scholarly journals State evaluation of some Hydrangea macrophylla (Thunb.) varieties after winter hardiness in the agrometeorological conditions of central Russia

2021 ◽  
Vol 6 (48) ◽  
pp. 36-36
Author(s):  
Liliya Ahmetova ◽  
Darya Semenova ◽  
Olga Molkanova ◽  
Hasyan Sharafutdinov
Keyword(s):  
Comparative Analysis ◽  
Frost Resistance ◽  
Landscape Design ◽  
Winter Hardiness ◽  
Central Russia ◽  
Hydrangea Macrophylla ◽  
State Evaluation ◽  
Effective Technology ◽  
Total Growth ◽  
Ornamental Crops

Hydrangea macrophylla (Thunb.) Ser. is one of the most popular ornamental crops, used in landscape design. This article represents the study of the variety resistance of species and influence their of climatic change. In that sense the effective technology of plant shelter for the winter hardiness can be considered as a successful important factor for the promotion of this crop in northern area. Wherefore we consider in a comparative analysis of H. macrophylla varieties Forever & Ever Blue and Peppermint, which we carried out after winter hardiness in the conditions of central Russia. The most reliable and proven way to shelter for winter of hydrangea is the shelter of lutrasil, which contributed to an increase in the viability of shoots and the amount awakened buds, and also provided the better growth of shoots during the month. The highest percentage of overwintered shoots (77,8%), the amount of vegetative and generative buds (19,3±1,3 сm и 9,6±0,7 сm., respectively) and the total growth of shoots in spring (10,2 cm) were characteristic for variety Forever & Ever Blue for using lutrasil as a shelter. Keywords: HYDRANGEA MACROPHYLLA, VARIETIES, WINTER HARDINESS, FROST RESISTANCE, VIABILITY, SHELTER

Study of the frost tolerance and winter hardiness of emmer (Triticum turgidum ssp. dicoccon) genebank accessions under natural and artificial conditions

2003 ◽  
Vol 51 (3) ◽  
pp. 289-295
Author(s):  
G. Kovács ◽  
A. F. Bálint ◽  
J. Sutka
Keyword(s):  
Genetic Resources ◽  
Frost Resistance ◽  
Triticum Turgidum ◽  
Frost Tolerance ◽  
Winter Hardiness ◽  
Economic Situation ◽  
Acceptable Level ◽  
Traditional Foods ◽  
Public Data ◽  
Increasing Demand

The growing interest in emmer cultivation has no doubt been stimulated by the increasing demand for traditional foods with an image of naturalness, especially on the organic market. The new economic situation could stimulate the breeding and production of emmer as the source of an especially valuable foodstuff. It is the task of breeders to produce emmer varieties that can survive even the hardest winter occurring in the targeted cultivation area without serious damage. The best sources to improve the winter hardiness are probably the emmer genetic resources stored in genebanks. Unfortunately no public data are available on the frost tolerance and winter hardiness of the various genebank accessions. In the present research the frost tolerance and winter hardiness of 10 winter emmer genebank accessions were studied under nursery and phytotronic conditions. The results suggest that the majority of the populations studied are frost-sensitive, and only few landraces have an acceptable level of winter hardiness and frost resistance.

scholarly journals Comparative assessment of apricot seedlings for drought resistance and winter hardiness in Dagestan

2019 ◽  
pp. 199-207
Author(s):  
D. M. Anatov ◽  
Z. M. Asadulaev ◽  
R. M. Osmanov
Keyword(s):  
Comparative Analysis ◽  
Linear Relationship ◽  
Water Content ◽  
Drought Resistance ◽  
Winter Hardiness ◽  
Comparative Assessment ◽  
Average Level ◽  
Significance Level ◽  
Shoot Damage ◽  
Water Holding

The article presents a comparative analysis of the water-holding ability of leaves (WAL) and its connection with the freezing of the shoots of apricot seedlings of various ecological and geographical origins. A non-linear relationship was found between the WAL of the leaves of apricot seedlings and the freezing of the shoots. It was revealed that seedlings with shoot damage to the average level, WAL are higher (12-15% water content in leaves after 24 hours) than those with slightly submerged (0.8-6%). In severely freezing genotypes (freezing 60-100%), on the contrary, is lower than winter-hardy. The correlation before the peak was 0.79 *, after the peak -0.98 *, significant at the 0.05 significance level.

