Salinity tolerance and growth response of juvenile Oreochromis mossambicus at different salinity levels

2004 ◽  
Vol 3 (1) ◽  
pp. 53-55 ◽  
Author(s):  
Khalid Jamil ◽  
Muhammad Shoaib ◽  
Faisal Ameer ◽  
Hong Lin
Keyword(s):  
Salinity Tolerance ◽  
Growth Response ◽  
Oreochromis Mossambicus ◽  
Salinity Levels

scholarly journals Basil as Secondary Crop in Cascade Hydroponics: Exploring Salinity Tolerance Limits in Terms of Growth, Amino Acid Profile, and Nutrient Composition

Horticulturae ◽  
2021 ◽  
Vol 7 (8) ◽  
pp. 203
Author(s):  
Denisa Avdouli ◽  
Johannes F. J. Max ◽  
Nikolaos Katsoulas ◽  
Efi Levizou
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Salinity Tolerance ◽  
Total Concentration ◽  
Amino Acid Profile ◽  
Total Amino Acid ◽  
Cascade System ◽  
Hydroponic System ◽  
Salinity Levels ◽  
Use Efficiency

In a cascade hydroponic system, the used nutrient solution drained from a primary crop is directed to a secondary crop, enhancing resource-use efficiency while minimizing waste. Nevertheless, the inevitably increased EC of the drainage solution requires salinity-tolerant crops. The present study explored the salinity-tolerance thresholds of basil to evaluate its potential use as a secondary crop in a cascade system. Two distinct but complemented approaches were used; the first experiment examined basil response to increased levels of salinity (5, 10 and 15 dS m−1, compared with 2 dS m−1 of control) to identify the limits, and the second experiment employed a cascade system with cucumber as a primary crop to monitor basil responses to the drainage solution of 3.2 dS m−1. Growth, ascorbate content, nutrient concentration, and total amino acid concentration and profile were determined in both experiments. Various aspects of basil growth and biochemical performance collectively indicated the 5 dS m−1 salinity level as the upper limit/threshold of tolerance to stress. Higher salinity levels considerably suppressed fresh weight production, though the total concentration of amino acids showed a sevenfold increase under 15 dS m−1 and 4.5-fold under 5 and 10 dS m−1 compared to the control. The performance of basil in the cascade system was subject to a compromise between a reduction of fresh produce and an increase of total amino acids and ascorbate content. This outcome indicated that basil performed well under the conditions and the system employed in the present study, and might be a good candidate for use as a secondary crop in cascade-hydroponics systems.

scholarly journals Tolerance of Basil Genotypes to Salinity

2017 ◽  
Vol 9 (11) ◽  
pp. 283 ◽  
Author(s):  
Renata V. Menezes ◽  
André D. Azevedo Neto ◽  
Hans R. Gheyi ◽  
Alide M. W. Cova ◽  
Hewsley H. B. Silva
Keyword(s):  
Salinity Tolerance ◽  
Dry Matter ◽  
Membrane Integrity ◽  
Dry Mass ◽  
Ocimum Basilicum ◽  
Medicinal Species ◽  
Relative Water ◽  
Salinity Levels ◽  
Number Of Leaves ◽  
Inorganic Solutes

Basil (Ocimum basilicum L.) is a medicinal species of Lamiaceae family, popularly known for its multiple benefits and high levels of volatile compounds. The species is considered to be one of the most essential oil producing plants. Also cultivated in Brazil as a condiment plant in home gardens. The objective of this study was to evaluate the effect of salinity on the growth of basil in nutrient solution of Furlani and to identify variables related to the salinity tolerance in this species. The first assay was performed with variation of five saline levels (0 - control, 20, 40, 60 and 80 mM NaCl). In the second assay six genotypes were evaluated in two salinity levels 0 and 80 mM NaCl. The height, stem diameter, number of leaves, dry mass and inorganic solutes in different organs, photosynthetic pigments, absolute membrane integrity and relative water content were evaluated. All biometric variables in basil were significantly reduced by salinity. Dry matter yield and percentage of membrane integrity were the variables that best discriminated the characteristics of salinity tolerance among the studied basil genotypes. Basil genotypes showed a differentiated tolerance among the genotypes, the ‘Toscano folha de alface’ being considered as the most tolerant and ‘Gennaro de menta’ as the most sensitive, among the species studied.

