Salt tolerance ofElaeagnus macrophyllaandFrankiaEma1 strain isolated from the root nodules ofE. macrophylla

Tani, Chiharu; Sasakawa, Hideo

doi:10.1080/00380768.2000.10409158

Cited by 14 publications

(11 citation statements)

References 6 publications

(7 reference statements)

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“…The 40 mM NaCl treatment significantly decreased *Indicates a significant increase in protein accumulation (p<0.05) the establishment of the actinorhizal symbiosis in green alder species. These results corroborate previous findings that showed a decrease in actinorhizal plant growth, nodulation and nitrogen fixation in the presence of salinity [2,37,[40][41][42].…”

Section: Plant and Symbiosis Tolerance Screening And Nitrogen Fixationsupporting

confidence: 92%

“…As was previously observed in both actinorhizal and legume symbiosis [41,45], the results presented here suggest that Frankia alni is more tolerant to both salinity and NA than both of its host plants; this means that alder is the most sensitive symbiotic partner in this association. The effect on aerial biomass deposition of the inoculation of alders with Frankia alni alni ACN14a was positive.…”

Section: Plant and Symbiosis Tolerance Screening And Nitrogen Fixationsupporting

confidence: 88%

See 1 more Smart Citation

The Symbiosis between Frankia and Alder Shrubs Results in a Tolerance of the Environmental Stress Associated With Tailings from the Canadian Oil Sands Industry

Pl¹,

S²

2014

J Pet Environ Biotechnol

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Alders are well recognized for their ability to colonize the harsh environments created by either natural processes or human activity. They establish symbiosis with the actinomycete Frankia alni which supplies 70 to 100 % of the plant's nitrogen requirements. An important challenge facing the oil sands industry in Alberta, Canada, is management of the toxicity of Tailing Sands (TS) that are alkaline, saline and contain Naphthenic Acids (NA).In order to begin to understand how alders, Frankia alni and their symbiosis perform and adapt to these challenging environmental conditions, the tolerance of the microsymbiont (Frankia alni), the host plants (alders) and their symbiosis to specific compounds found in TS was studied. In addition, the metabolic response of Frankia alni ACN14a to the presence of NA was characterized. The Frankia alni strains tested tolerated both high pH and NA levels in addition to salts near or at the concentrations found in TS. Furthermore, actinorhizal symbiosis can establish itself under these conditions. NaCl was observed to exert the greatest stress on the establishment of symbiosis, decreasing the efficiency of the actinorhizal symbiosis. Inoculation of the alder plants with Frankia alni induced a significant increase in aerial biomass allocation. Finally, intracellular proteins in Frankia alni alni ACN14a whose expression level were influenced by naphthenic acids were identified. Together, these results demonstrate that actinorhizal alders show significant promise for use in the revegetation of lands affected by the mine tailings of the Canadian petroleum industry.

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Section: Plant and Symbiosis Tolerance Screening And Nitrogen Fixationsupporting

confidence: 92%

Section: Plant and Symbiosis Tolerance Screening And Nitrogen Fixationsupporting

confidence: 88%

The Symbiosis between Frankia and Alder Shrubs Results in a Tolerance of the Environmental Stress Associated With Tailings from the Canadian Oil Sands Industry

Pl¹,

S²

2014

J Pet Environ Biotechnol

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“…Similar results have been reported in actinorhizal plants under soil condition by Diem and Dommergues (1990), for C. glauca, C. obesa, and C. equisetifolia var. incana, and by Tani and Sasakawa (2000) for Elaeagnus macrophylla.…”

Section: Discussionmentioning

confidence: 99%

Influence of salt stress on inoculated Casuarina glauca seedlings

et al. 2016

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Salinity is a serious threat to agriculture in arid and semi-arid regions including Egypt. There is currently a need to select highly salt-tolerant plants to improve recycling of agricultural drainage waters. Due to the importance of Casuarina in soil reclamation and rehabilitation, our study was carried out to evaluate the survival and growth of inoculated Casuarina glauca in hydroponic N-free medium supplemented with different NaCl concentrations (50, 100, 200, 300, 400 and 500 mM). Salt tolerant Frankia strains CcI156 and CgIM4, isolated from root nodules of Casuarina trees grown in loamy sand soils in Egypt, were used for seedling inoculation. Our results showed that inoculated Casuarina seedlings were able to withstand up to 200 mM NaCl. At higher NaCl concentrations (300 to 500 mM), the seedling died gradually three days after exposure to salt stress. However, at lower NaCl (50 mM) concentration, inoculated C. glauca seedlings showed a higher growth rate and higher percentages of nodulation. Nitrogenase activity and the total nitrogen content of nodulated seedlings were also influenced by elevated NaCl concentrations and recorded a reduction at high concentration (200 mM). Salt stress had a strong effect on biosynthesis of osmoprotectants molecules like L-Proline and carbohydrates, which strongly correlated (r = 0.98 and 0.87, respectively) with increasing salt concentrations.

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“…The homogenates were centrifuged at 13,000 g for 15 min at 4°C and the supernatants were subjected to analysis. We used 100 µL of each supernatant for the determination of the Na + concentration, which was measured using a portable Na ion meter (CARDY C-122 Horiba Ltd, Kyoto, Japan), as described previously (Tani and Sasakawa 2000). The Na + concentration was calculated based on the water content of the plant tissues.…”

Section: Analyses Of Namentioning

confidence: 99%

Proline accumulates inCasuarina equisetifoliaseedlings under salt stress

Tani

Sasakawa

2006

Soil Science and Plant Nutrition

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The fresh weight of Casuarina equisetifolia seedlings decreased slightly with elevation of NaCl concentration in the culture solution. Na + concentration in the shoots gradually increased with increasing NaCl concentration in the culture solution and with increasing duration of the treatment. The Na + level reached 150 mmol L −1 in seedlings treated with 500 mmol L −1 NaCl for 6 weeks. The proline content of the shoots increased with increasing NaCl concentration in the culture solution and reached 13.5 µmol g −1 fresh weight in the seedlings treated with 500 mmol L −1 NaCl for 6 weeks. The Na + concentration and proline content in the roots also increased with NaCl treatment, but the level was considerably lower than that recorded in the shoots. A highly positive correlation between Na + concentration and proline content was observed in the shoots. These results strongly suggest that C. equisetifolia plants, which are highly tolerant to salt stress, primarily synthesize proline as a major compatible solute to adjust the osmotic pressure when Na + accumulates in the cells, and maintain cell homeostasis under salt-stress conditions.

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Salt tolerance ofElaeagnus macrophyllaandFrankiaEma1 strain isolated from the root nodules ofE. macrophylla

Cited by 14 publications

References 6 publications

The Symbiosis between Frankia and Alder Shrubs Results in a Tolerance of the Environmental Stress Associated With Tailings from the Canadian Oil Sands Industry

The Symbiosis between Frankia and Alder Shrubs Results in a Tolerance of the Environmental Stress Associated With Tailings from the Canadian Oil Sands Industry

Influence of salt stress on inoculated Casuarina glauca seedlings

Proline accumulates inCasuarina equisetifoliaseedlings under salt stress

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