scholarly journals Flowering phenology of apricot cultivars in the Belgrade region

2020 ◽  
Vol 65 (3) ◽  
pp. 239-249
Author(s):  
Dragan Milatovic ◽  
Gordan Zec ◽  
Dejan Djurovic ◽  
Mirjana Ruml
Keyword(s):  
Flowering Time ◽  
Air Temperature ◽  
Meteorological Factors ◽  
Average Duration ◽  
Flowering Phenology ◽  
Average Score ◽  
Genetic Traits ◽  
Full Flowering ◽  
Beginning Of Flowering ◽  
Flowering Intensity

The phenology of flowering was studied in 50 apricot cultivars in the Belgrade region over a period of eight years (2009-2016). Within the flowering phenophase, three sub-phases were registered: the beginning of flowering, full flowering and the end of flowering. In addition, the duration and abundance of flowering were examined. The average date of the beginning of flowering for all cultivars was March 22, of full flowering - March 25, and of the end of flowering - April 1. The average duration of flowering was 9.7 days, with a range among cultivars between 7.5 days ('Gergana') and 12 days ('Ninfa ' and 'Radka'). The lowest average score (3.0) for flowering intensity was obtained in 'Hungarian Best' cultivar, and the highest score (4.6) in 'Harcot' and 'Leskora' cultivars. In years with higher temperatures during the flowering, a smaller range in flowering time among cultivars was recorded, as well as shorter duration of flowering. Based on the beginning of flowering, the tested cultivars were classified into three groups: early-flowering (14 cultivars), medium-flowering (21 cultivars) and late-flowering (15 cultivars). Meteorological factors (air temperature) had a greater influence on the course and duration of the flowering phenophase than the genetic traits of the cultivars.

scholarly journals BIOMORPHOBIOLOGICAL CHARACTERISTICS OF THE AROMATIC ROSE CULTIVAR ‘FESTIVALNAYA’ WHEN GROWING IN THE SOUTHERN COAST AND IN THE STEPPE CRIMEA

2020 ◽  
Vol 4 (24) ◽  
pp. 98-113
Author(s):  
N.V. Marko ◽  
Keyword(s):  
Essential Oil ◽  
Flowering Time ◽  
Air Temperature ◽  
Maximum Yield ◽  
High Mass ◽  
Steady Increase ◽  
Material Base ◽  
Southern Coast ◽  
The Crimea ◽  
Beginning Of Flowering

Today, the high demand for rose processing products in the world market determines the need to restore the raw material base of aromatic roses and the development of essential oil manufacture. In the era of the USSR, rose cultivar ‘Festivalnaya’, which was created in the Nikitsky Botanical Garden (NBG-NSC), was one of the most promising for industrial cultivation. Plants of this cultivar are undemanding to environmental conditions and agricultural technologies, grow well on the carbonate soils, resistant to chlorosis, rust, powdery mildew. High mass fraction of essential oil (0.12– 0.14 % of the weight in raw form) and yield (15.8–39.0 centners/ha), as well as high content of phenylethyl alcohol in the essential oil, which was close to the standard - Bulgarian rose from the Kazanlak valley, are distinctive characteristics of this cultivar. For the last 25-30 years, biomorphological studies of plants of this cultivar in the conditions of the Crimea and Russia have not been conducted. The purpose of the research was to study the degree of manifestation of varietal traits of plants of the aromatic rose cv. ‘Festivalnaya’ in different ecological and geographical conditions of the Crimea to determine its genetic stability at conditions of weather and climatic changes in the region. Studies were carried out in 2015–2019 in the collection plantations on grafted plants under conditions of the Southern Coast of the Crimea (SCC) and the Crimean steppe zone according to generally accepted methods. Comparing the obtained data with the literature sources, we concluded that under modern growing conditions, morphological changes affected an increase in the number of thorns per unit of measure (7.18 ± 2.34 pcs., which on average surpasses the literature data by 2.0 pcs.), an increase in the double-flowered trait (on average, there are 95.2 ± 9.0 petals, which is 20 petals more than according to the data mentioned in 1975–1976). The results of phenological observations showed that rose bud swelling in the SCC and steppe Crimea begins in the second half of February when the sum of positive temperatures is above 231 °С and a steady increase in air temperature is above 5.4 °С. Over the past 40 years, the beginning of flowering of the aromatic rose cultivar ‘Festivalnaya’ in the Southern Coast has shifted to an earlier date. The beginning of flowering occurs in the middle/end of May when a certain accumulated temperature is reached (above 1125 °C) and the average monthly air temperature is above +17.5 °C. The period of mass flowering, during which it is possible to collect up to 80 % of the flowers from the total crop, in the Southern Coast lasts 14.4 ± 2.9 days, namely from the end of May to mid-June. In recent years, a tendency to a decrease in the duration of the flowering period of the aromatic rose cv. ‘Festivalnaya’ is observed: the maximum flowering time has decreased and became seven days shorter; the average flowering time – three days shorter. The yield of flowers of grafted bushes of ‘Festivalnaya’ at the age of four to eight years averaged 17.0 centners/ha; the maximum yield reached 24.6 centners/ha.

