolality, and water and C isotopes. We also conducted parallel soil analyses that included electrical conductivity, humidity, and water isotopes. During drought, Pistacia shrubs relied primarily on permanent salty groundwater, while isolated Juniperus plants took up the scarce and relatively fresh water stored in upper soil layers. As drought progressed further, the physiological activity of Juniperus plants nearly stopped while Pistacia plants were only slightly affected. Juniperus plants growing with Pistacia had stem-water isotopes that matched Pistacia, unlike values for isolated Juniperus plants. This result suggests that Pistacia shrubs supplied water to nearby Juniperus plants through hydraulic lift. This lifted water, however, did not appear to benefit Juniperus plants, as their physiological performance with co-occurring Pistacia plants was poor, including lower water potentials and rates of photosynthesis than isolated plants. Juniperus was more salt sensitive than Pistacia, which withstood salinity levels similar to that of groundwater. Overall, the different abilities of the two species to use salty water appear to drive the outcome of their interaction, resulting in asymmetric competition where Juniperus is negatively affected by Pistacia. Salt also seems to mediate the interaction between the two species, negating the potential positive effects of an additional water source via hydraulic lift.

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Section: Hydraulic Lift and Species Interactionssupporting

confidence: 93%

Hydraulic lift and tolerance to salinity of semiarid species: consequences for species interactions

et al. 2009

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“…Seed germination process in growth chamber was controlled on 23±2 o C, photoperiod of 18/6 (day/night) and relative humidity of 70±5% (Raina et al, 2013). Counting of germinated seeds starts from day 2 in a specific hour (Liopa-Tsakalidi et al, 2012) and at the end of the experiment, after 11 days, germination percentage (Liopa-Tsakalidi et al, 2012) germination rate (Pagter et al, 2009), mean germination time (Ellis and Roberts, 1981), mean of daily germination (Hoogenboom et al, 1987), daily germination speed (Stephanie et al, 2005), germination value (Ghasemi Gholozani and Dalil, 2011), germination energy (Panwar and Bhardwaj, 2005) and seed vigor index (Biradar et al, 2007) were calculated according to the equations in Table 1. Data analysis and comparison of evaluated parameters were done by SAS 9.1 and Duncan multiple range tests at 5%, respectively.…”

Section: Methodsmentioning

confidence: 99%

Determination of Optimum Duration and Concentration of Stevia (Stevia rebaudiana Bert.) Seed Priming with Boric Acid (H3BO3)

Shahverdi

Omidi

Tabatabaei

2017

Türkiye Tarımsal Araştırmalar Dergisi

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Abstract:In order to determine optimal duration and concentration of Stevia seed priming with boric acid for improving germination, an experimental factorial completely randomized design with three replications was conducted in the laboratory of Seed Science and Technology, Shahed University of Tehran in 2015. The first factor was different concentrations of boric acid (0, 0.5, 1.0, 1.5 and 2.0 percent) and the second factor was priming duration (0, 8, 16, 24 and 32 hours). Effects of concentration and priming duration with boric acid were significant on germination percentage, mean germination time, germination rate, germination energy, germination uniformity, mean daily germination, germination daily speed, germination value, seedling length and seed vigor index. The highest values for germination percentage, germination rate, germination energy, means of daily germination, germination value and seedling vigor index were observed after 24 hours of boric acid priming. The highest germination percentage, germination rate, germination potential, germination value and seed vigor index were obtained in 2.0% boric acid priming. 24 hours priming at 1.0% concentration of boric acid had the highest germination uniformity. The seedling length was highest in 24 hours priming at 1.5% concentration of boric acid. In general, Stevia seed priming with 1.5 to 2.0% of boric acid for 24 hours had positive effects on germination indexes and seedling growth.

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“…Also, germination uniformity was calculated using the Germin program (Soltani et al, 2001;Biradar et al, 2007;Pagter et al, 2009;Liopa-Tsakalidi et al, 2012).…”

Section: Germination Testsmentioning

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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Osmotic and ionic effects of NaCl and Na2SO4 salinity on Phragmites australis

Cited by 110 publications

References 35 publications

Hydraulic lift and tolerance to salinity of semiarid species: consequences for species interactions

Hydraulic lift and tolerance to salinity of semiarid species: consequences for species interactions

Determination of Optimum Duration and Concentration of Stevia (Stevia rebaudiana Bert.) Seed Priming with Boric Acid (H3BO3)

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

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