Ornamental plants
Davood Vafadari Komarolya; Mohsen Kafi; Mehdi Khansefid
Abstract
Introduction
As urbanization and population density increase, numerous issues arise in society, including a heightened risk of contagious diseases among the population, putting society at risk and in crisis. The purpose of this study was to identify preventive factors for individuals in the community ...
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Introduction
As urbanization and population density increase, numerous issues arise in society, including a heightened risk of contagious diseases among the population, putting society at risk and in crisis. The purpose of this study was to identify preventive factors for individuals in the community to avoid attending urban parks during the COVID-19 pandemic, as well as to evaluate the capacity of these places to promote public health and their functionality during the pandemic.
Materials and Methods
Using library resources and semi-structured in-depth interviews, the research data questionnaire was obtained and for sampling and determination of sample size, simple random sampling method and Cochran formula related to unknown statistical population with error level of 0.05 were used, respectively. Then, in order to analyze the data, the first question which was prioritized was 4-1 points from the first to the fourth priority and the mean score was calculated and the same process was implemented for the second part questions, respectively. After collecting the questionnaires, the data were extracted and the frequency of each of the options in the questions was determined, then to investigate the first part question which was related to the barriers to the presence of people in urban parks during the pandemic period and should be prioritized, i.e. assigning numbers 1 to 4 based on the participants' opinions, the priority was 4 points for priority 1 score 4, priority 2 points. 3, priority 3 points 2 and priority 4 points 1 selected, After averaging the relevant score, comparing them with each other, the most important barriers were mentioned in the results section, respectively. Also, in order to investigate the questions of the second part, the first question was related to the capacity of urban parks to promote public health in pandemic conditions and should have been answered as a single choice for the very significant option of score 4, the significant option of score 3, the average score option 2 and the low-score option 1, and after the average of the relevant points and comparing it with the average capacity of the park was selected. Some of the general health promotion during pandemic were identified and mentioned in the results section.
Results and Discussion
The study revealed that the most significant barrier to people's presence in urban parks was the absence of health warning signs, with an average score of 3.1. Additionally, the capacity of urban parks to enhance public health received a very significant average score of 3.3. However, the performance of these parks during the COVID-19 pandemic was rated as poor, with an average score of 1.4. Other barriers identified to people's presence in parks include:
- Non-conformity of urban parks design with pandemic conditions
- Inappropriate layout of furniture in urban parks
- Inappropriate shape, material and type of furniture in urban parks in terms of public health
Also, the overall results of urban parks capacity in increasing public health and performance of these places during covid-19 pandemic are as follows:
In relation to the capacity of urban parks in order to increase public health in comparison with other urban uses, the results of the survey of the received data are that out of 230 people in the study, 99 people evaluated the capacity of these places as very significant (43%), 103 significant (45%), 21 moderate (9%) and 7 (3%).
In relation to how the current urban parks play a role in covid-19 pandemic compared to other urban uses, the results of the data survey are as such that out of 230 people present in the research, 5 people performed this Places were assessed as excellent (2%), 11 were good (5%), 53 were moderate (23%) and 156 were weak (70%).
Conclusion
Overall, it can be concluded that urban parks have the potential to significantly promote public health, but during the pandemic period, their effectiveness was limited due to various barriers. It is recommended that designers, urban planners, and health professionals work together to create multi-functional designs that address existing barriers as much as possible. This would enable people to attend urban parks during the pandemic with less concern and potentially reduce the negative consequences of pandemic outbreaks and quarantine.
Mohsen Kafi; Nayyer Azam Khoshkholghsima; Abdolmajid Liaghat
Abstract
Decrease in genome content may play a role in environmental adaptation. Many studies were reported significant correlation between genome size, weather condition and germination percentage. Relative genome content and its correlation with seedling establishment of 14 populations of tall fescue collected ...
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Decrease in genome content may play a role in environmental adaptation. Many studies were reported significant correlation between genome size, weather condition and germination percentage. Relative genome content and its correlation with seedling establishment of 14 populations of tall fescue collected from various regions in Iran and two commercial tall fescue cultivars were studied under drought conditions. Results showed that except one entry diploid (Brojen = 2x), all entries were hexaploid (6x). Cluster analysis revealed that the populations fell into four groups. Isfahan (Group II: average DNA content 17.92 pg) and Ghochan (Group VІ: average DNA content 18.56 pg) with 100% and 6.7% final emergence and 8.8, 2.3 cm leaf length respectively in 40% FC soil water content wree the most tolerable and sensitive entries under drought stress. Relative genom content of the wild populations and two commercial cultivar were negatively correlated with emergence (r=-0.56) and leaf length (r=-0.61). The reduction in genome size may be a mechanism of adaptation to arid environments. The drought tolerance was observed among the entries that grouped in cluster I and II represent potentially useful germplasm for a breeding program.
Maryam Haghighi; Mohsen Kafi
Abstract
Information of heavy metal toxicity about physiological aspect of lettuce is limited. Therefore an experiment was conducted in CRD designed with 7 replications on lettuce (Lactuca sativa L.). Treatments were cadmium in 3 concentration (0, 2 and 4 mg/L) added to Hoagland solution. Results were shown that ...
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Information of heavy metal toxicity about physiological aspect of lettuce is limited. Therefore an experiment was conducted in CRD designed with 7 replications on lettuce (Lactuca sativa L.). Treatments were cadmium in 3 concentration (0, 2 and 4 mg/L) added to Hoagland solution. Results were shown that increasing in cadmium of nutrient solution caused increasing in SOD, POD antioxidant and proline contents of leaf tissues, in addition, cadmium decreased the amount of fresh weight and organic acid. Applying 2 and 4 mg/L cadmium in nutrient solution produced POD, SOD and Proline around 8 and 53%, 55 and 106%, 39 and 119% in 2 and 4 mg/L cadmium, respectively. Whereas in the same concentrations of cadmium protein decreased 25 and 5 %, respectively. Under cadmium stress, toxic effects decline photosynthesis more than chlorophyll content.
