Salt Tolerant Rhizobacteria: For Better Productivity And Remediation Of Saline Soils

Salt-tolerant turfgrass is highly desirable in areas associated with saline soils or saline irrigation waters. To determine the salt tolerance of 14 saltgrass [Distichlis spicata var. stricta (Greene)] selections, two greenhouse studies were conducted by means of a hydroponic culture system. Five salinity levels (from 2 to 48 dS·m−1) were created with ocean salts. In general, turf quality decreased and leaf firing increased as salinity increased. However, varying levels of salt tolerance were observed among selections based on leaf firing, turf quality, root growth, and clipping yield. Selections COAZ-01, COAZ-18, CO-01, and COAZ-19 exhibited the best turf quality and the least leaf firing at 36 and 48 dS·m−1 salinity levels in both Experiments 1 and 2. At the highest salinity level (48 dS·m−1), COAZ-18 and COAZ-19 exhibited the highest root activity among all accessions. Salinity levels that caused 25% clipping reduction ranged from 21.2 to 29.9 dS·m−1 and were not significantly different among entries. The data on 25% clipping reduction salinity of saltgrass generated in this study rank saltgrass as one of the most salt-tolerant species that can be used as turf.

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Responses of Foreign GA3 Application on Seedling Growth of Castor Bean (Ricinus communis L.) under Salinity Stress Conditions

Agronomy ◽

10.3390/agronomy9060274 ◽

2019 ◽

Vol 9 (6) ◽

pp. 274

Author(s):

Xiurong Jiao ◽

Wenfang Zhi ◽

Guijuan Liu ◽

Guanglong Zhu ◽

Gongneng Feng ◽

...

Keyword(s):

Plant Height ◽

Seedling Growth ◽

Castor Bean ◽

Ricinus Communis ◽

Proline Content ◽

Stem Diameter ◽

Saline Soils ◽

Salt Tolerant ◽

Marginal Lands ◽

Ricinus Communis L

Castor bean (Ricinus communis L.), a promising bioenergy crop, is readily planted in marginal lands like saline soils. A controlled experiment was conducted to explore the possibility of using gibberellic acid (GA3) as a promoter for caster bean grown under NaCl conditions and to try to determine the most appropriate concentration of GA3 for seedling growth. The seeds of salt-tolerant cultivar Zibi 5 were firstly soaked with 0, 200, 250, and 300 µM GA3 for 12 h and then cultured with 1/2 Hoagland solution containing 0, 50, and 100 mM NaCl in pots filled with sand. Plant height, stem diameter, leaf area, dry mater of each organ, activity of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT), soluble protein, and proline content in the leaves were examined. Plant height and stem diameter, SOD, and POD activity was significantly highest in the treatment of 250 µM GA3 under salt concentration of 50 mM NaCl among all the testing days; protein content was highest when GA3 concentration was 250 µM under 100 mM NaCl treatment. This indicated that caster bean seed soaking with 250 µM GA3 could be the most suitable concentration for promoting seedling growth of caster bean, improving their stress resistance.

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Putting halophytes to work – genetics, biochemistry and physiology

Functional Plant Biology ◽

10.1071/fpv40n9_fo ◽

2013 ◽

Vol 40 (9) ◽

pp. v ◽

Cited By ~ 10

Author(s):

Bernhard Huchzermeyer ◽

Tim Flowers

Keyword(s):

Salt Tolerance ◽

Small Group ◽

Economic Importance ◽

Saline Soils ◽

Special Issue ◽

Salt Tolerant ◽

Cost Action ◽

Genes To Ecosystems ◽

The Cost

Halophytes are a small group of plants able to tolerate saline soils whose salt concentrations can reach those found in ocean waters and beyond. Since most plants, including many of our crops, are unable to survive salt concentrations one sixth those in seawater (about 80 mM NaCl), the tolerance of halophytes to salt has academic and economic importance. In 2009 the COST Action Putting halophytes to work – from genes to ecosystems was established and it was from contributions to a conference held at the Leibniz University, Hannover, Germany, in 2012 that this Special Issue has been produced. The 17 contributions cover the fundamentals of salt tolerance and aspects of the biochemistry and physiology of tolerance in the context of advancing the development of salt-tolerant crops.