scholarly journals Screening of jute and kenaf varieties for salinity tolerance

2018 ◽  
Vol 6 (2) ◽  
pp. 214
Author(s):  
Md. Isfatuzzaman Bhuyan ◽  
K M. Mehadi Hassan ◽  
Nowrose Jahan Lipi ◽  
Md Rafiq Uddin ◽  
Md Monirul Islam ◽  
...  
Keyword(s):  
Plant Height ◽  
Salinity Stress ◽  
Salinity Tolerance ◽  
Dry Weight ◽  
Germination Inhibition ◽  
Germination Test ◽  
Salinity Levels ◽  
Total Plant ◽  
Number Of Leaves ◽  
Total Dry Weight

A study was conducted in the Department of Agronomy, Bangladesh Agricultural University (BAU), Mymensingh from April to August 2012 to examine the salinity tolerance of eight jute varieties (CVE-3, C-83, CVL-1, BJC-7370, O-795, O-9897, OM-1, O-72) and two kenaf varieties (HC-95 and HC-2). Initially germination of these varieties were evaluated under six salinity levels viz. 0mM, 20mM, 40mM, 60mM, 80mM, and 100mM NaCl in the seed laboratory of the Department of Agronomy. Afterwards, all the varieties was grown in pots in the net house under four salinity levels viz. 0mM, 25mM, 50mM, and 75mM. The results from the germination study revealed that under control condition (0mM NaCl) all the jute varieties showed germination more than 80% both at 7 and at 14 days after seed sowing, whereas kenaf varieties had germination a little less than 80%. Among the jute varieties, O-72 showed the highest germination (92%), which was statistically similar with those of OM-1(91%), O-795 (90%), and C-83(87%). Salinity stress decreased germination drastically in all of the jute and kenaf varieties. A salinity level of 100mM caused the highest germination inhibition (74.70%) in jute variety CVL-1, which was very close to those of BJC-7370 and O-72. On the other hand, the lowest germination inhibition (51.11%) was recorded in jute variety O-795. The results of the pot trail showed that the plant characters of jute and kenaf varieties were affected significantly by salinity stress. All the varieties produced their respective plant height, number of leaves per plant, and plant dry weight under control condition (no salinity). Among these varieties, CVE-3 produced the highest plant height (145.2cm), and total dry weight (22.55g), whereas O-72 produced the highest number of leaves per plant (24.67). All these plant characters decreased sharply due to salinity stress irrespective of variety. However, the rate of decrease of plant characters occurred differentially in the jute and kenaf varieties. The highest rate of decrease in number of leaves (74.22%) was found from the variety CVE-3, whereas the lowest one was recorded from the variety HC-2 (51.68%). Salinity stress caused the highest decrease in total plant dry weight (73.68%) in the variety CVL-1 and plant height (73.64%) also in the variety CVL-1. On the contrary, the lowest decrease in plant dry weight (50.99%) was found in the variety O-9897 and plant height also in variety O-9897 (50.88%). Based on the results from germination test and pot trail, it can be inferred that jute variety O-9897 appeared to be the most salt tolerant followed by O-795, HC-2, HC-95, CVE-3, O-72, C-83, BJC-7370, OM-1, and CVL-1.    

scholarly journals (446) Salinity Tolerance of Eight Ornamental Herbaceous Perennials

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1034E-1035 ◽  
Author(s):  
Nickolee Zollinger ◽  
Teresa Cerny-Koenig ◽  
Roger Kjelgren ◽  
Rich Koenig ◽  
Kelly Kopp
Keyword(s):  
Salinity Tolerance ◽  
Growth Rates ◽  
Tap Water ◽  
Ornamental Plants ◽  
Visual Quality ◽  
Salinity Level ◽  
Salinity Treatment ◽  
Water Control ◽  
Herbaceous Perennials ◽  
Salinity Levels

