Effects of salinity and N on the growth, photosynthesis and N status of olive (Olea europaea L.) trees

Tabatabaei, S J

doi:10.1016/j.scienta.2006.02.016

Cited by 91 publications

(47 citation statements)

References 28 publications

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“…The higher concentration both NaCl and KN impaired the growth of the plants. These imply that under salinity conditions plant demands higher K and N in order to cope with salinity stress as it has been reported [2,31,38] .…”

Section: ) Leaf Area Index Root Volume (Ml) -------------------------supporting

confidence: 57%

Foliar and Soil Application of Potassium Nitrate Affects the Tolerance of Salinity and Canopy Growth of Perennial Ryegrass (Lolium perenne var Boulevard)

Tabatabaei¹,

Fakhrzad²

2008

American J. of Agricultural and Biological Sciences

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Abstract:Two experiments were conducted to determine the effect of KNO3 application on perennial ryegrass salinity tolerance. Two NaCl levels (0 and 60 mM) factorially combined with four KNO3 (KN) levels (0, 5, 10 and 15 mM) as the treatments. The KN was applied either to the soil or foliarly sprayed. The results showed that in both experiments the increased salinity significantly reduced the vegetative characteristics of ryegrass. In the salinity treatment, supplying KN at 10 mM concentraion increased the fresh and dry weight as well leaf area, however, the growth of the plants was lower at the 0 and 15 mM concentration of KN. The concentration of N, NO3, P and K was reduced in the salinity treatments, but the concentration of Na and Cl was increased. Salinity (NaCl60) significantly reduced the K/Na ratio, while it was increased when the KN was increased in the solution. The concentration of Cl was significantly reduced when KN increased in the solution so that its concentration in NaCl60 and 0 mM KN was 75% in soil and 66.6% in foliar sprays treatment, respectively, higher than that in NaCl60 and 15 mM treatment. Combination of both salinity and KN concentration remarkably increased the proline content. The concentration of chlorophyll was reduced in NaCl60 treatment however; additional supplying of KN increased the chlorophyll concentration. In NaCl60 treatment, the highest survival plants were observed at 10 mM KN as either foliar or soil application. It seems that the reduced Cl concentration, increased proline and K/Na ratio were the main reason for the improved tolerance for salinity of the perennial ryegrass in the 10 mM KN concentration.

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Section: ) Leaf Area Index Root Volume (Ml) -------------------------supporting

confidence: 57%

Foliar and Soil Application of Potassium Nitrate Affects the Tolerance of Salinity and Canopy Growth of Perennial Ryegrass (Lolium perenne var Boulevard)

Tabatabaei¹,

Fakhrzad²

2008

American J. of Agricultural and Biological Sciences

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“…Among the several constrains which limit rice cultivation, salinity is the one that has profound effect in curbing the rice productivity globally. Salinity stress, in mild form, reduces overall plant growth; and an excess level leads to the enhancement of cell death (Ayala-Astorga and Alcaraz-Melendez 2010), which contributes 5 % of the crop loss (Tabatabaei 2006). Among the two types of salinity, inland salinity is due to irrigation practices with sub-standard quality water (Chinnusamy et al 2005), whereas coastal salinity occurs due to inflow of ocean water in the coastal region.…”

Section: Introductionmentioning

confidence: 99%

Assessment of genetic diversity of Saltol QTL among the rice (Oryza sativa L.) genotypes

Ganie

Borgohain

Kritika

et al. 2016

Physiol Mol Biol Plants

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Eight Saltol quantitative trait locus (QTL) linked simple sequence repeat (SSR) markers of rice (Oryza sativa L.) were used to study the polymorphism of this QTL in 142 diverse rice genotypes that comprised salt tolerant as well as sensitive genotypes. The SSR profiles of the eight markers generated 99 alleles including 20rare alleles and 16 null alleles. RM8094 showed the highest number (13) of alleles followed by RM3412 (12), RM562 (11), RM493 (9) and RM1287 (8) while as, RM10764 and RM10745 showed the lowest number (6) of alleles. Based on the highest number of alleles and PIC value (0.991), we identified RM8094 as suitable marker for discerning salt tolerant genotypes from the sensitive ones. Based upon the haplotype analysis using FL478 as a reference (salt tolerant genotypes containing Saltol QTL), we short listed 68 rice genotypes that may have at least one allele of FL478 haplotype. Further study may confirm that some of these genotypes might have Saltol QTL and can be used as alternative donors in salt tolerant rice breeding programmes.

