Water relations in <i>Azospirillum</i>-inoculated wheat seedlings under osmotic stress

Creus, Cecilia M.; Sueldo, Rolando J.; Barassi, Carlos A.

doi:10.1139/b97-178

Cited by 60 publications

(72 citation statements)

References 25 publications

(32 reference statements)

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“…K 2 O and NaCl were used as potassium standard and sodium standard, respectively. The level of phosphorus was measured by spectrophotometry (Creus et al, 2004), while the calcium content was determined based on the complex ometric titration method (uses the EDTA for titration and murexide as an indicator) (Bao, 1981). Contents of iron and zinc were determined by flame-atomic absorption spectroscopy (Celik et al, 2004).…”

Section: Element Content Evaluationsmentioning

confidence: 99%

Effects of iron nanoparticles on Mentha piperita L. under salinity stress

Askary¹,

Talebi²,

Amini³

et al. 2017

biologija

134

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The progress of nanotechnology presents many nanoparticles that are important in medicine, agriculture and industry. Quickly and entirely absorbed by plants, nano-compounds and remedy their nutrient deficiency and satisfy this need. Iron oxide nanoparticles with suitable surface chemistry can be used as a rich source of iron for plants due to its gradual release of Fe in a wide pH range (pH 3 to 11). The present study investigated the impact of iron oxide nanoparticles (Fe 2 O 3 NPs in 0, 10, 20 and 30 µM concentrations) on physiological parameters of peppermint (Mentha piperita) under salt stress (0, 50, 100 and 150 mM concentrations of NaCl). Fe 2 O 3 NPs caused increases in leaf fresh weight and dry weight, phosphorus, potassium, iron, zinc, and calcium contents of the peppermint under salinity stress but did not have an effect on the sodium element. 30 µM concentration of Fe 2 O 3 NP was more impressive. Lipid peroxidation and proline contents of the peppermint under salinity decreased significantly by applying Fe 2 O 3 NPs. The maximum activities of total antioxidant enzymes (I %), catalase, superoxide dismutase, and guailcol peroxidase were observed in plants treated with 150 mM of NaCl, but application of Fe 2 O 3 NPs declined these antioxidant activities. The results suggest that the appropriate concentration of iron nanoparticles could be used for stress resistance of the peppermint.

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Section: Element Content Evaluationsmentioning

confidence: 99%

Effects of iron nanoparticles on Mentha piperita L. under salinity stress

Askary¹,

Talebi²,

Amini³

et al. 2017

biologija

134

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“…H. seropedicae in wheat crops can substitute nitrogen fertilization, according to a greenhouse experiment (NEIVERTH et al, 2014). Moreover, A. brasilense decreased grain yield loss in wheat under salt and drought stresses (CREUS et al, 1997;CREUS et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Plant growth-promoting bacteria effect in withstanding drought in wheat cultivars