Seasonal changes in the composition of winter wheat plants, in relation to frost resistance

1926 ◽  
Vol 16 (4) ◽  
pp. 522-538 ◽  
Author(s):  
R. Newton ◽  
W. R. Brown
Keyword(s):  
Moisture Content ◽  
Winter Wheat ◽  
Seasonal Changes ◽  
Frost Resistance ◽  
Winter Hardiness ◽  
Active Cell ◽  
The Press ◽  
Plant Constituents

1. The adaptation of plants to resist frost appears to depend on seasonal changes which give the protoplasm stability. A study has been made of the changes occurring in winter wheat plants, of varieties differing widely in winter hardiness, during the fall and winter months.2. By analysing the press-juice as well as the entire tissues at progressive dates, it has been possible to study the distribution of the more important constituents between the physiologically active cell fluids and the relatively inert supporting framework.3. One of the most important changes in the quantitative relations of the various plant constituents is the reduction in moisture content. This takes place to a greater degree in hardy varieties. The resulting concentration of colloids and sugars in the cell fluids increases the resistance to freezing.

scholarly journals Organic antioxidant dynamics in Hydrangea macrophylla Ser. leaves in humid subtropics of Russia

2021 ◽  
pp. 25-31
Author(s):  
V. I. Malyarovskaya ◽  
V. N. Bekhterev ◽  
O. G. Belous
Keyword(s):  
Organic Content ◽  
Climatic Conditions ◽  
Gas Chromatography Mass Spectrometry ◽  
Adaptive Responses ◽  
Hydrothermal Conditions ◽  
Leaf Extracts ◽  
Introduced Plants ◽  
Hydrangea Macrophylla ◽  
Ornamental Crops ◽  
Humid Subtropics

Subtropical ornamental crops have been cultivated and studied in the humid subtropics of Russia for over a century. Nevertheless, a comprehensive evidence on their adaptation and stress is rather scarce for the region. The climatic conditions in Russian humid subtropics may occur extreme to introduced plants, which warrants research into their adaptive reactions to soil aridity and summer temperatures over +30 C°. Given the situation, understanding the mechanisms of main stressor-adaptive responses is relevant in ornamental crops, including Hydrangea macrophylla Ser. Gas chromatography-mass spectrometry  was  employed  to study ethanol leaf extracts in various-hardiness Hydrangea macrophylla Ser. cultivars, relatively hardy (Draps Wonder, Admiration, Altona), medium-hardy  (Souer Theresa) and susceptible (Harlequin, Madame Faustin) forms. Eleven endogenous organic compounds have been identified, of most interest being antioxidants and stress-protectants, including diarylethylene aromatic hydrocarbons (2,4’-dihydroxystilbene), squalene and phytosterines (y/p-sitosterol). The organic leaf content changed in response to hydrothermal stress in H. macrophylla, with a maximal concentration (2,4’-dihydroxystilbene 14.0, sitosterol 5.7 %) observed in favourable hydrothermal conditions of April, and minimal —  in the first August decade (8.5 and 1.7 %, respectively). Meanwhile, the relatively hardy Draps Wonder, Admiration and Altona varieties possessed the highest organic content of 2,4’-dihydroxystilbene (18.4,  21.5,  21.6 %) and y/p-sitosterol (5.7,  7.5,  6.0 %) both in optimal and stressing times. The lowest synthesis in the periods was observed in the unstable H. macrophylla varieties, Madame Faustin (6.9 and  1.1 %) and Harlequin (7.6 and  1.4 %).

scholarly journals Vegetative Propagation of Deciduous Rhododendrons using Root Stimulating Agents

2021 ◽  
Vol 38 ◽  
pp. 00121
Author(s):  
Z.I. Smirnova ◽  
I.A. Bondorina
Keyword(s):  
Vegetative Propagation ◽  
Green Building ◽  
Winter Hardiness ◽  
Optimal Conditions ◽  
The Urals ◽  
North West ◽  
The North ◽  
Central Russia ◽  
Deciduous Shrubs ◽  
Selection Of

The genus Rhododendron L. is the largest in the heather family Ericaceae DC. Rhododendrons are decorative evergreen, semi-evergreen and deciduous shrubs that have gained great popularity in green building, ornamental gardening and breeding. Among all groups of rhododendrons, deciduous are the most promising for cultivation in Central Russia due to their high winter hardiness, unpretentiousness and exceptional decorative effect. The article presents the results of experiments carried out at the GBS RAS in 2017-2020 on vegetative propagation of 50 species and varieties of deciduous rhododendrons. Vegetative propagation of deciduous rhododendrons is a rather laborious long process. Cutting deciduous rhododendrons has its own nuances and is considered problematic. In this regard, the selection of optimal conditions for the propagation of rhododendrons, which can enrich the cultural flora of the North-West, central Russia, the Urals and Siberia, was the main goal of this work.

Sign in / Sign up

Export Citation Format

Share Document