scholarly journals Biomorphological features of floribunda roses leaves and their importance for ornamental gardening

2021 ◽  
Vol 1 (99) ◽  
pp. 117-124
Author(s):  
A. A. Brovdi ◽  
◽  
V. V. Polishchuk
Keyword(s):  
Practical Importance ◽  
Visual Assessment ◽  
Leaf Length ◽  
Compound Leaf ◽  
Biometric Parameters ◽  
National University ◽  
Dark Green ◽  
Leaf Appearance ◽  
Different Origins ◽  
Landscape Gardening

The results of morphometric analysis of the leaves in floribunda roses varieties, such as Pomponella, Lovely Green, Carmagnola, Arthur Bell, Lilli Marleen, Westpoint, Minerva, Novalis, Goldelse, Rotkappchen, Friesia, Lavaglut, Iceberg, Santa Monika, Mathias, Bella Rosa, Cream Abundance, Hans Gonewein, Let's Celebrate and Gebruder Grimm, which have different origins and differ significantly in morphological and decorative characteristics are presented. The studies were conducted during 2018–2021 on the experimental plots of the Department of Landscape Gardening of Uman National University of Horticulture according to the generally accepted method. The description of the morphological traits of the varieties was carried out by the method of visual assessment using measurements and calculations. As a result of the research, it was found that the studied genotypes significantly differ in the biometric parameters of the compound leaf, features of the surface of leaf blades, their shape and size. The highest leaf blades areas were noted in the varieties Novalis 15.1 сm2, Rotkappchen 12.0 cm2 and Pomponella 11.8 cm2. The lowest biometric traits of the leaf were recorded in the varieties Santa Monika, whose compound leaf length is 9.2 cm, Mathias 9.1 cm, Bella Rosa 10.8 cm and Cream Abundance 9.8 cm. The size of the leaf, its shape, color and gloss, are important for the overall impression of the planting object and determine the decorative value of the respective variety. Of all the varieties, Westpoint, Rotkappchen, Hans Gonewein, and Gebruder Grimm have the glossiest leaves. The bright shine together with dark green color of the leaves of these varieties make their bushes more expressive and bright and, therefore, more attractive for use in ornamental gardening. The results of the study are of practical importance, since they make it possible to select varieties that are valuable for ornamental gardening, not only in decorativeness of the flower, but also in the characteristics of their leaf appearance.

scholarly journals PECULIARITIES OF FORMATION OF CIVIL ENGAGEMENT OF UNIVERSITY STUDENTS IN QUARANTINE CONDITIONS

2021 ◽  
Vol 1 ◽  
pp. 595-610
Author(s):  
Oleksandra Shykyrynska ◽  
Vanda Vyshkivska ◽  
Vera Petliaieva ◽  
Olena Voichun ◽  
Olena Malinka
Keyword(s):  
Civic Engagement ◽  
University Students ◽  
Practical Importance ◽  
Digital Tools ◽  
Civic Responsibility ◽  
Social Motives ◽  
Civic Consciousness ◽  
Professional Activities ◽  
National University ◽  
Self Knowledge

The article defines the essence of the concept of “civic engagement of university students” and the process of formation of civic engagement of university students in quarantine conditions. The structure of civic engagement of university students is characterized. Criteria are substantiated and indicators of the formation of civic engagement of university students are defined: incentive criterion (sustainable social motives for achieving socially significant goals, the student’s achievement motive, value attitude to future professional activities); epistemological criterion (knowledge about public organizations and their activities, awareness of knowledge of civic responsibility, the presence of civic consciousness) behavioral (leadership ability, responsibility for own decisions, actions and team actions) creatively developing criterion (the presence of self-knowledge skills, the ability to introspection , self-esteem, self-criticism of the results of one's own socially useful activity). The substantive characteristic of such levels of formation of civic engagement of university students as: insufficient, initial, sufficient, high is given. The use of such digital tools is shown, which allows to form effectively the civic engagement of university students in quarantine conditions: a) the creation of an author's blog (to display information about: the national identity of the Ukrainian people (history, traditions, language, culture, etc.), planned for the future and already organized events by the student self-government were held, video and photo reports of the events) b) use of Google applications (Google meet - for conferences, meetings, online consultations; Google Drive, Google forms - for online questionnaires with the aim of : predicting the relevance of the event, it is planned, determining the effectiveness of the activities, identifying the psychological atmosphere in the team, identifying the socio-psychological characteristics of students, student awareness; Google photos; Google calendar; Google video). The results of an experimental study on the formation of civic engagement of university students, carried out during 2019 at V.O. Sukhomlynskyi Mykolaiv National University, are presented, which proves the practical importance of using such digital tools in quarantine conditions. 

