scholarly journals Influence of salt stress on ecophysiological parameters of Periploca sepium bunge

2011 ◽  
Vol 57 (No. 4) ◽  
pp. 139-144 ◽  
Author(s):  
J.K. Sun ◽  
T. Li ◽  
J.B. Xia ◽  
J.Y. Tian ◽  
Z.H. Lu ◽  
...  
Keyword(s):  
Salt Stress ◽  
Yellow River ◽  
Growth Parameters ◽  
Nacl Stress ◽  
Salinity Treatment ◽  
Low Salinity ◽  
Maximum Value ◽  
Salinity Levels ◽  
Use Efficiency ◽  
Periploca Sepium

An experiment was carried out to investigate the effect of salt stress on Periploca sepium Bunge seedlings using three levels of salinity, 50 mmol/L, 100 mmol/L, and 200 mmol/L sodium chloride (NaCl) solution. The results showed that growth parameters and net photosynthetic rate (P<sub>n</sub>), stomatal conductance (G<sub>s</sub>) of Periploca sepium Bunge were enhanced under low salinity levels (50 mmol/L NaCl), which reduced strongly with increasing salinity levels. Under 100 mmol/L NaCl and 200 mmol/L NaCl stress, the decline of P<sub>n</sub> was mainly caused by non-stomatal factors. The water use efficiency (WUE), apparent light use efficiency (LUE), carboxylation efficiency (CUE) were enhanced under low salinity levels (50 mmol/L NaCl), the maximum value of WUE was observed at 100 mmol/L NaCl, the minimum value of WUE was observed at 200 mmol/L NaCl, the LUE, CUE were reduced by 52% and 47%, at 200 mmol/L NaCl, respectively, compared to control. Activities of the antioxidative enzymes superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were enhanced by low salinity treatment (50 mmol/L NaCl), but CAT activity decreased at 200 mmol/L NaCl stress. Malondialdehyde (MDA) was non-significant compared to the control under low salinity levels (50 mmol/L NaCl), the maximum value was observed at 200 mmol/L NaCl. These results suggest a possibility to improve saline soil utilization of Periploca sepium Bunge in Yellow River Delta region.

Effect of Sodium Chloride on Growth, Gas Exchange, Protective Enzyme of Periploca Sepium Bunge

2012 ◽  
Vol 500 ◽  
pp. 130-135
Author(s):  
Jing Kuan Sun ◽  
Zhao Hua Lu ◽  
Tian Li ◽  
Jia Yi Tian
Keyword(s):  
Yellow River ◽  
Growth Parameters ◽  
Yellow River Delta ◽  
Nacl Stress ◽  
Low Salinity ◽  
Protective Enzyme ◽  
Salinity Levels ◽  
Use Efficiency ◽  
The Common ◽  
Periploca Sepium

Periploca sepium Bunge. was tested for salinity tolerance in pot experiments using three levels of salinity, 50, 100, and 200mmol/L.It was observed that the plant growth parameters and net photosynthetic rate (Pn), stomatal conductance (Gs) were enhanced under low salinity levels (50mm/L NaCl.),which reduced strongly with increasing salinity levels. Under 100mmol/L NaCl and 200mmol/L NaCl stress, the decline of Pn was mainly caused by non-stomatal factors.The water use efficiency (WUE), apparent light use efficiency (LUE) , apparent CO2 use efficiency (CUE) were enhanced under low salinity levels (50mm/L NaCl.), the maximum WUE was observed at 100mmol/L NaCl, the minimum WUE was observed at 200mmol/L NaCl, the LUE, CUE were reduced repectively by 52%,47% at 200mmol/L NaCl compared to control.Activities of the antioxidive enzymes superoxide dismutase (SOD), peroxidase (POD),and catalase (CAT) were enhanced by salts treatment (50mm/L NaCl.), but CAT activity decreased under 200 mmol/L NaCl salt stress. Malondialdehyde (MDA) concentration was non-significant versus the control under low salinity levels (50mm/L NaCl.),the largest concentration exposing to 200 mmol/L NaCl. These results suggest a possible use of Periploca sepium Bunge in Yellow River Delta regions,where salinity is often the common major abiotic stress for plants.