ADVERSE METEOROLOGICAL SITUATION AS A RISK FACTOR FOR CARDIOVASCULAR DISEASES

2021 ◽  
pp. 28-33
Author(s):  
Kolyagina N.M. ◽  
Berezhnova T.A. ◽  
Kulintsova Ya.V. ◽  
Elistratova O.S. ◽  
Drapalyuk M.A.
Keyword(s):  
Risk Factors ◽  
Heart Failure ◽  
Cardiovascular Diseases ◽  
Medical Care ◽  
Air Temperature ◽  
Meteorological Factors ◽  
Vascular Lesions ◽  
Weather Sensitivity ◽  
Access To Medical Care ◽  
The City

Relevance. Exacerbation of the disease, as a rule, leads to the patient seeking medical help. In this regard, data on the population's access to medical care can serve as an indicator of the exacerbation of the disease. Aim: to analyze meteorological risk factors that contribute to the development of cardiovascular diseases. Material and methods. The ratio of the average number of cases of requests for medical care on unfavorable days for meteorological factors to the average number of cases of requests per day for medical care during the year was calculated. Using software tools (STATISTICA Base V6. 1), the type of data distribution was estimated, and a correlation analysis of the likely relationship between the number of medical care requests and the indicators of meteorological factors was carried out. Results. As a result of the study, it was found that the average number of cases of medical care requests on hot days (air temperature over + 300C) is 1.1-1.4 times higher than the average number of cases of requests per day for the same reasons (diagnoses) during the year and is abnormal for the territory of the city of Voronezh, due to such diagnoses as hypertension without heart failure, brain vascular lesions (specified), cerebrovascular disease, hypertension with heart failure. Conclusions. Thus, it was found that one of the meteorological risk factors for the formation of cardiovascular pathology is high air temperature (above + 300C), which is the goal for the implementation of the main directions of prevention of increased weather sensitivity and treatment of weather-dependent patients.

scholarly journals A Note on the Flowering of Ajuga orientalis L. in Relation to Air Temperature in Mount Aenos (Cephalonia, Greece)

2018 ◽  
Vol 6 (3) ◽  
pp. 261-267 ◽  
Author(s):  
Aristidis Matsoukis ◽  
Athanasios Kamoutsis ◽  
Aikaterini Chronopoulou-Sereli
Keyword(s):  
Plant Species ◽  
Air Temperature ◽  
Landscape Design ◽  
Point Of View ◽  
Meteorological Variables ◽  
Phenological Stage ◽  
Aesthetic Value ◽  
Beginning Of Flowering ◽  
Start Dates

Ajuga orientalis L. is a widespread plant species in many countries, such as Greece, Italy and Turkey, with promising aesthetic value in the field and in landscape design, but nothing is known about its phenology, from a detailed, quantitatively, point of view, in relation to meteorological variables. Thus, under the aforementioned context, the purpose of our work is the elucidation of part of the phenology of this plant, especially concerning its flowering. To achieve this, the phenological stage ‘Beginning of flowering’, in terms of its start dates (julian days), was investigated in relation to average air temperature (T) of March in two areas, Roudi and Kaboulieri at north-northwest and south-southeast slopes, respectively, of Mount Aenos, Cephalonia, Greece, for three successive years (2014-2016). From the analysis of the T of March, it was confirmed that Kaboulieri area was significantly warmer (P<0.05) than Roudi area by 0.8 oC both in 2014 and 2015, with a significantly earlier appearance (P<0.05) of ‘Beginning of flowering’ of A. orientalis in Kaboulieri, ranging from 9.1 (2015) to 10.9 (2014) julian days. The findings of our study could be used for the planning of an efficient preservation program process of the aforementioned plant species in a vulnerable mountainous environment, such as the Mount Aenos environment, as well as for its further exploitation as a decorative plant.

