Effect of salinity and temperature on seed germination in Limonium cossonianum

Botany ◽  
2013 ◽  
Vol 91 (1) ◽  
pp. 12-16 ◽  
Author(s):  
Esther Giménez Luque ◽  
Isabel C. Delgado Fernández ◽  
Francisco Gómez Mercado
Keyword(s):  
Seed Germination ◽  
Germination Percentage ◽  
Balearic Islands ◽  
Distilled Water ◽  
Endemic Plant ◽  
Temperature Regimes ◽  
Salinity Levels ◽  
Mean Time ◽  
Different Levels ◽  
Ornamental Species

Limonium cossonianum Kuntze is an interesting endemic plant in the southeastern Iberian Peninsula and the Balearic Islands that can be used in wetland restoration and as an ornamental species in saline areas. Experiments were carried out to investigate seed germination responses in L. cossonianum at different levels of salinity (0, 100, 200, and 400 mmol/L NaCl) and under different temperature regimes (20/10, 25/15, 30/20, and 35/25 °C, day/night), both in a 14 h light – 10 h dark photoperiod. Seed germination in L. cossonianum was significantly affected by salinity levels, temperature, and the interaction of both parameters. Maximum germination was recorded in the lowest saline media (100 mmol/L NaCl) and distilled water (0 mmol/L NaCl) at 20/10 °C. No seeds germinated in concentrations above 200 mmol/L NaCl at the higher temperatures. The increase in salinity delayed the beginning and end of germination, reduced final germination percentage, and increased mean time to germination. The rate of germination decreased with an increase in salinity and temperature.

scholarly journals Assessing the germinability of coastal Limonium minutum (Plumbaginaceae) under different temperature and salinity conditions: implications for its conservation

2021 ◽  
Vol 154 (3) ◽  
pp. 332-340
Author(s):  
Carles Cardona ◽  
Iván Cortés ◽  
Pere M. Mir ◽  
Lorenzo Gil
Keyword(s):  
Seed Germination ◽  
Germination Percentage ◽  
Balearic Islands ◽  
Effect Of Temperature ◽  
Distilled Water ◽  
Endemic Plant ◽  
Effects Of Temperature ◽  
Rocky Habitats ◽  
Almost All ◽  
Saline Solutions

Background and aims – Limonium minutum is an endemic plant of the eastern Balearic Islands (Majorca and Minorca), where it grows in coastal rocky habitats. The effects of temperature and salinity on seed germination of Limonium minutum were evaluated in order to set a protocol for recovery of this species in this habitat.Material and methods – Experiments to determine the effect of temperature have been carried out at temperature conditions between 10 and 23°C. Tests to determine the effect of salinity have been evaluated at 18°C with concentrations of 0, 100, 200, 300, and 400 mM of MgCl2, MgSO4, NaCl, and Na2SO4.Key results – Maximum germination took place between 16 and 20°C. Based on the salinity tests, the highest germination values were obtained with distilled water. The use of saline solutions resulted in significant decreases in the germination percentage. However, in almost all treatments, seed germination was observed. The T50 increased at low temperatures and with increasing salt concentration.Conclusion – Limonium minutum has a wide germination temperature range and a high resistance to salinity. After being exposed to different saline solutions, once washed with distilled water, the seeds recover their full germination capacity; therefore, the effect of salts is an osmotic and non-toxic effect for this species. Sowing seeds in late August ensures that the species has an optimal chance to survive in coastal habitats.

scholarly journals Effects of different levels of NaCl on the seed germination of Cyamopsis tetragonoloba L.

2020 ◽  
Vol 49 (3) ◽  
pp. 625-632
Author(s):  
Muhammad Akram ◽  
Mehwish Zahid ◽  
Abu Bakr Umer Farooq ◽  
Muhammad Nafees ◽  
Atta Rasool
Keyword(s):  
Seed Germination ◽  
Germination Percentage ◽  
Seed Vigor ◽  
Stress Index ◽  
Cyamopsis Tetragonoloba ◽  
Vigor Index ◽  
Seedling Length ◽  
Salinity Levels ◽  
Mean Germination Time ◽  
Different Levels

Effects of four different levels of NaCl (05, 10, 15, 20 dS/m) on the seed germination of cluster bean (Cyamopsis tetragonoloba L.) cultivars were investigated. Only distilled water was used in the control. The experiment was conducted in the Petri dishes under laboratory condition and laid out in CRD comprising five replicates. The results indicated that the germination index (GI), seed vigor index (SVI), germination stress index and seedling length (radicle and plumule) decreased with increase of salinity levels and germination percentage (GP) was reduced significantly at the highest level of salinity (200 mM). However, mean germination time (MGT) and time taken for 50% germination (T50) increased by increasing salinity levels. Correlation coefficient between all possible combinations was estimated and the results indicated that GP, GI, MGT, T50, and SVI had significant positive or negative correlation with each other.