scholarly journals Effect of salt stress on some sweet corn (Zea mays L. var. saccharata) genotypes

2015 ◽  
Vol 67 (3) ◽  
pp. 993-1000 ◽  
Author(s):  
Lydia Shtereva ◽  
Roumiana Vassilevska-Ivanova ◽  
Tanya Karceva
Keyword(s):  
Zea Mays ◽  
Salt Stress ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Growth Parameters ◽  
Dry Weight ◽  
Germination Percentage ◽  
F1 Hybrid ◽  
Salt Stress Condition ◽  
Salinity Levels

An experiment was carried out hydroponically under laboratory conditions to investigate the effect of salt stress on several physiological and biochemical parameters of three sweet corn (Zea mays L. var. saccharata) genotypes: lines 6-13, C-6 (pollen source) and their heterotic F1 hybrid ?Zaharina?. The degree of salinity tolerance among these genotypes was evaluated at three different sodium chloride (NaCl) concentrations: 0 mM, 100 mM, 125 mM and 150 mM. Seed germination, plant growth and biochemical stress determining parameters such as malondialdehyde (MDA), proline content and hydrogen peroxide (H2O2) levels were compared between seedlings of lines and hybrid. The obtained results indicated that both lines and hybrid have similar responses at different salinity levels for all examined traits. All the seedlings? growth parameters, such as germination percentage, root length, shoot length, root and shoot fresh and dry weight, decreased with increasing salinity level. MDA, proline and H2O2 increased at different saline conditions in comparison to the control. Based on the results, of the three genotypes examined, the hybrid Zaharina, followed by line C-6, was more salt-sensitive than line 6-13 in salt stress condition.

Interactive Effects of Salinity and Elevated CO2 on Ecophysiological Function of Euhalophyte Suaeda salsa

2011 ◽  
Vol 361-363 ◽  
pp. 90-93
Author(s):  
Zhao Xiang Han ◽  
Gui Quan Han ◽  
Zhang Meng ◽  
Chun Xia Lv
Keyword(s):  
Salt Stress ◽  
Osmotic Adjustment ◽  
Soluble Sugar ◽  
Nacl Stress ◽  
Interactive Effects ◽  
Concentration Increase ◽  
Total Soluble Sugar ◽  
Nacl Concentration ◽  
Salinity Levels ◽  
Leaves And Roots

This study was aimed at obtaining detailed information about the interaction of NaCl salinity and elevated atmospheric CO2concentration in the halophyte S.salsa, which was irrigated with five different salinity levels under ambient and elevated (530 ppm) CO2. The results show that total soluble sugar concentration was significantly increased by salt-treatments in both leaves and roots, and that the most progressive sugar increments were observed in leaves and roots of S. salsa under the elevated CO2. The Na+ concentration in the leaves and roots increased with the increased NaCl concentration, the K+ accumulation gradually decreaed by increasing salinity levels in leaves and roots. Proline increased in response to salt stress along with incremental NaCl concentration. The GB concentrations of leaves were significantly raised as NaCl levels increased. Electrolyte leakage increased in the leaves of S. salsa grown under NaCl stress. ψs of leaves and roots decreased as the NaCl concentration increase, and that elevated CO2both had markedly greater effects on ψs of leaves and roots. The osmotic adjustment values ascended with elevated CO2concentration in both leaves and roots.

scholarly journals Germination and seedling growth of indigenous aman rice under salt stress

2017 ◽  
Vol 15 (2) ◽  
pp. 182-187
Author(s):  
D Das ◽  
MA Ali ◽  
TA Sarkar ◽  
MY Ali
Keyword(s):  
Salt Stress ◽  
Seedling Growth ◽  
Growth Parameters ◽  
Development Program ◽  
Germination Capacity ◽  
Rice Varieties ◽  
Randomized Design ◽  
Two Factors ◽  
Salinity Levels ◽  
Four Levels