scholarly journals Monitoring the phenology of Forsythia velutina, an endemic plant of Korea

2021 ◽  
Vol 24 (4) ◽  
pp. 355-363
Author(s):  
Jung-Won Sung ◽  
Geun-Ho Kim ◽  
Kyeong-Cheol Lee ◽  
Yun-Jin Shim ◽  
Shin-Gu Kang
Keyword(s):  
Life Cycle ◽  
Flowering Time ◽  
Plant Species ◽  
Meteorological Factors ◽  
Daily Temperature ◽  
Basic Data ◽  
Conservation Strategy ◽  
Endemic Plants ◽  
Flowering Period ◽  
Temperature And Humidity

Background and objective: This study was conducted on Forsythia velutina, a special plant, in Gyeongsangnam-do Arboretum under the Gyeongsangnam-do Forest Environment Research Institute, which is located in the southern part of Korea. Methods: The research aimed to analyze the flowering characteristics of the plant by calculating the optimal temperature and humidity according to the flowering time and flowering period for 8 years from 2010 to 2017 in order to provide basic data for bioclimate studies of endemic plants. Results: It was observed that the Forsythia velutina showed a life cycle from mid-March and to mid-November. Average growth period was 243 (± 6.5) days. In testing the reliability of a single variable according to the meteorological factors, the Cronbach’s Alpha was 0.701, which indicates that the findings were relatively reliable. The average date of flowering was March 16 (SD = 5.8) and the average date on which blossoms fall was March 29 (SD = 5.2). A substantial difference in flowering period was observed from year to year 11 to 23 days, with an average of 16 days (± 4.7). The temperature and humidity in February to March, which affect the flowering, were 2.9-5.5℃, and 66.5-73.0%, respectively, and showed differences every year. Conclusion: The correlation between flowering time and meteorological factors was positive, and the highest daily temperature and average daily temperature had the highest significance. When establishing basic data on plant species for the conservation of endemic plants, the changes in life cycle events and weather conditions are identified. It is believed that it will be helpful in establishing a conservation strategy for the plant species in the future.

scholarly journals Characteristics of Heavy Storms and the Scaling Relation with Air Temperature by Event Process-Based Analysis in South China

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 185 ◽  
Author(s):  
Cuilin Pan ◽  
Xianwei Wang ◽  
Lin Liu ◽  
Dashan Wang ◽  
Huabing Huang
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
South China ◽  
Meteorological Factors ◽  
Rainfall Data ◽  
Precipitation Extremes ◽  
Scaling Relation ◽  
Convective Storms ◽  
Warm Front ◽  
Storm Characteristics

The negative scaling rate between precipitation extremes and the air temperature in tropic and subtropic regions is still a puzzling issue. This study investigates the scaling rate from two aspects, storm characteristics (types) and event process-based temperature variations. Heavy storms in South China are developed by different weather systems with unique meteorological characteristics each season, such as the warm-front storms (January), cold-front storms (April to mid-May), monsoon storms (late May to June), convective storms, and typhoon storms (July to September). This study analyzes the storm characteristics using the hourly rainfall data from 1990 to 2017; compares the storm hyetographs derived from the one-minute rainfall data during 2008–2017; and investigates the interactions between heavy storms and meteorological factors including air temperature, relative humidity, surface pressure, and wind speed at 42 weather stations in Guangzhou during 2015–2017. Most storms, except for typhoon and warm-front storms, had a short duration (3 h) and intense rates (~13 mm/h) in Guangzhou, South China. Convective storms were dominant (50%) in occurrence and had the strongest intensity (15.8 mm/h). Storms in urban areas had stronger interactions with meteorological factors and showed different hyetographs from suburban areas. Meteorological factors had larger variations with the storms that occurred in the day time than at night. The air temperature could rise 6 °C and drop 4 °C prior to and post-summer storms against the diurnal mean state. The 24-hour mean air temperature prior to the storms produced more reliable scaling rates than the naturally daily mean air temperature. The precipitation extremes showed a peak-like scaling relation with the 24-hour mean air temperature and had a break temperature of 28 °C. Below 28 °C, the relative humidity was 80%–100%, and it showed a positive scaling rate. Above 28 °C, the negative scaling relation was likely caused by a lack of moisture in the atmosphere, where the relative humidity decreased with the air temperature increase.