scholarly journals Effects of postgrazing residue on morphogenetic and structural characteristics of Tifton 85 pastures

2016 ◽  
Vol 37 (4) ◽  
pp. 2043
Author(s):  
Wilton Ladeira Silva ◽  
Ana Cláudia Ruggieri ◽  
Ricardo Andrade Reis ◽  
Américo Garcia Silva Sobrinho ◽  
Euclides Braga Malheiros
Keyword(s):  
Structural Characteristics ◽  
Stem Elongation ◽  
Light Interception ◽  
Climatic Conditions ◽  
Leaf Length ◽  
Elongation Rate ◽  
Area Index ◽  
Structural Variables ◽  
Senescence Rate ◽  
Leaf Appearance

The ideal time to start grazing is when pastures reach 95% light interception. The use of residual leaf area index (rLAI) to time the interruption of grazing under intermittent grazing has recently been studied in forage species in different climatic conditions in Brazil. However, studies evaluating the formation and development of leaves and tillers through morphogenetic and structural variables in functional rLAI are still lacking for Tifton 85 pastures. Therefore, the objective of this study was to evaluate the effects of varying rLAI in successive grazing cycles on morphogenetic and structural characteristics of Tifton 85 pasture grazed intermittently by sheep. Morphogenetic and structural characteristics were evaluated in three grazing cycles under three rLAI conditions (0.8, 1.6, and 2.4). The regrowth interval (time taken to return to 95% light interception) of pastures increased from 21.33 to 29.66 days with decreasing rLAI. The leaf appearance rate increased at a rate of 0.02 leaves tiller-1 day-1 and the number of live leaves per tiller increased by 0.41 with decreasing rLAI. Phyllochron, leaf elongation rate, final leaf length, leaf senescence rate, and stem elongation rate decreased linearly with decreasing rLAI. The number of live leaves per tiller was lower (7.97) in the third grazing cycle, probably owing to the higher senescence rate observed that same cycle, while the other variables had higher values. The 2.4 rLAI condition promotes excessive stem elongation, reduced leaf appearance, lower number of live leaves per tiller, and increased senescence of leaves, while the 0.8 and 1.6 rLAI conditions promote desirable morphogenetic and structural characteristics, which correlate directly with forage quality. In order to avoid excessive forage losses, grazing must occur preferentially by the end of March, when climatic conditions still support the appropriate development of the plants.

Effects of photoperiod on leaf appearance rate and leaf dimensions in winter and spring wheats

1996 ◽  
Vol 76 (1) ◽  
pp. 43-50 ◽  
Author(s):  
S. Pararajasingham ◽  
L. A. Hunt
Keyword(s):  
Leaf Area ◽  
Leaf Length ◽  
Leaf Number ◽  
Dry Matter Accumulation ◽  
Flag Leaves ◽  
Appearance Rate ◽  
Rate Of Increase ◽  
Leaf Appearance Rate ◽  
Leaf Dimensions ◽  
Leaf Appearance

Research on genotypic variation in the response of leaf-area production and expansion to photoperiod in wheat is limited. Growth-cabinet experiments using four spring and four winter wheat (Triticum aestivum L.) cultivars and four photoperiod (8, 12, 16 and 20 h) treatments were thus conducted with the objective of investigating the effect of photoperiod on leaf appearance rate and leaf dimensions. Winter wheats were grown without vernalization. In the spring wheats, flag leaves and spikes were formed under the longer photoperiod (16 and 20 h) treatments, and leaf number increased linearly with time. At the shorter photoperiods, flag leaves and spikes appeared in some cultivars only, and the rate of increase in leaf number decreased in the later stages. Final leaf number was greater at shorter photoperiods. In the winter cultivars, more leaves appeared than in the spring types under the longer photoperiods. For leaves 3–7, leaf number was a linear function of time, with photoperiod and cultivar effects. For one of four spring cultivars, the rate of leaf appearance was greater at 8 h than at 20 h, whereas for three of the winter cultivars the reverse was true. Leaf length increased with leaf number up to at least nodes 5–6 for both spring and winter types but decreased for the later-formed leaves for the spring but not for the winter types. Leaves of plants grown under photoperiods longer than 8 h were longer and broader than those grown under the short photoperiod, and the effect was more pronounced in winter than in spring cultivars. Such genotypic differences in the direct effects of photoperiod on leaf dimensions, which could influence the rates of leaf-area production and dry-matter accumulation under field conditions, emphasize that future studies should incorporate genotypes from different eco-physiological regions and that simulation models of wheat growth and development may need to account for variability in the control of vegetative growth. Key words: Wheat, photoperiod, leaf appearance rate, leaf length, leaf width

scholarly journals ENVIRONMENTAL-GEOGRAPHICAL ANALYSIS OF NATURAL TYPES OF USE IN THE IVANICHEVSK REGION OF THE VOLYN REGION