The experiment was conducted at the Agronomy Laboratory of Agrotechnology Discipline, KhulnaUniversity, Khulnato determine the effect of salt stress on germination and seedling growth of indigenous Aman rice varieties during June, 2015 to December, 2015.  The salt tolerant landraces will be used as genetic resource for variety development program in future. The factorial experiment consists of two factors such as ten indigenous Aman rice varieties and four levels of salt solutions viz EC (dS m−1) of 5, 10 and 15 with control (distilled water). The experiment was laid out in Completely Randomized Design (CRD) with three replications. The interaction effects between variety and salinity on germination and seedling growth parameters of indigenous Aman rice varieties were varied significantly. It was found that germination capacity, energy, speed, seedling vigor index, root length and shoot length of rice were decreased gradually with increasing salinity. The germination energy and germination speed of most varieties were drastically reduced at 10 dS m−1 or higher salinity levels. The germination capacity of Hatibazor, Boushohagi, Shadagotal and Moinamoti were recorded 97.66 %, 99.33%, 98.0 % and 97.33%, respectively at 15 dS m−1 water salinity in laboratory condition. The results revealed that the indigenous Aman rice varieties named Boushohagi, Shadagotal, Hatibazor, Moinamoti, Motha were performed better over other varieties considering of germination and seedling growth parameters.J. Bangladesh Agril. Univ. 15(2): 182-187, December 2017

scholarly journals Diversity in growth and expression pattern of PoHKT1 and PoVHA transporter genes under NaCl stress in Portulaca oleracea taxa

Genetika ◽  
2016 ◽  
Vol 48 (1) ◽  
pp. 233-248
Author(s):  
R. El-Bakatoushi ◽  
A. Elframawy
Keyword(s):  
Salt Stress ◽  
Plant Growth ◽  
Root Length ◽  
Growth Parameters ◽  
Dry Weight ◽  
Significant Negative Correlation ◽  
Nacl Stress ◽  
Shoot Length ◽  
Portulaca Oleracea ◽  
Number Of Leaves

Plant growth and the expression of two transporter genes; PoHKT1 and PoVHA transcripts in root and shoot tissues were studied under salt stress of three Portulaca oleracea s.l. taxa. The study showed no significant differences in ratios between root lengths in saline and non-saline treatments of the three taxa, which was correlated with a clear down-regulation of the PoHKT1 transcripts in the root after 150mM NaCl. All measured growth parameters except root length increased in P. oleraceae, decreased in P. granulatostellulata and remain unchanged after 100mM NaCl in P. nitida compared to control under saline conditions. The result was consistent with the type of taxon which had significant effect on the shoot length, number of leaves and dry weight (P< 0.05). All measured growth parameters except root length showed a significant negative correlation with the shoot fold change of PoHKT1 transcripts (r = -0.607, -0.693 and -0.657 respectively). The regulation of PoVHA in root and shoot tissues in the three taxa are significantly different. Under salt stress, both decreased uptake of Na+ into the cytosol by decreasing the expression of PoHKT1 and increased vascular compartmentalization ability of Na+ by inducing the expression of PoVHA seem to work more efficiently in P. oleraceae and P. nitida than in P. granulato-stellulata.

scholarly journals Influence of salinity levels on vegetative development of landrace dwarf common bean (Phaseolus vulgaris L.) Genotypes

2018 ◽  
Vol 7 (9) ◽  
pp. 167-179
Author(s):  
Kamile Ulukapi ◽  
Köksal Aydinsakir
Keyword(s):  
Common Bean ◽  
Growth Parameters ◽  
Dry Weight ◽  
Morphological Characters ◽  
Western Mediterranean ◽  
Vegetative Development ◽  
Low Salinity ◽  
Salt Level ◽  
Salinity Levels ◽  
The Common

In this study, plant growth parameters of 16 landrace dwarf common bean genotypes collected from Western Mediterranean region of Turkey at different salinity levels were investigated. The salt concentrations were applied 0.5 (regular irrigation water), 2, 4 and 6 dSm-1. The study continued until the first flowering was observed in the plants. The results of analysis of the variance revealed significant variations among different salinity levels, genotypes and interaction effects of salinity levels × genotypes for morphological characters. According to statistical analysis results, there was no correlation between stem diameter and other morphological characters. It was determined that there was a statistically significant positive strong correlation between plant height and plant dry weight (r=0.703). There was a moderately statistically significant positive correlation between all other characters. The increased salinity level negatively affected the vegetative growth of the common bean genotypes. However, low doses of salt have promoted development in some genotypes (AGB10, AGUN25, BY4, BY24, IYOZ10). However, a slight increase in salt level caused a sudden drop in development. These genotypes are thought to be suitable for soils with low salinity. The genotypes gave different responses to salt stress and ISGA1 and ISGA10 genotypes gave the best results. Besides them, prominent genotypes were detected as AGUN6, BKARA2, AGB10 and IYOZ10.