scholarly journals Effects of drought and temperature on the germination of seeds of Seriphidium transiliense, a desert xerophytic subshrub of Xinjiang, China

2020 ◽  
Vol 48 (3) ◽  
pp. 355-365
Author(s):  
Aiping Chen ◽  
Yuxiang Wang ◽  
Xiaoqing Sui ◽  
Guili Jin ◽  
Kun Wang ◽  
...  
Keyword(s):  
Seed Germination ◽  
Arid Regions ◽  
Germination Percentage ◽  
Temperature Regimes ◽  
Germination Ability ◽  
Germination Characteristics ◽  
Vigour Index ◽  
Effects Of Drought ◽  
Plant Life Cycle ◽  
Mean Time

Global warming has led to changes in rainfall patterns in many regions and it has an increasing impact on the availability of water for plants, especially in the arid and semi-arid regions. Seed germination is the most critical stage in the plant life cycle, it determines whether or not the population can successfully establish. Here, we assessed the seed germination characteristics of Seriphidium transiliense under six water potentials and four temperature regimes. S. transiliense seeds could germinate from 5/15°C to 20/30°C, while the optimum temperature regime was 10/20°C. As water potential decreased, the germination percentage, germination index, germination energy, vigour index, plumule length and radicle length increased and then decreased, while mean time to germinate decreased and then increased. The optimum condition for S. transiliense seed germination was -0.2 MPa at 10/20°C. Some seeds that failed to germinate under drought conditions were transferred to distilled water and recovered germination ability.

Morphological performances of BINA soybean 6 (Glycine max) at several salinity stress concentrations in coastal region of Bangladesh

2021 ◽  
Vol 27 (02) ◽  
pp. 2287-2295
Author(s):  
F. A. Trina ◽  
R. Ahmed ◽  
R. A. Ruhi ◽  
M. I. H. Joy ◽  
M. B. J. Maliha
Keyword(s):  
Latin Square ◽  
Coastal Region ◽  
Germination Percentage ◽  
Distilled Water ◽  
Stress Concentrations ◽  
Flower Plant ◽  
Experimental Parameters ◽  
Salinity Levels ◽  
Branch Plant ◽  
Number Of Leaves

A pot experiment was conducted from 2019 to 2020 at Noakhali Science and Technology University (NSTU), Noakhali, Bangladesh, to investigate the morphological performances of BINA Soybean-6 under various saline conditions. Salinity is a widespread problem responsible for limiting the productivity of oilseed crops and soybean cultivars differ in their sensitivity to soil salinity. The research material was BINA Soybean-6 collected from the Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh. There were five treatments of salinity viz., T0 (distilled water), T1 (50mMNaCl), T2 (100mMNaCl), T3 (150mMNaCl) and T4 (200mMNaCl) were used in the experiment in which distilled water was used as control. Latin Square Design (LSD) with three replications was used in this experiment. In the present study, BINA Soybean 6 showed a significant variation in the contributing parameters. The experimental parameters used during the experiment were germination percentage and duration, height of plants (cm), number of branches/plant, number of leaves/plant, number of flowers/plant, number of pods/plant, length of pods (cm), seeds/pod, and length of root (cm). The highest germination percentage (83.33%) was observed in control (T0) condition while germination percentage was suppressed under T4 treatment i.e. 200mMNaCl concentration. Germination percentages were gradually decreased with the increase of salinity level. The highest plant height (34.22 cm), number of branch plant-1 (3.44), leaf number plant-1 (13.56), number of flower plant-1 (24.33), pod number plant-1 (21.22), seeds pod-1 (3.33), length of pod (5.44 cm) and root length (15.89 cm) were obtained at control (T0) condition. It was observed that the parameters were diminished gradually with the rising of salinity levels compared to the treatment T0 (Control).

scholarly journals The Effect of Priming Treatments on Germination and Seedling Performance of Purslane (Portulaca oleracea) Seed Lots

2017 ◽  
Vol 74 (2) ◽  
pp. 164
Author(s):  
Eren OZDEN ◽  
Ibrahim DEMIR
Keyword(s):  
Seed Germination ◽  
Relative Humidity ◽  
Seedling Emergence ◽  
Germination Percentage ◽  
Portulaca Oleracea ◽  
Distilled Water ◽  
Climate Chamber ◽  
Untreated Seed ◽  
Percent Relative Humidity ◽  
Purslane Seed