Furlan

Saatkamp

Volpiano

et al. 2017

RSA

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Resumo -Este trabalho avaliou genótipos de trigo em condições de escassez de água inoculados com Azospirillum brasilense e Herbaspirillum seropedicae, com e sem adubação nitrogenada. Para tanto, amostras para determinação do conteúdo relativo de água na folha (CRA) e do índice de estabilidade da membrana (IEM) foram coletadas no 1º e 8º dias de uma restrição total de água no estágio de emborrachamento. Além disso, os parâmetros de biomassa, nitrogênio total (NT) e produtividade foram determinados na colheita. Como resultado, os genótipos mostraram um desempenho distinto. Os dados de CRA e IEM revelaram que a inoculação de A. brasilense e H. seropedicae são capazes de conduzir o genótipo CD 120 à tolerância à seca. Além disso, o índice de grãos foi melhorado em todas as condições em que H. seropedicae estava presente em ambos os diferentes regimes de água. O H. seropedicae inoculado juntamente com adubo nitrogenado também aumentou o rendimento de grãos sob o regime de escassez de água. Além disso, A. brasilense inoculado com adubo nitrogenado foi capaz de melhorar a massa de 1000 grãos de plantas sob escassez de água. O cultivar Frontana exibiu a capacidade de manutenção do IEM e CRA apenas quando H. seropedicae ou ambas as bactérias mais adubo nitrogenado foram aplicados, no entanto, esta cultivar não apresentou diferenças em termos de massa fresca e seca da parte aérea e radicular, NT ou produtividade. Estes resultados apontaram H. seropedicae como promissora para inoculação em cereais e o CD120 como um bom modelo de planta para estudar a interação de plantas e bactérias.Palavras-Chave -status hídrico, associação planta-bactéria, rizobactérias. Abstract -This work evaluated wheat genotypes under water deficit inoculated with Azospirillum brasilense andHerbaspirillum seropedicae, with and without nitrogen fertilization. Samples of the plants were collected to evaluate its relative water content (RWC) and membrane stability index (MSI) at the 1 st and 8 th day of total water restriction at the booting stage. The plant biomass, total nitrogen (TN) and grain yield were determined at harvesting. The genotypes showed different performances. According to the results of RWC and MSI, inoculation with A. brasilense and H. seropedicae can make the cultivar CD-120 more tolerant to drought. Grain index was improved with H. seropedicae in all conditions and water regimes. H. seropedicae with nitrogen fertilization increased grain yield under water deficit. A. brasilense with nitrogen fertilization improved the 1000-grain weight of plants under water deficit. The cultivar Frontana maintained its cellular integrity and RWC with nitrogen fertilization combined with H. seropedicae and with both bacteria, however the shoot and root fresh and dry weights, TN and yield of this cultivar showed no differences. These results show the inoculation with H. seropedicae as promising to cereals, and the cultivar CD-120 as a good plant model to study plant-bacteria interaction.

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“…A. brasilense has been applied as an inoculant to improve the efficiency of crop cultivation of a wide variety of crops in different growth and climatic conditions (Okon and Labandera-Gonzales 1994). An improvement in the ability of water resource management in plants under osmotic stress was evident in wheat seedlings inoculated with A. brasiliense Sp245 (Creus et al 1998). In a study by Carletti (2002), PGPR strains (Azospirillum spp., Azotobacter spp., Bacillus spp., Bradyrhizobium spp., Pseudomonas spp.)…”

Section: Introductionmentioning

confidence: 99%

Improving micropropagation: effect ofAzospirillum brasilenseSp245 on acclimatization of rootstocks of fruit tree

Vettori

Russo

Felici

et al. 2010

Journal of Plant Interactions

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The effect of Azospirillum brasilense Sp245 on the micropropagation of three fruit rootstocks: Mr.S 2/5 plum (Prunus cerasifera )P. spinosa), GF 677 hybrid (Prunus persica )P. amigdalus), and MM 106 apple (Northen Spy )M1) was assessed. Rooted shoots were treated with 3 )10 7 of Sp245 cells during transplantation from in vitro cultures to the acclimatization phase. After 60 days, growth parameters were positively affected by Sp245 inoculum. In the case of Mr.S 2/5, an increase in rootstock stem length and node number by 37% and 42%, respectively, compared to the control was noted. In the case of GF 677, the bacterial inoculum increased stem length and node number by up to the 75% and 65%, respectively, compared to the control. The inoculum did not exert on MM 106 for both parameters suggesting that the effects of Sp245 could depend on a specific clonemicrobe association. In all cases, however, a higher vigor, consistent with a wider leaf area, was present in the inoculated plantlets demonstrating that the use of Azospirillum can significantly contribute to optimize plant performance during the phase of adaptation of plants to post-vitrum conditions.

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Water relations in Azospirillum-inoculated wheat seedlings under osmotic stress

Cited by 60 publications

References 25 publications

Effects of iron nanoparticles on Mentha piperita L. under salinity stress

Effects of iron nanoparticles on Mentha piperita L. under salinity stress

Plant growth-promoting bacteria effect in withstanding drought in wheat cultivars

Improving micropropagation: effect ofAzospirillum brasilenseSp245 on acclimatization of rootstocks of fruit tree

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