Iman Roohollahi; Mohsen Kafi
Abstract
Abstract
Little information is available concerning morphological responses of Lolium perenne cultivars (Numan and Speedy green) to salinity and trinexapac-ethyl treatment in initial growth. In order to evaluate the effect of salinity treatment (0, 2000, 4000 and 6000 mg/lit) and trinexapac-ethyl levels ...
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Abstract
Little information is available concerning morphological responses of Lolium perenne cultivars (Numan and Speedy green) to salinity and trinexapac-ethyl treatment in initial growth. In order to evaluate the effect of salinity treatment (0, 2000, 4000 and 6000 mg/lit) and trinexapac-ethyl levels (0, 50, 100 gr/ha) on morphological responses of 'Numan' and 'Speedy green' in initial growth stage, an experiment was conducted in a factorial experiment based on completely randomized design with three replications. Sodium chloride levels significantly affected shoot and root length, but no significant trinexapac-ethyl treatment was found in initial growth of Lolium perenne cultivars. Trinexapac-ethyl and salinity treatment has no intraction effect in initial growth of this two cultivars. Lolium perenne performance was not affected by trinexapac-ethyl in all concentration in initial growth of this experiment when irrigated by salinity water.
Keywords: Lolium perenne, Cultivar, Salinity Stress, Trinexapac-ethyl
Iman Roohollahi; Mohsen Kafi
Abstract
Abstract
Several root measuring methods have been developed until now but there is no single method of root measurement applicable for all situations. This study was conducted to evaluate the effects of a single trinexapac-ethyl (TE) and paclobutrazol application on Kentucky bluegrass root growth under ...
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Abstract
Several root measuring methods have been developed until now but there is no single method of root measurement applicable for all situations. This study was conducted to evaluate the effects of a single trinexapac-ethyl (TE) and paclobutrazol application on Kentucky bluegrass root growth under three irrigation treatments. Evaluating of root length density (RLD), root surface area (RS) and average root diameter were measured using two methods: Newman and Bohm method, and leaf area meter model (Delta-T-Scan Image Analysis System). The experiment was a split-plot factorial based on randomized complete block design (RCBD) with three replications. Irrigation treatment had no effect on root length density. Paclobutrazol reduced root length density in the second method but had no significant effect on the first. The results of two methods are different and both of them are acceptable in certain situation. In order to reliable study on root, we ought to find the acceptable method performance with due attention to the root characteristic and the type of factor that we evaluate. Finally with high density of roots in turf grass the second method is recommended.
Keywords: Root, Plant growth regulators, Irrigation treatment, Poa pratensis
Maryam Haghighi; Mohsen Kafi
Abstract
Abstract
Lettuce is one of the best accumulators of heavy metals and nitrate between leafy vegetables. Through this research, it was tried to decreased cadmium absorption with humic acid (HA) and studies the effect of HA on the accumulation and metabolism of nitrate. Plants were grown in the peat/perlite ...
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Abstract
Lettuce is one of the best accumulators of heavy metals and nitrate between leafy vegetables. Through this research, it was tried to decreased cadmium absorption with humic acid (HA) and studies the effect of HA on the accumulation and metabolism of nitrate. Plants were grown in the peat/perlite and irrigated with Hoagland solution with addition of cadmium (2 and 4 mg L -1) and HA (100 and 1000 mg L-1). Results showed that Cd in media increased Cd of leaves and decreased protein and fresh weight but it has not any effect on the N, P and nitrate concentration and nitrate reductase activity. With increasing concentration of HA, increasing in fresh weight, N, protein concentration and decreasing in Cd concentration in leaves was observed. Using of HA and Cd together in nutrient solution showed that HA decreased absorption of Cd. So toxic effect of Cd decreased on the physiological changes of lettuce and do not accumulate nitrate in leaves, as well. More investigations should be done for using HA on the polluted soil for planting of lettuce.
Keywords: Nitrogen, Phosphorus, Nitrate, Heavy metal, Nitrate reductase
Maryam Haghighi; Mohsen Kafi; Toktam Taghavi; Abdolkarim Kashi; Gholamreza Savaghebi
Abstract
Abstract
study on photosynthetic and enzym Activity changes in lettuce under cadmium stress has been done in greenhouse. Of zhejang university in Chine The experimental design was a CRD factorial design organized in hydroponic system with 7 replications. Cadmium was added to nutrient solution in CdCl2 ...
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Abstract
study on photosynthetic and enzym Activity changes in lettuce under cadmium stress has been done in greenhouse. Of zhejang university in Chine The experimental design was a CRD factorial design organized in hydroponic system with 7 replications. Cadmium was added to nutrient solution in CdCl2 in three concentrations (0, 2, 4 mg/l). Stomatal photosynthetic factors (transpiration, stomatal and mesophyl conductance, internal CO2 concentration), enzyme activity changes (Proxidase and Superoxid Dismutase),chlorophyll, leaf length and number, biomass, transfer coefficient, was measured. Results showed that peroxidase and superoxide dismutase increased but biomass, photosynthesis, transpiration, stomatal conductance, internal CO2 concentration and leaf length was decreased as cadmium increased in nutrient solution, transfer coefficient was increased also.
Key Words: Photosynthesis, Chlorophyll, Stomata, Antioxidant, ,Cadmium, Lettuce