scholarly journals ALLEVIATING THE SALT STRESS EFFECTS IN Salvia splendens BY HUMIC ACID APPLICATION

2019 ◽  
Vol 18 (5) ◽  
pp. 73-82 ◽  
Author(s):  
Zahra Karimian ◽  
Leila Samiei ◽  
Jafar Nabati
Keyword(s):  
Salt Stress ◽  
Humic Acid ◽  
Urban Landscape ◽  
Growth Parameters ◽  
Sugar Content ◽  
Total Phenol Content ◽  
Growth Media ◽  
Salvia Splendens ◽  
Biochemical Compounds ◽  
Salinity Levels

Salt stress is a serious problem in urban landscape of arid and semi arid regions. To overcome the adverse impacts of salinity, the application of organic matter and plant nutrients in the growth media for improving of plant growth is essential. An experiment was conducted in order to determine the response of Salvia splendens to salinity levels and also the role of humic acid in the salt stress alleviation. In the current experiment five salinity (0, 20, 40, 60, and 80 mM NaCl) and three humic acid (0, 100, 500 and 1000 mg l−1) treatments were prepared. The effects of these treatments were investigated on some growth parameters, physiological characteristics and also biochemical compounds. The results indicated that the growth parameters decreased in saline-treated plants than control plants. Different salinity levels significantly affected relative water content, evaporation rate and also electrolyte leakage. Salinity caused the increase in proline, malondialdehyde, sugar content, DPPH, total phenol content and decrease in chlorophyll, compare to the control plants. Application of humic acid on Salvia splendens, decrease leaf area and plant height compared to the control plants. Thus, regarding the growth parameters, it is probable that the effect of humic acid on the biochemical compounds is similar to salinity effect. The findings suggest that Sage is a sensitive ornamental plant to salinity and humic acid (in the studied levels) could not alleviate the negative effects of salt stress on this plant.

scholarly journals INFLUENCE OF SALINITY ON GROWTH AND ORGANIC COMPOUNDS CONTENT OF CARROT (Daucus carota L.)

2019 ◽  
Vol 18 (6) ◽  
pp. 85-96
Author(s):  
Safwan Shiyab ◽  
Bassam Al-Qarallah ◽  
Muhanad Akash
Keyword(s):  
Daucus Carota ◽  
Growth Parameters ◽  
Germination Percentage ◽  
Control Treatment ◽  
Salinity Treatment ◽  
Stress Concentrations ◽  
Elevated Salinity ◽  
Significant Difference ◽  
Salinity Levels ◽  
Shoot Weight

Carrot production of valuable carotenes, carbohydrate and protein are hindered by elevated salinity levels in many parts of the world. To assess this problem, germination and growth of two carrot cultivars (Daucus carota cvs Jordan and Napoli) were studied in vivo and in vitro under different salt stress concentrations (0, 75, and 150 mM NaCl). Seeds were directly or gradually exposed to these salt concentrations. With elevated salinity levels, significant reductions in growth parameters (dry shoot weight, fresh shoot weight, shoot length, root length, and root number) were observed. Also, significant difference in germination percentage was observed at 150 mM NaCl in both cultivars when compared with control treatment (90% germination percentage in Napoli and 71% in Jordan cultivar). Growth rate, tolerant index, and relative water content (RWC) declined as salinity increased. The 150 mM NaCl salinity treatment significantly reduced the shoot chlorophyll and protein content, but increased carbohydrate content. Lesser impairment by the gradual exposure of seedling to salinity provides an opportunity to study the acquirement of salt tolerance.

scholarly journals Effect of Salinity on Growth and Some Photosynthetic Pigments of Improved Population in Puccinellia ciliata (Poaceae)