Although salinity is becoming an increasing concern for landscape plants in many areas of the West, few studies have been carried out to evaluate salinity responses of ornamental plants, especially herbaceous perennials. We investigated salinity tolerance of four traditionally grown and four Intermountain West native ornamental herbaceous perennials. Penstemo×mexicali `Red Rocks', Leucanthemum×uperbum `Alaska', Echinacea purpurea, Lavandula angustifolia, Geranium viscosissimum, Eriogonum jamesii, Penstemon palmeri, and Mirabilismultiflora were irrigated with water containing a mixture of 2 CaCl2: 1 NaCl at salinity levels of 0.33 (tap water control), 2.2, 5.4, and 8.3 dS·m-1 for 8 weeks. Growth, visual quality, and gas exchange were assessed. Mirabilis multiflora and L.×uperbum `Alaska' showed high salt tolerance based on visual quality. No noticeable leaf necrosis was observed for either species at any salinity level. However, over the 8-week period, growth rates for L. superbumwere reduced by 35%, 58%, and 72% compared to the control for the 2.2, 5.4, and 8.3 dS·m-1 salinity levels, respectively. The decrease in growth did not reduce visual quality. Growth rates for M. multiflora were slightly higher than the control for the 2.2 and 5.4 dS·m-1 salinity levels and dropped about 20% at the highest salinity level. Echinaceapurpureashowed the lowest tolerance to salinity, as evidenced by substantial margin burn at all salinity levels as well as high mortality; all plants in the highest salinity treatment died.

scholarly journals SPOROBOLUS SPICATUS, A POTENTIAL TURF GRASS UNDER THE CLIMATIC CONDITIONS OF UAE

2018 ◽  
Vol 2 ◽  
pp. 1 ◽  
Author(s):  
Muhammad Zamin ◽  
Abdul Mateen Khattak ◽  
Mohammed A. Salem Alyafei ◽  
Muhammad Sajid ◽  
Muhammad Shakur ◽  
...  
Keyword(s):  
United Arab Emirates ◽  
Salinity Tolerance ◽  
Dry Weight ◽  
Climatic Conditions ◽  
Acceptable Level ◽  
Turf Grass ◽  
Leaf Colour ◽  
Salinity Levels ◽  
Tolerance To Salinity

Different accessions of Sporobolus spicatus were tested for the possible use in the landscaping sector of United Arab Emirates. In this regards, fifty accessions of S. spicatus were screened against five salinity levels of 15, 30, 45, 60 and 75dSm-1 at 3cm mowing height. Significant variations were found among the treatment for various characters of leaf colour, fresh and dry weight. Most of the accessions of the grass tolerated up to 45 dSm-1, without compromising on quality. Further increase in salinity, most of the accessions ceased to grow, except a few accessions which survived even at salinity levels of 75dSm-1. Many of the grasses exhibit better performance than Paspalam vaginatum, the prevailing commercial turf grass in UAE (used as control in this instance). As a whole accessions 45S, 18S, 35S and 37S showed salinity tolerance at 3cm mowing height and maintaining quality up to the acceptable level. Based on their tolerance to salinity and better performance, these accessions are recommended for turf use in public landscaping.

scholarly journals Amelioration of Salinity Tolerance in Foxtail Millet by Applying Plant Growth Regulators

2020 ◽  
Vol 22 (2) ◽  
pp. 25-39
Author(s):  
D Biswas ◽  
MA Mannan ◽  
MA Karim ◽  
MY Miah
Keyword(s):  
Humic Acid ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Salinity Tolerance ◽  
Growth Regulators ◽  
Foxtail Millet ◽  
Growth And Yield ◽  
Spad Value ◽  
Randomized Design ◽  
Salinity Levels

A pot experiment was laid down at the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur from November 2018 to March 2019 to improving the salinity tolerance in Foxtail millet (BARI Kaon 1) using different plant growth regulators with different doses. Two salinity levels, i) control (0mM NaCl) and ii) 80 mMNaCl were maintained after 14 days of sowing to harvest. The plant growth regulators i) Humic acid (HA): a) @ 5 gL-1 water b) @ 10 gL−1water ii) Gibberellic acid (GA3): a) @10 g L-1water b) @20 g L-1water iii) Salicylic acid (SA): a) @ 50 g L-1water b) @ 100 g L-1water were sprayed at 7 days interval from salt imposition. The experiment was in a completely randomized design (CRD) with three replications. Results revealed that plant growth regulators improved the growth and yield performance of Foxtail millet under both control and saline conditions. Amelioration of salinity tolerance in Foxtail millet was well associated with lower proline content, higher chlorophyll content and SPAD value as well as dry matter production, which facilitated the Foxtail millet yield due to application of plant growth regulators. Among the plant growth regulators, humic acid (HA) @ 5 g L-1 water was the best treatment to improving the salinity tolerance in foxtail millet under saline condition. Bangladesh Agron. J. 2019, 22(2): 25-39