2020 ◽  
pp. 57-63
Author(s):  
Oleg Melnik
Keyword(s):  
Local Governments ◽  
Practical Importance ◽  
Spatial Differentiation ◽  
Scientific Work ◽  
Machine Building ◽  
Educational Process ◽  
Nature Management ◽  
Geographical Analysis ◽  
National University ◽  
The Impact

Purpose. The purpose of the study is ecological-geographical analysis of nature management in Ivanichi district of Volyn region. Method. During the scientific work the following methods of socio-geographical research were used: cartographic, comparative, observation, generalization, analysis and synthesis. The statistical method calculates the indicators of transformational changes by types of natural resources. The method of geoinformation modeling of the state of the processes of nature management and their development made it possible to reveal the relationship of transformed resources with the factors of influence. Results. An ecological-geographical assessment of nature management in the Ivanichi district of Volyn region has been carried out. The basis of the economic complex of the district is agriculture and processing industry. On the other hand, mining and machine-building industry prevail in the structure of Novovolynsk city economy. The influence of both natural and technogenic processes and factors on the formation of ecological and geographical situation in the territory of the district is substantiated. The specific combination of environmental management has led to the spatial differentiation of environmental stress and the varying degree of its implementation in the form of a spectrum of hazardous processes. The scientific novelty is the ecological and geographical determination of the types of economic nature management in the Ivanichi district of Volyn region. The analysis of the impact on the formation of the ecological situation in the area and the proposed measures for its optimization are carried out. Practical importance. The results of the study can be used in the educational process of the East National University named after Lesya Ukrainka in teaching a number of geographic and tourism disciplines. The results will find their application in the legislative and executive work of local governments in the development of programs for socio-economic development of the territory. The research materials will facilitate the rational use of economically transformed natural and anthropogenic territories and objects of the Ivanichi district of Volyn, which will increase the profitability and competitiveness of the exploitation of the objects of land and industrial fund. A number of provisions can be used in similar studies in other regions of Ukraine.

scholarly journals The role and peculiarity of student organizations in modern Kazakhstan society

2020 ◽  
Vol 133 (4) ◽  
pp. 226-235
Author(s):  
D.K. Burkhanova ◽  
◽  
A.N. Nurkanat ◽  
Keyword(s):  
Practical Importance ◽  
Student Organizations ◽  
Social Institution ◽  
Sociological Research ◽  
Educational Work ◽  
Main Method ◽  
Higher Education System ◽  
The Social ◽  
National University

The article is devoted to the activities of student public organizations, its role and influence on the formation of the social culture of young people. The purpose of this article is to study the role of student organizations in the higher education system of modern Kazakhstan society. The scientific significance of the research is the substantiation of the main activities of student organizations and the motivation of young participants. There has been used a questionnaire as the main method of studying the role of student organizations among students of the Al-Farabi Kazakh National University. And its results have been analyzed by statistical analysis and data analysis. Based on the materials of the sociological research, the role and relevance of student organizations in the implementation of educational work with students are determined. The theoretical and practical importance of the article lies in the fact that the features of student organizations are presented and the potential possibilities of student self-government as a social institution are analyzed. According to the results of the study, the authors have found that students in most cases join student organizations in order to expand the circle of acquaintances and are interested in the opportunity to make a career in the future.

Morphology and Rubisco turnover characteristics of perennial ryegrass breeding populations after two and four cycles of divergent selection for long or short leaf length

2013 ◽  
Vol 64 (7) ◽  
pp. 687 ◽  
Author(s):  
Edith N. Khaembah ◽  
François Gastal ◽  
Serge Carre ◽  
Louis J. Irving ◽  
Philippe Barre ◽  
...  
Keyword(s):  
Perennial Ryegrass ◽  
Morphological Traits ◽  
Dry Matter ◽  
Leaf Length ◽  
Elongation Rate ◽  
Leaf Elongation ◽  
Plant Yield ◽  
Leaf Elongation Rate ◽  
Selection For ◽  
Leaf Appearance