This study was conducted to test the effect of a priming combination on the seed germination percentage and seedling emergence performance of purslane under climate chamber and field conditions. Four purslane seed lots were treated according five different methods, which were T1: Seeds kept at a hundred percent relative humidity for four hours at 20 °C; T2: Seeds kept at a hundred percent relative humidity for four hours at 20 °C, and then soaked in distilled water for 8 hours at 5 °C; T3: Seeds kept at a hundred percent relative humidity for four hours at 20 °C, and then soaked in distilled water for 8 hours at 20 °C; T4: Seeds soaked in distilled water for 8 hours at 5 °C; T5: Seeds soaked in distilled water for 8 hours at 20 °C; and C: Control (untreated). Seed germination was calculated for 14 days at 20 °C, seedling emergence percentages were calculated in the climatically-controlled chamber for 21 days at 22 °C, and in the field for 35 days at 15-25 °C. The highest seed germination (94%) and seedling emergence in the climatically-controlled chamber (87%) and field (82%) were obtained from seeds that had been kept at a hundred percent relative humidity for four hours at 20 °C, then soaked in distilled water for eight hours at 5 °C. Results indicated that farm-priming, can be an efficient priming method in purslane seeds.

scholarly journals Environmental and Genotypic Regulation of Alstroemeria Seed Germination

HortScience ◽  
1990 ◽  
Vol 25 (12) ◽  
pp. 1607-1609 ◽  
Author(s):  
Joseph J. King ◽  
Mark P. Bridgen
Keyword(s):  
Seed Germination ◽  
Gibberellic Acid ◽  
The Other ◽  
Distilled Water ◽  
Cold Environment ◽  
Environmental Regime ◽  
Environmental Regimes ◽  
Temperature Regimes ◽  
Percent Germination

Presowing treatments and temperature regimes were tested to improve germination of Alstroemeria hybrids 3 to 12 months following harvest. In addition, seeds from 20 intraspecific F1 hybrids of five selections were also tested 3 to 7 or 8 to 12 weeks following harvest. Seeds were pretreated by chipping the seedcoat above the embryo, general abrasion of the entire seedcoat, or soaking 12 hours in distilled water, GA, (0.029, 0.29, 2.9 mm), or KNO3 (0.5 and 1.0 m). Pretreatments were evaluated under three environmental regimes: 8 weeks at a constant 18-25C (warm), 4 weeks at 18-25C followed by 4 weeks at 7C (warm-cold), or 4 weeks at 7C followed by 4 weeks at 18-25C (cold-warm). There was an interaction between pretreatment and environmental regime for percent germination. Germination percentages for the water soak and GA, at 0.29 or 2.9 mm were significantly higher than for the other pretreatments, but were not significantly different from one another. The warm-cold environment yielded higher germination percentages than the other environments. The time to germination was longest for the cold-warm regime. This response depended on the genotype and the age of the seed. Chemical name used: gibberellic acid (GA3).

scholarly journals The Alleviation Effect of Silicon on Seed Germination and Seedling Growth of Tomato Under Salinity Stress

2012 ◽  
Vol 76 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Maryam Haghighi ◽  
Zahra Afifipour ◽  
Maryam Mozafarian
Keyword(s):  
Seed Germination ◽  
Salinity Stress ◽  
Seedling Growth ◽  
Germination Rate ◽  
Germination Percentage ◽  
Percentage Germination ◽  
Tomato Seeds ◽  
Germination Characteristics ◽  
Salinity Levels ◽  
Mean Germination Time

The Alleviation Effect of Silicon on Seed Germination and Seedling Growth of Tomato Under Salinity StressThis study was conducted to evaluate the effectiveness of silicon (Si) application under salinity levels on seed germination and growth characteristics of tomato seeds. A laboratory experiment was performed on completely randomized design with two levels of salinity (25 and 50 mM NaCl) and 2 concentration of Si (1 and 2 mM) with 4 replications. Germination percentage, germination rate, seedling shoot and root length, fresh and dry weight of seedling and mean germination time was measured. Seed germination ofLycopersicon esculentumL. was significantly affected by salinity levels, Si and their interaction. Germination characteristics of tomato seeds decreased drastically by increasing NaCl concentrations. However, 1 mM Si had positive effects on seed germination characteristics and improved germination percentage, germination rate and mean germination time. Si alleviated the harmful effect of salinity stress on tomato seed germination at almost all germination characteristics.