Comparative salinity tolerance of two legumes, Vigna luteola and Vigna vexillata, from the coast of Trinidad

1994 ◽  
Vol 72 (8) ◽  
pp. 1216-1221 ◽  
Author(s):  
O. T. Okusanya ◽  
O. Oyesiku
Keyword(s):  
Salinity Tolerance ◽  
Sea Water ◽  
Dry Weight ◽  
Sodium Content ◽  
Root Weight ◽  
Growth Responses ◽  
Vigna Vexillata ◽  
Salinity Levels ◽  
Total Plant ◽  
Vigna Luteola

The germination and growth responses of two legumes, Vigna luteola and Vigna vexillata, to different salinity levels were compared in laboratory experiments. Vigna luteola seeds tolerated a higher level of salinity and germinated significantly better at high salinities than corresponding results for V. vexillata. Seedlings of V. luteola exhibited a significant increase in dry weight at 10% sea water followed by a significant decrease at 30% seawater and above. Vigna vexillata seedlings showed a gradual decrease in dry weight with increased salinity. Except at 0% seawater, dry weights of V. luteola seedlings were significantly higher than those of V. vexillata at all salinities tested. The proportion of root weight to total plant dry weight increased with increased salinity in V. luteola; the reverse was the case in V. vexillata. In both species, increased salinity resulted in increased sodium content but decreased potassium and calcium contents. While the sodium content of the shoot of V. vexillata was higher than that of V. luteola, the amount in the roots of V. luteola was higher. The potassium and calcium contents were higher in V. luteola than in V. vexillata and the sodium to potassium ratio values were lower in V. luteola than in V. vexillata. The results are compared with those of other legumes and discussed in relation to the habitats of the species, the characteristics of halophytes, and the uses which these legumes may have in salt-enriched lands. Key words: salinity, tolerance, germination, growth, Vigna.

scholarly journals Comparative physiological and biochemical mechanisms of salt tolerance in five contrasting highland quinoa cultivars

2020 ◽  
Author(s):  
Zhiquan Cai ◽  
Qi Gao
Keyword(s):  
Salt Tolerance ◽  
Seed Germination ◽  
Salinity Tolerance ◽  
Plant Traits ◽  
Soluble Sugar ◽  
Ion Homeostasis ◽  
Plant Size ◽  
Antioxidant Enzyme Activities ◽  
Inorganic Ion ◽  
Salinity Levels

Abstract Background: Chenopodium quinoa Willd., a halophytic crop, shows great variability among different genotypesin response to salt. To investigate the salinitytolerance mechanisms, five contrasting quinoa cultivars belonging to highland ecotype were compared for their seed germination (under 0, 100 and 400 mM NaCl) and seedling’s responses under five salinity levels (0, 100, 200, 300 and 400 mM NaCl). Results: Substantial variations were found in plant size (biomass) and overall salinity tolerance (plant biomass in salt treatment as % of control) among the different quinoa cultivars. Plant salinity tolerance was negatively associated with plant size, especially at lower salinity levels (<300 mM NaCl), but salt tolerance between seed germination and seedling growth is was not closely correlated. Except for shoot/root ratio, all measured plant traits responded to salt in a genotype-specific way. Salt stress resulted in decreased plant height, leaf area, root length, and root/shoot ratio in each cultivar. With increasing salinity levels, leaf superoxide dismutase (SOD) activity and lipid peroxidation generally increased, but catalase (CAT) and peroxidase (POD) activities showed non-linear patterns. Organic solutes (soluble sugar, proline and protein) accumulated in leaves, whereas inorganic ion (Na + and K + )increased but K + /Na + decreased in both leaves and roots. Across different salinity levels and cultivars, without close relationships with antioxidant enzyme activities (SOD, POD, or CAT), salinity tolerance was significantly negatively correlated with leaf organic solute and malondialdehyde contents in leaves and inorganic ion contents in leaves or roots ( not except for root K + content), but positively correlated with K + /Na + ratio in leaves or roots. Conclusion: Our results establish indicate ed that leaf osmoregulation, K + retention, Na + exclusion, and ion homeostasis are the main physiological mechanisms conferring salinity tolerance of these cultivars, rather than the regulations of leaf antioxidative ability.As an index of salinity tolerance, K + /Na + ratio in leaves or roots can be used for the selective breeding of highland quinoa cultivars.

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