scholarly journals Ecological and biological features of annual ornamental plants under pre-winter sowing in a continental climate

2021 ◽  
Vol 10 (1) ◽  
pp. 142-150
Author(s):  
Mara Yanovna Sarlaeva ◽  
Olga Yurievna Vasilyeva
Keyword(s):  
Ornamental Plants ◽  
Ecological Group ◽  
Hydrothermal Conditions ◽  
Biological Features ◽  
Long Term Study ◽  
Centaurea Cyanus ◽  
Helichrysum Bracteatum ◽  
Calendula Officinalis L ◽  
Clarkia Unguiculata

The paper presents the results of a long-term study of biological features of annual ornamental plants species belonging to the ecological group of therophytes included in the bioresource collection USU 44053 and capable of creating a high ornamental effect after pre-winter sowing in the ground. The hydrothermal conditions of the wintering and subsequent vegetation periods are characterized. The accumulation of snow necessary for successful overwintering of seeds is analyzed. Comparative phenospectra of species under different cultivation methods are presented, with an emphasis on achieving the fruiting phase. Examples of naturalization of these species are given, which characterize their high adaptive potential. The most promising species for use in the urbanized environment of the Siberian region are: Amaranthus caudatus L., A. paniculatus L., Brachycome iberidifolia Benth., Calendula officinalis L., Centaurea cyanus L., Clarkia unguiculata Lindl., C. pulchella Pursh., Eschscholzia californica Cham., E. pulchella Cham., Gilia achilleifolia Benth., G. capitata Sims, G. tricolor Benth., Gypsophila elegans M. Bieb., Helichrysum bracteatum (Vent.) Andrews, Iberis umbellata L., Layia elegans Torr. A. Gray, Rudbeckia hirta L., Salpiglossis sinuata Ruiz Pav., Schizanthus pinnatus Ruiz Pav., Vaccaria hispanica (Mill.) Rauschert.

scholarly journals Methodical aspects of various biomorphs ornamental plants regeneration study

2018 ◽  
Vol 7 (4) ◽  
pp. 20-25
Author(s):  
Olga Yurievna Vasilyeva ◽  
Inna Yanovna Sarlaeva
Keyword(s):  
Callus Tissue ◽  
Ornamental Plants ◽  
Morphological Aspect ◽  
Entire Surface ◽  
Long Term Study ◽  
Positive Effect ◽  
Regeneration Study ◽  
Physiological And Biochemical

The paper raises the problem of conservation, maintenance, rejuvenation and accelerated reproduction of plant objects in bioresource collections using green cutting propagation. The authors describe experimental methods of herbaceous and woody plants regeneration study in agricultural, physiological-biochemical and morphological directions. In agricultural direction the main factors are the timing and methods of green cutting, as well as the microecological conditions in which regeneration takes place (humidity, temperature of the air and substrate). The physiological and biochemical aspect concerns the use of various growth stimulants, including concentrations and timing for the treatment of unruly cuttings. The reliable positive effect of the growth stimulants in comparison with control natural regeneration can be proved by the t-criteria. The morphological aspect shows features of callusogenesis and rhizogenesis. The most profound analysis is possible when representatives of generic complexes, species and varieties of various ecological, geographical and genetic origin are involved in the experiment. A highly informative classification of callusogenesis and rhizogenesis proposed by N.F. Dovbysh, N.A. Oleinik and G.A. Kudina (1993) is described in detail; in this classification three types of callus implantation are described: circular, focal and continuous, as well as five types of localization and development of roots. Root formation can occur 1) in the zone of the node, 2) from the callus tissue, 3) from the side of the bud and leaf trail, 4) over the entire surface of the internode, as well as 5) mixed (from the tissues in the node zone and from callus tissue). Based on the long-term study of the regeneration of shrub and herbaceous ornamental plants, the authors of the paper propose one more type - in the entire surface of the lower cut.

Quinapril for Sclerosis Failed in Long-Term Study

2007 ◽  
Vol 38 (6) ◽  
pp. 14
Author(s):  
DAMIAN MCNAMARA
Keyword(s):  
Term Study ◽  
Long Term Study

Theoretical and Methodological Problems of a 10-Year Follow-Up Program Evaluation Study

2002 ◽  
Vol 18 (3) ◽  
pp. 229-241 ◽  
Author(s):  
Kurt A. Heller ◽  
Ralph Reimann
Keyword(s):  
Program Evaluation ◽  
Evaluation Studies ◽  
Evaluation Study ◽  
Control Groups ◽  
Cross Sectional ◽  
Long Term Study ◽  
Partial Inclusion ◽  
Methodological Problems

Summary In this paper, conceptual and methodological problems of school program evaluation are discussed. The data were collected in conjunction with a 10 year cross-sectional/longitudinal investigation with partial inclusion of control groups. The experiences and conclusions resulting from this long-term study are revealing not only from the vantage point of the scientific evaluation of new scholastic models, but are also valuable for program evaluation studies in general, particularly in the field of gifted education.

Sign in / Sign up

Export Citation Format

Share Document