Comparison of germination responses of cultivated wheat ( Triticum ) and its wild relative ( Aegilops ) species under salinity, temperature and light

2007 ◽  
Vol 55 (4) ◽  
pp. 407-415 ◽  
Author(s):  
M. Yildiz ◽  
E. Kasap
Keyword(s):  
Seed Germination ◽  
Inhibitory Effect ◽  
Wild Relative ◽  
Wheat Cultivars ◽  
Wheat Species ◽  
Wild Wheat ◽  
Light Levels ◽  
Temperature Regimes ◽  
Salinity Levels ◽  
Alternating Temperature

The seed germination of bread ( Triticum aestivum cv. Bezostaya 1 and Ceyhan 99) and durum ( Triticum durum cv. Diyarbakır 81 and Fırat 93) wheat species and their wild relative species ( Aegilops biuncialis and Ae. triuncialis ) was compared at two light levels, nine NaCl concentrations and three alternating temperature regimes. No seeds germinated at 675 mmol/L NaCl. The highest seed germination (100%) of cultivated wheat cultivars was noted in the control at 15/25°C and 20/30°C, and that of wild wheat species in both the control and the 150 mmol/L NaCl treatment under all temperature regimes. The seed germination of bread and durum wheat cultivars was completely inhibited at or above 450 and 375 mmol/L NaCl, respectively. No Ae. biuncialis seeds germinated at 600 mmol/L NaCl, while seeds of Ae. triuncialis germinated at this concentration (38.9%) only at 20/30°C in darkness. The inhibitory effect of light on germination in all genotypes was determined in some salinity levels at 15/25°C. The optimal germination treatment for all genotypes was 15/25°C temperature regime and darkness. The inhibitory effect of high salinity on germination was greater at 25/35°C than at 15/25°C or 20/30°C. In salinity and temperature interactions, the seeds of wild wheat species were found to be more tolerant than those of wheat cultivars.

scholarly journals Effect of gibberellic acid, stratification and salinity on seed germination of Echinacea purpurea cv. Magnus

2015 ◽  
Vol 61 (3) ◽  
pp. 13-22 ◽  
Author(s):  
Shamila Yadolahi Zadeh ◽  
Ali Akbar Ramin ◽  
Bahram Baninasab
Keyword(s):  
Seed Germination ◽  
Gibberellic Acid ◽  
Salinity Stress ◽  
Echinacea Purpurea ◽  
Purple Coneflower ◽  
Randomized Design ◽  
Salinity Levels ◽  
The Mean ◽  
Completely Randomized Design ◽  
Mean Time

SummaryThis study was conducted in order to determine the appropriate treatment for breaking dormancy and the effect of salinity on seed germination of purple coneflower (Echinacea purpureacv. Magnus), in two separate experiments. In the first experiment, five levels of gibberellic acid (GA3) (0, 250, 500, 1000, and 1500 mg×L−1) with four levels of cold moist stratification period of seeds at 5°C (0, 5, 10 and 15 days) were launched. A factorial experiment was conducted in a completely randomized design with four replications. The statistical analysis showed that concentration of 250 mg×L−1GA3with 10 days of cold moist chilling significantly increased the percentage of germination of normal seedlings and reduced the mean time of germination. In the second experiment, the seeds were chilled for 10 days at 5°C and half of them treated with 250 mg×L−1GA3for 24 hours. The seeds treated with GA3, and those non-treated were subjected to NaCl for salinity stress. The experiment was conducted using five salinity levels (0, 20, 40, 60 and 80 mM NaCl) in four replications in a completely randomized design. The results showed that purple coneflower is highly sensitive to salinity in the germination stage. The results also showed that by increasing salinity levels, the percentage of germination and normal seedlings significantly decreased and the mean time to germination increased, compared to the control treatment. But the seeds treated with GA3showed higher viability and better performance under salinity stress condition.

Relating germination requirements of timber milkvetch to seral stage in the Interior Douglas-fir zone

2014 ◽  
Vol 94 (4) ◽  
pp. 723-726
Author(s):  
D. J. Thompson
Keyword(s):  
Seed Germination ◽  
Germination Rate ◽  
Germination Percentage ◽  
Douglas Fir ◽  
Native Plant ◽  
Temperature Regimes ◽  
The Mean ◽  
Lower Temperature ◽  
Fluctuating Temperatures ◽  
Germination Requirements

Thompson, D. J. 2014. Relating germination requirements of timber milkvetch to seral stage in the Interior Douglas-fir zone. Can. J. Plant Sci. 94: 723–726. Germination of timber milkvetch (Astragalus miser var. serotinus) seeds was studied to determine if it is an early or late seral species. Seeds were collected from a native plant population and those having a dark seed coat were selected. Germination tests were run in the light or dark and under three temperature regimes: low (constant 10°C), high (constant 25°C), and alternating (25°C day and 10°C night). Germination occurred over a protracted period with new germinants up to 90 d at the lowest temperature. Germination was not affected by light. Germination rate was greater at 25°C than 10°C, while fluctuating temperatures (25 and 10°C alternating every 12 h) reduced germination rate to that at the lower temperature. Days to 50% germination was a more sensitive indicator, with the mean for the fluctuating temperatures falling between those continuous to the high and low temperature. Final germination percentage was reduced at 10°C compared with 25°C, but not with fluctuating temperatures. Timber milkvetch seed germination did not respond to light or fluctuating temperatures, adding to a body of evidence that it is a late seral species.

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