Perennial ryegrass populations previously subjected to two or four cycles of selection for short or long leaf length were studied to determine the response of morphological traits to selection and interaction to determine yield. Measured morphological traits were leaf length, leaf appearance interval, ligule appearance interval, leaf elongation duration, leaf elongation rate, tiller number, tiller dry weight, and herbage dry matter. Additionally, Rubisco concentration during leaf development was measured to determine the association of Rubisco turnover with morphological characteristics and yield. Rubisco was measured and modelled as a three-parameter (D, peak Rubisco concentration; G, time of D; and F, curve width measure), log-normal curve. Leaf length, leaf elongation rate, tiller weight, and plant dry matter diverged after two cycles of selection and further divergence occurred, with these traits being, respectively, 35, 28, 53, and 61% greater in the long- than the short-leaved plants after four cycles of selection. Opposite trends were displayed by Rubisco turnover, with selection for long leaves co-selecting for increased Rubisco turnover time and selection for short leaves resulting in increased leaf Rubisco concentration. There was indication of coupling of leaf appearance with Rubisco turnover. Across populations, multivariate analysis indicated that plant yield was associated with Rubisco concentration rather than Rubisco turnover. The association between higher yield and lower Rubisco concentration could be targeted in the breeding of high-yielding, nitrogen-efficient forage grasses. Plant yield was mainly associated with increased leaf area, indicating that yield could be improved by selecting for longer leaves and faster rates of leaf expansion.

scholarly journals Developmental genetics of leaf formation in Lolium 3. Inheritance of a developmental complex

1970 ◽  
Vol 16 (1) ◽  
pp. 17-28 ◽  
Author(s):  
K. J. R. Edwards
Keyword(s):  
Leaf Area ◽  
Leaf Size ◽  
Leaf Length ◽  
Developmental Genetics ◽  
Time Interval ◽  
Total Leaf Area ◽  
Total Leaf ◽  
Leaf Formation ◽  
Leaf Appearance ◽  
Rate Of Leaf Appearance

SUMMARYUsing four lines derived from a single base population of Lolium perenne by selection for large leaf size (LL), small leaf size (SL), fast rate of leaf appearance (FR), and slow rate of leaf appearance (SR), the inheritance of a number of related characters specifying various aspects of leaf development was studied. F1 and F2 generations were produced for all possible crosses between these four lines.The genetic differences between the selection lines were largely additive for all characters studied and entirely so for rate of leaf appearance, duration of elongation of a single leaf and for the time interval between the maturation of leaf 3 and the unfolding of the next youngest leaf on the same side of the apex, leaf 5. The non-additive variances noted in rate of total leaf area formation, individual leaf size and its components length and width, and in the rate of leaf elongation, were associated with a tendency towards heterosis in these characters. This was quite marked in some crosses and tended to be larger for the more complex characters, rate of total leaf area formation and leaf size, suggesting that the heterosis was, to a considerable extent, due to interactions between genes controlling component characters.The data confirmed the earlier finding that the negative correlated selection response between leaf size and rate of leaf appearance was due to a basic association between the maturation of a leaf and the unfolding (onset of rapid elongation) of the next youngest leaf on the same side of the apex. Thus an increase in rate of leaf appearance reduces the duration of elongation of a leaf and this in turn will reduce leaf length. However, the basic association, which seems to be controlled by vascular development of the young leaf, is not entirely invariate.

COMPLETION OF THE JUVENILE STAGE IN ORCHARDGRASS

1972 ◽  
Vol 52 (2) ◽  
pp. 203-207 ◽  
Author(s):  
V. KOZUMPLIK ◽  
B. R. CHRISTIE
Keyword(s):  
Juvenile Stage ◽  
Point Of View ◽  
Induction Treatment ◽  
Leaf Stage ◽  
Different Temperatures ◽  
Number Of Leaves ◽  
Leaf Appearance ◽  
Different Origins ◽  
Main Tiller ◽  
Rate Of Leaf Appearance

Three orchardgrass strains of different origins were used to determine the stage at which seedlings become capable of responding to induction treatment. The seedlings were grown under long photoperiods and warm temperatures after emergence until the sixth to ninth leaf appeared on the main tiller (shoot), and were then exposed to the induction conditions (10 hr photoperiod at 10 C) for 6 weeks. The juvenile stage in all three strains was completed at the eighth to ninth leaf stage. From the practical point of view, the eighth leaf stage can be used as an indicator of the completion, since about 90% of the seedlings induced at this stage subsequently developed heads, compared with 100% at the ninth leaf stage and 30–60% at the seventh leaf stage. Different photoperiods (14, 17, 24 hr) and different temperatures (15.5, 21 C), prior to the induction treatment, influenced the rate of leaf appearance, but did not affect subsequent heading. The maximum rate of leaf appearance occurred under long photoperiods (17 and 24 hr) and a warm temperature (21 C). Under these conditions, seedlings reached the eight-leaf stage in 3–4 weeks after emergence. The number of tillers was not as good a criterion of the completion of the juvenile stage as was the number of leaves on the main tiller.