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“…Contudo, quando a concentração de NO 3 -foi menor que 2,5 mM, os teores desse íon nas raízes, em condições de salinidade, permaneceram menores que aqueles observados nas condições controle (Figura 2f ). Alguns trabalhos revelaram que o aumento da disponibilidade de N não infl uenciou os teores de K + (Tabatabaei, 2006;Ding et al, 2010), enquanto outros observaram que a absorção de K + dependeu do suprimento de N, o que foi verifi cado tanto em condições-controle quanto de salinidade (Barhoumi et al, 2010). A manutenção dos teores de K + é sugerida como um mecanismo comum de proteção contra os efeitos tóxicos dos sais, uma vez que a manutenção de altas concentrações de K + no citosol é requerida para uma homeostase iônica celular adequada (Munns e Tester, 2008;Rodrigues et al, 2013).…”

Section: Resultsunclassified

“…A salinidade interfere na aquisição e na utilização do N. Assim, condições de salinidade podem influenciar a absorção, distribuição e assimilação do N, assim como a síntese de proteínas (Abd-El Baki et al, 2000;Ebert et al, 2002;Debouba et al, 2006;Tabatabaei, 2006;Aragão et al, 2010). De maneira geral, solos salinizados são deficientes em N e, dessa forma, a baixa disponibilidade desse elemento tem sido sugerida como um dos principais fatores responsáveis pela redução do crescimento das plantas em condições de salinidade (Fageria et al, 2011).…”

Section: Introductionunclassified

Nitrato modula os teores de cloreto e compostos nitrogenados em plantas de milho submetidas à salinidade

Feijão

Marques

Silva³

et al. 2013

Bragantia

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ResumoO objetivo deste trabalho foi estudar o efeito do nitrato no crescimento e no acúmulo de solutos inorgânicos e orgâ-nicos em plantas de milho submetidas à salinidade. O delineamento experimental foi o inteiramente casualizado, com cinco repetições, sob esquema fatorial 2×4, constando de oito tratamentos: dois níveis de salinidade (NaCl a 0 e 75 mM) e quatro concentrações de NO 3 -(0,5; 2,5; 5,0 e 7,5 mM) em sistema hidropônico. A massa seca da parte aérea e das raízes foi reduzida pela salinidade, porém isso foi menos evidente quando as plantas foram submetidas a concentrações de NO 3 -abaixo de 2,5 mM. O melhor crescimento das plantas foi observado na concentração aproximada de NO 3 -a 5,0 mM. Os teores de Na + e Cl -aumentaram com a salinidade em todos os órgãos estudados, havendo maior acúmulo desses íons nas raízes. De modo geral, os teores de K + foram pouco afetados por esse estresse. Com o aumento da concentração de NO 3 -no meio, houve melhora na absorção desse íon, levando à redução da absorção de Cl -e ao acúmulo de prolina e N-aminossolúveis. O estresse nutricional é mais limitante ao crescimento das plantas de milho que o estresse salino, cujos efeitos prejudiciais são minimizados por uma nutrição de NO 3 -adequada.Palavras-chave: estresse salino, nitrogênio, solutos inorgânicos e orgânicos, Zea mays. Nitrate modulates the contents of chloride and N-compounds in maize plants under salinity AbstractThis work aimed to study the effect of nitrate (NO 3 -) on growth and accumulation of inorganic and organic solutes in maize plants subjected to salinity. The experiment was carried out in a completely randomized design, with five replications, and a 2×4 factorial scheme, consisting of eight treatments: two salinity levels (NaCl at 0 or 75 mM) and four different concentrations of NO 3 -(0.5, 2.5, 5.0 or 7.5 mM) in nutrient solution. The dry mass of shoots and roots was reduced by salinity, however, this was less evident when plants were exposed to concentrations of NO 3 -below 2.5 mM. The best growth was observed in the approximate concentration of 5.0 mM NO 3 -. The Na + and Cl -contents increased with salinity in all organs studied, and the highest accumulation of these ions was observed in the roots. In general, the K + content was not severely affected by this stress. With the increase of NO 3 -concentration in the medium, there was an improvement in the absorption of this ion, leading to reduced uptake of Cl -and the accumulation of proline and soluble amino acids. Nutritional stress is more limiting to plant growth of maize than the salt stress, with harmful effects being alleviated by an adequate nutrition of NO 3 -.

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Effects of salinity and N on the growth, photosynthesis and N status of olive (Olea europaea L.) trees

Cited by 91 publications

References 28 publications

Foliar and Soil Application of Potassium Nitrate Affects the Tolerance of Salinity and Canopy Growth of Perennial Ryegrass (Lolium perenne var Boulevard)

Foliar and Soil Application of Potassium Nitrate Affects the Tolerance of Salinity and Canopy Growth of Perennial Ryegrass (Lolium perenne var Boulevard)

Assessment of genetic diversity of Saltol QTL among the rice (Oryza sativa L.) genotypes

Nitrato modula os teores de cloreto e compostos nitrogenados em plantas de milho submetidas à salinidade

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