2020 ◽  
pp. 64-70 ◽  
Author(s):  
Ilkay Yavas ◽  
Yelda Emek ◽  
Aydin Unay
Keyword(s):  
Chlorophyll A ◽  
Seedling Growth ◽  
Photosynthetic Pigments ◽  
Recurrent Selection ◽  
Growth Parameters ◽  
Maximum Length ◽  
Low Salinity ◽  
Randomized Design ◽  
Salinity Levels ◽  
Β Carotene

Puccinellia (Puccinellia ciliata Bor.) fairly resistant to salinity and used as forage for livestock in China, Australia, and Turkey. In this study, our objective was to determine the effects of salinity on growth and various photosynthetic pigments of an improved population of Puccinellia via recurrent selection. To accomplish this, effects of salinity on seedlings growth of homogenous Puccinellia was examined, one week after emerging of radicle from seeds. Seeds were germinated on Murashige and Skoog (MS) medium with 6% agar. Seedling growth was studied under different levels of NaCl salinity (0, 10, 20, 30, 40 μS/cm). Salinity applications were carried out for 6 weeks. Cultures were maintained in growth chambers at 24±2ºC and 16/8 light/dark conditions. Germination was scored during 2 weeks after culture initiation. The experiment was performed in a completely randomized design with three replicates. Plant growth parameters such as the number of radicle and tillers, maximum radicle and shoot length, plants fresh and dry weights were investigated. Photosynthetic pigments such as total chlorophyll, chlorophyll a, b, chlorophyll a/b ratio, total carotenoid, β- carotene, lutein and neoxanthin were examined. The maximum values for tiller number per plant, the maximum length of shoot and chlorophyll b were found in the 20 µs/cm, while the maximum length of the radicle was recorded at 10 µs/cm NaCl treatment. It was concluded that low salinity levels (10-20 μS/cm) increased seedling growth, while high salinity levels (30 and 40 μS/cm) inhibited the growth significantly. These results indicate that P. ciliata is a promising salt-tolerant and can be grown productively under low to moderate saline conditions between 10-20 µs/cm.

scholarly journals Mitigation of NaCl Stress in Wheat by Rhizosphere Engineering Using Salt Habitat Adapted PGPR Halotolerant Bacteria

2021 ◽  
Vol 11 (3) ◽  
pp. 1034
Author(s):  
Souhila Kerbab ◽  
Allaoua Silini ◽  
Ali Chenari Bouket ◽  
Hafsa Cherif-Silini ◽  
Manal Eshelli ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Salt Stress ◽  
Plant Growth ◽  
Durum Wheat ◽  
Growth Parameters ◽  
Nacl Stress ◽  
Stress Conditions ◽  
Bacterial Strains ◽  
Plant Growth Promoting ◽  
Growth Promoting

There is a great interest in mitigating soil salinity that limits plant growth and productivity. In this study, eighty-nine strains were isolated from the rhizosphere and endosphere of two halophyte species (Suaeda mollis and Salsola tetrandra) collected from three chotts in Algeria. They were screened for diverse plant growth-promoting traits, antifungal activity and tolerance to different physico-chemical conditions (pH, PEG, and NaCl) to evaluate their efficiency in mitigating salt stress and enhancing the growth of Arabidopsis thaliana and durum wheat under NaCl–stress conditions. Three bacterial strains BR5, OR15, and RB13 were finally selected and identified as Bacillus atropheus. The Bacterial strains (separately and combined) were then used for inoculating Arabidopsis thaliana and durum wheat during the seed germination stage under NaCl stress conditions. Results indicated that inoculation of both plant spp. with the bacterial strains separately or combined considerably improved the growth parameters. Three soils with different salinity levels (S1 = 0.48, S2 = 3.81, and S3 = 2.80 mS/cm) were used to investigate the effects of selected strains (BR5, OR15, and RB13; separately and combined) on several growth parameters of wheat plants. The inoculation (notably the multi-strain consortium) proved a better approach to increase the chlorophyll and carotenoid contents as compared to control plants. However, proline content, lipid peroxidation, and activities of antioxidant enzymes decreased after inoculation with the plant growth-promoting rhizobacteria (PGPR) that can attenuate the adverse effects of salt stress by reducing the reactive oxygen species (ROS) production. These results indicated that under saline soil conditions, halotolerant PGPR strains are promising candidates as biofertilizers under salt stress conditions.

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