scholarly journals Chlorophyll Fluorescence and Vegetative Propagation of Taxus

HortScience ◽  
2001 ◽  
Vol 36 (5) ◽  
pp. 971-975 ◽  
Author(s):  
Sarah E. Bruce ◽  
D. Bradley Rowe ◽  
James A. Flore
Keyword(s):  
Chlorophyll Fluorescence ◽  
Plant Stress ◽  
Photochemical Efficiency ◽  
Dry Weight ◽  
Visual Assessment ◽  
Taxus Baccata ◽  
Stock Plant ◽  
Plant Selection ◽  
Indirect Measure ◽  
Dark Green

Chlorophyll fluorescence over the course of stem cutting propagation was examined in 10 cultivars of Taxus ×media (Taxus baccata L. × T. cuspidata Sieb. & Zucc.), including `Brownii', `Dark Green Pyramidalis', `Dark Green Spreader', `Densiformis', `Densiformis Gem', `Hicksii', `L.C. Bobbink', `Runyan', `Tauntoni', and `Wardii'. The fluorescence value measured was the ratio of variable over maximum chlorophyll fluorescence (Fv/Fm). This value reflects the maximum dark-adapted photochemical efficiency of photosystem II (PSII) reaction centers involved in photosynthesis and is an indirect measure of plant stress. The objective of this study was to examine Fv/Fm as a method for stock plant selection and for monitoring rooting progress of various cultivars. Fv/Fm varied significantly (P ≤ 0.05) among cultivars, initially and over time. However, there was significant overlap among some cultivars. The Fv/Fm decreased dramatically during cold storage, but usually returned to original levels after several weeks in the propagation beds. This appeared to be a reflection of the reduction of water stress as the cuttings formed roots. Initial stock plant Fv/Fm was not correlated (P ≤ 0.05) with rooting percentage, root number, root dry weight, or root length, indicating that Fv/Fm is not a reliable indicator of stock plant rooting potential. Visual assessment is just as reliable.

scholarly journals Assessment of Agro-morphological Characters among Complete Panicle Emergence Mutants of Samba Mahsuri (BPT-5204)

2020 ◽  
pp. 113-125
Author(s):  
B. Suneel ◽  
P. Gopi ◽  
J. Karteek ◽  
M. D. Ershad ◽  
G. S. Laha ◽  
...  
Keyword(s):  
Flag Leaf ◽  
Field Evaluation ◽  
Visual Assessment ◽  
Morphological Characters ◽  
Leaf Length ◽  
Panicle Length ◽  
Phenotypic Data ◽  
Usual Procedure ◽  
Hand Weeding ◽  
Flag Leaf Length

Aims: The aim of the present work was to generate complete panicle emergence mutants of Samba Mahsuri (BPT-5204), using the chemical mutagen, ethyl methane sulphonate (EMS)  Place and Duration of Study: The field evaluation was carried out repeatedly in two locations at Indian Institute of Rice Research, Rajendranagar and at ICRISAT Patancheru Hyderabad. The duration of the study was three successive seasons in triplicates namely, june-2014, january-2015 and june-2015. Methodology: Seedlings of 28-30 days old were transplanted in 5 lines (each line containing 20 plants) into the field. The plant spacing was 20 cm by 15 cm with density of one hill. The field was irrigated throughout the experiment with average of 10 cm water above the soil level. Regular hand weeding was embarked upon to free the plant of inter specific competition. The phenotypic data was recorded for CPE mutants through visual assessment. The characteristics that required measurements were done according to the usual procedure. The Distinctness, Uniformity and stability of the CPE mutant lines have been recorded following (DUS) test guidelines by UPOV guidelines for rice (38) & Yoshida S (44). Results: The identified stabilized thirteen complete panicle emergence (CPE) mutants showed superior agro morphological characters, compared with wild type (BPT-5204). The mutants CPE-2 and CPE-3 took 100 days to flowering and CPE-4 and CPE-7 mutants showed superiority for panicle length, and CPE-5 exhibited good performance for grain yield. In correlation analysis CPE trait had a significantly positive correlation with PH and TGW and negative correlation with 50%DFF. The CPE mutants used in the present study exhibited variability for most of the studied traits. Significant variation was detected in the identified stabilized CPE mutants for plant height, panicle length, flag leaf length and width, 50% flowering, different grain types and 1000 grain weight. Conclusion: The present study discovered adequate genetic divergence in the thirteen stabilized CPE mutants for various qualitative and quantitative traits. The promising mutants identified during the current study have the potential to be used in future breeding programs for getting productive and quality results.

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