Effect of air temperature on the flowering date of dogwood (Cornus florida)

1975 ◽  
Vol 53 (15) ◽  
pp. 1523-1534 ◽  
Author(s):  
R. J. Reader
Keyword(s):  
Spatial Variation ◽  
Flowering Time ◽  
Air Temperature ◽  
Geographical Variation ◽  
Annual Variation ◽  
Cornus Florida ◽  
Native Range ◽  
Accurate Predictor ◽  
Flowering Date ◽  
Air Temperatures

The summation of air temperatures above 2.2 °C for a 6-week period before flowering explained most of the annual variation in the flowering date of dogwood (Cornus florida L.) at Wauseon, Ohio. The same total was a fairly accurate predictor of flowering date throughout dogwood's native range, which suggests that geographical variation in flowering time is environmentally rather than genetically controlled. Results of the current study are inconclusive concerning spatial variation in the probability of frost on the date of flowering.

scholarly journals Pollinator experience, neophobia and the evolution of flowering time

2008 ◽  
Vol 276 (1658) ◽  
pp. 935-943 ◽  
Author(s):  
Jessica Forrest ◽  
James D Thomson
Keyword(s):  
Frequency Dependence ◽  
Flowering Time ◽  
Environmental Changes ◽  
Flowering Phenology ◽  
Plant Population ◽  
Early Flowering ◽  
Reproductive Phenology ◽  
Pollinator Visitation ◽  
Pollinator Behaviour ◽  
Bee Foraging

Environmental changes, such as current climate warming, can exert directional selection on reproductive phenology. In plants, evolution of earlier flowering requires that the individuals bearing genes for early flowering successfully reproduce; for non-selfing, zoophilous species, this means that early flowering individuals must be visited by pollinators. In a laboratory experiment with artificial flowers, we presented captive bumble-bees ( Bombus impatiens ) with flower arrays representing stages in the phenological progression of a two-species plant community: Bees that had been foraging on flowers of one colour were confronted with increasing numbers of flowers of a second colour. Early flowering individuals of the second ‘species’ were significantly under-visited, because bees avoided unfamiliar flowers, particularly when these were rare. We incorporated these aspects of bee foraging behaviour (neophobia and positive frequency dependence) in a simulation model of flowering-time evolution for a plant population experiencing selection against late flowering. Unlike simple frequency dependence, a lag in pollinator visitation prevented the plant population from responding to selection and led to declines in population size. Pollinator behaviour thus has the potential to constrain evolutionary adjustments of flowering phenology.

scholarly journals Analysis of the Variability of Floral and Pollen Traits in Apple Cultivars—Selecting Suitable Pollen Donors for Cider Apple Orchards

Agronomy ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1717
Author(s):  
Alvaro Delgado ◽  
Muriel Quinet ◽  
Enrique Dapena
Keyword(s):  
Phenotypic Diversity ◽  
Phenotypic Variability ◽  
Germplasm Collection ◽  
Flowering Phenology ◽  
Floral Biology ◽  
Biennial Bearing ◽  
Oceanic Climate ◽  
Apple Cultivars ◽  
Local Germplasm ◽  
Flowering Intensity

Most apple trees (Malus domestica Borkh.) are self-incompatible and fruit yield depends on cross-pollination between genetically compatible cultivars with synchronous flowering. Flowering intensity can vary strongly among years due to the biennial bearing habit of the cultivars. The knowledge of the phenological stages and floral and pollen characteristics is essential to select suitable pollen donors. We evaluated the phenotypic variability of flowering-related traits (i.e., flowering phenology, flowering intensity, pollen production and pollen quality) in 45 apple cultivars over two successive flowering seasons. Large phenotypic variability was found among the studied cultivars indicating that the local germplasm collection provides a good source of genetic and phenotypic diversity. However, low correlations were observed between floral biology traits and, consequently, the improvement in one trait seems not to affect other traits. Some of the cultivars such as ‘Perurico’ and ‘Raxila Dulce’ regularly produced copious amounts of high-quality pollen which can improve the pollen load dispersion leading to a most effective pollination process. We did not identify statistically significant correlations between pollen attributes and the biennial bearing phenomenon. The large variation in bloom dates from year-to-year observed under a typical Oceanic climate makes it advisable to combine cultivars in new plantings.

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