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Salt-Tolerant Plant Growth Promoting Rhizobacteria for Enhancing Crop Productivity of Saline Soils

Frontiers in Microbiology ◽

10.3389/fmicb.2019.02791 ◽

2019 ◽

Vol 10 ◽

Cited By ~ 30

Author(s):

Dilfuza Egamberdieva ◽

Stephan Wirth ◽

Sonoko Dorothea Bellingrath-Kimura ◽

Jitendra Mishra ◽

Naveen K. Arora

Keyword(s):

Plant Growth ◽

Plant Growth Promoting Rhizobacteria ◽

Crop Productivity ◽

Saline Soils ◽

Salt Tolerant ◽

Tolerant Plant ◽

Plant Growth Promoting ◽

Growth Promoting

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Can reclaimed land be converted to arable land? –Positive: Evidences of soil microbial activity from a laboratory experiment

10.5194/egusphere-egu2020-6499 ◽

2020 ◽

Author(s):

Ruirui Chen ◽

Jianwei Zhang ◽

Youzhi Feng

Keyword(s):

Microbial Activity ◽

Community Composition ◽

Metabolic Activity ◽

Soil Microorganisms ◽

Land Reclamation ◽

Arable Land ◽

Saline Soils ◽

Salt Tolerant ◽

Soil Microbial ◽

Tolerant Species

Agriculture is a drive for land reclamation. Reclaiming coastal saline soils is increasingly undertaken as water and heat resources are normally plentiful in coastal land. However, growth of both crops and soil microorganisms is limited due to high cation content and osmotic stress, making saline soils unproductive when converted to arable land. For crops, great efforts have to be made to screen salt-tolerant species suitable for land reclamation. For soil microorganisms in saline soils, will the same separation and domestication of salt-tolerant species be necessary to improve microbial activity as done with crops?To improve such understandings, we studied coastal saline soils covering non-, mild-, and severe-salinity. Their bacterial diversities were characterized by high throughput sequencing, and microbial metabolic activities analyzed with substrate-induced heat release curves. Abundant and diverse bacterial communities were detected in the severe-salinity soils. While we did not observe soil salinity significantly affected the microbial richness, it did shift soil bacterial community composition. However, the severe-salinity soil was not dominant with salt-tolerant microbial species. With thermodynamic analysis, we discovered glucose amendment efficiently promoted microbial metabolic activity regardless of their community composition. Severe salinity did not inhibit potential metabolic activity of soil microbial community. A further 2-month incubation experiment supported that microbial metabolic kinetics of the severe-salinity soil amended with maize straw recovered and moved toward to the non-salinity soil.Therefore, our study supported that salt-tolerant species are not indispensable in land reclamation. An addition of labile organic amendments can help to rapidly multiply microbial growth and recover soil microbial functions.

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The Mallen Niche Seeder for Plant Establishment on Difficult Sites.

The Rangeland Journal ◽

10.1071/rj9810106 ◽

1981 ◽

Vol 3 (1) ◽

pp. 106 ◽

Cited By ~ 11

Author(s):

CV Malcolm ◽

RJ Allen

Keyword(s):

Field Trials ◽

Saline Soils ◽

Plant Establishment ◽

Salt Tolerant ◽

Bitumen Emulsion

The Mallen Niche Seeder, is designed for establishinz salt tolerant forage shrubs on saline soils. In one operation the Seeder makes a furrow and bank, presses a V-shaped niche on the bank and deposits seeds covered with mulch and/or sprayed with latex or bitumen emulsion at intervals in the niche. Field trials indicate that the Seeder has application for saline soils in the agricultural and pastoral areas.

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Characteristics of coastal saline soils inhabiting halophytes and salt tolerant plants

Journal of Soil and Water Conservation ◽

10.5958/2455-7145.2018.00016.4 ◽

2018 ◽

Vol 17 (1) ◽

pp. 107

Author(s):

Sanjay Arora ◽

Riddhi Mehta

Keyword(s):

Saline Soils ◽

Salt Tolerant ◽

Tolerant Plants

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A novel flood management strategy to plan eco-industry development in areas of coastal land-subsidence in Taiwan

Canadian Journal of Civil Engineering ◽

10.1139/l10-001 ◽

2010 ◽

Vol 37 (4) ◽

pp. 553-561 ◽

Cited By ~ 1

Author(s):

Hui-Chen Su ◽

Hau-I Lin

Keyword(s):

Land Subsidence ◽

Management Strategy ◽

Ground Surface ◽

Flood Management ◽

Saline Soils ◽

Salt Tolerant ◽

Rural Regions ◽

Novel Concept ◽

Coastal Land ◽

Wetland Habitats

Because of limited freshwater resources, urban and industrial areas in Taiwan are often given priority for allocation of water resources. Accordingly, residents in rural regions usually pump groundwater for irrigation and daily needs. Continuous land subsidence has resulted in the elevation of the ground surface to be lower than the sea level, which has led to frequent flooding and created wetland habitats. In addition, seawater intrusion has damaged the soil, which has made the land difficult to farm. This study proposes a novel concept called the Island Lake Eco-town Program that would send the surface runoff from stormwater into a flood buffer wetland through land elevation modification and the necessary levee construction. Except for the use of stormwater to leach salt from the soil, we propose growing salt tolerant crops. Yunlin County of Taiwan has been selected as a study area to evaluate the feasibility of the proposed method. This study also demonstrated how to evaluate the available production of rice growth in saline soils.

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