Inheritance and correlations of frost injury, growth, flowering, and cone characteristics in white spruce, Piceaglauca (Moench) Voss

1985 ◽  
Vol 15 (3) ◽  
pp. 498-504 ◽  
Author(s):  
Hans Nienstaedt
Keyword(s):  
White Spruce ◽  
Frost Damage ◽  
Growth Potential ◽  
Ottawa River ◽  
Frost Injury ◽  
Growth Initiation ◽  
High Heritability ◽  
Lake States ◽  
Spring Frosts ◽  
The Impact

White spruce progenies from the Lake States (61) and from the Ottawa River Valley, Ontario (31), were tested in north-central Wisconsin. Transplants were raised in nurseries in Wisconsin and Ontario and planted in 1969 in an open field after thorough weed control. Observations in the Wisconsin nursery and in the field between 1971 and 1979 are reported. They included heights, frost damage, spring vegetative growth phenology, strobili production, and three cone characteristics. The discussion concentrates on the relationships between heights and the other measured characteristics. Frost damage proved difficult to assess. In the year of frost, damage is severe, a 50% growth reduction, and the fastest growing trees are most severely damaged. However, in environments with only occasional late spring frosts, permanent damage is negligible. Spring growth initiation was not correlated significantly with total height growth or frost damage. Breeding of late-flushing genotypes that can avoid frost damage is questionable in spite of the high heritability for flushing. Female strobili production was substantial at age 10 years, male production was not. Even so, generation turnovers of 10–15 years may be possible. The impact of fecundity on growth potential is discussed as it relates to multigeneration breeding.

scholarly journals RESULTS OF MANDARIN PLANTATIONS MONITORINGDAMAGED BY FROST AND EVALUATION IN GEORGIA

2021 ◽  
Author(s):  
N. Khalvashi ◽  
◽  
G. Memarne ◽  
D. Baratashvili ◽  
N. Kedelidze ◽  
...  
Keyword(s):  
Global Warming ◽  
Low Temperatures ◽  
Frost Damage ◽  
Climatic Conditions ◽  
Limiting Factor ◽  
Citrus Production ◽  
History Of ◽  
Degree Of Damage ◽  
Spring Frosts ◽  
The Impact

n the paper isdiscussedthe results of mandarin plantations monitoring damaged by frost in winter. Despite thecenturies-old history of citrus production in Georgia, the danger of frost damageremains a major limiting factor for the spread of citrus. The monitoring revealed that although the temperature was quite critical for mandarin in February 2020 (-11-12°C, in some places -14°C), the frost damage to the plantations was not high, but was inhomogeneous. Observations revealed that the damage to mandarin plantations was due not only to the impact of low temperatures, but also to many other factors that had a significant impact on the degree of damage to the plantations. Based on the analysis ofmonitoring results and multi-year data, it was found that the risk of frost damage to the citrus in winter in Georgia due to global warming is significantly reduced comparedto previous years, but the incidence of autumn-spring frosts has increased which indicates the adaptation of the citrus crops to the climatic conditions of Georgia.

FROST DAMAGE IN FLOWERS AND IMMATURE FRUITS OF Amelanchier alnifolia NUTT. (MALOIDEAE)

1983 ◽  
Vol 63 (2) ◽  
pp. 461-466 ◽  
Author(s):  
A. RANDALL OLSON ◽  
TAYLOR A. STEEVES
Keyword(s):  
Ovarian Tissue ◽  
Frost Damage ◽  
Wild Populations ◽  
Amelanchier Alnifolia ◽  
Inferior Ovary ◽  
Tissue Degeneration ◽  
Naturally Occurring ◽  
Histological Damage ◽  
Frost Injury ◽  
Spring Frosts

Flower buds, blossoms, and immature fruits from wild populations of Amelanchier alnifolia Nutt. (Maloideae) were examined for histological damage resulting from naturally occurring spring frosts. Floral tissues become vulnerable to frost injury at anthesis. Tissue degeneration appears to be restricted to what has been interpreted as carpel in the typical pomoid, inferior ovary. An understanding of certain phenological and ovarian tissue susceptibilities may contribute to the evaluation of new cultivars with the potential for circumventing the threat of cold injury.Key words: Fruit, carpel, inferior ovary, Amelanchier alnifolia

scholarly journals OVER-WINTER STORAGE OF CONIFEROUS SEEDLINGS AS A MEANS OF PREVENTING LATE FROST DAMAGE

1962 ◽  
Vol 38 (2) ◽  
pp. 192-202 ◽  
Author(s):  
E. Jorgensen ◽  
W. K. L. Stanek
Keyword(s):  
White Spruce ◽  
Frost Damage ◽  
Conclusive Evidence ◽  
Northern Ontario ◽  
Late Frost ◽  
Series Of Experiments ◽  
Spring Frosts

In a series of experiments on over-winter storage, seedlings of white spruce and other conifers were placed in normal shipping hales and stored in root cellars without artificial refrigeration. White spruce seedlings were retained in dormant condition for approximately six months without apparent damage to their later performance in plantations. Stored seedlings proved highly resistant to damage from spring frosts and therefore superior to spring-shipped stock from the same nursery beds. Conclusive evidence of the suitability of other conifers for over-winter storage was not obtained. The application of over-winter storage of white spruce seedlings in planting operations in northern Ontario is discussed.

scholarly journals Age-Dependent Decline in Neuron Growth Potential and Mitochondria Functions in Cortical Neurons

Cells ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1625
Author(s):  
Theresa C. Sutherland ◽  
Arthur Sefiani ◽  
Darijana Horvat ◽  
Taylor E. Huntington ◽  
Yuanjiu Lei ◽  
...  
Keyword(s):  
Cortical Neurons ◽  
Traumatic Injury ◽  
Axon Growth ◽  
Neurite Growth ◽  
Growth Potential ◽  
Mitochondrial Functions ◽  
Cord Injury ◽  
Age Dependent ◽  
Mitochondria Functions ◽  
The Impact

The age of incidence of spinal cord injury (SCI) and the average age of people living with SCI is continuously increasing. However, SCI is extensively modeled in young adult animals, hampering translation of research to clinical applications. While there has been significant progress in manipulating axon growth after injury, the impact of aging is still unknown. Mitochondria are essential to successful neurite and axon growth, while aging is associated with a decline in mitochondrial functions. Using isolation and culture of adult cortical neurons, we analyzed mitochondrial changes in 2-, 6-, 12- and 18-month-old mice. We observed reduced neurite growth in older neurons. Older neurons also showed dysfunctional respiration, reduced membrane potential, and altered mitochondrial membrane transport proteins; however, mitochondrial DNA (mtDNA) abundance and cellular ATP were increased. Taken together, these data suggest that dysfunctional mitochondria in older neurons may be associated with the age-dependent reduction in neurite growth. Both normal aging and traumatic injury are associated with mitochondrial dysfunction, posing a challenge for an aging SCI population as the two elements can combine to worsen injury outcomes. The results of this study highlight this as an area of great interest in CNS trauma.

scholarly journals Research on the Economic Development Threshold Effect of the Employment Density of the Shanghai Consumer Goods Industry in the Context of New Manufacturing, Based on the Experience Comparison with International Metropolis

Mathematics ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 969
Author(s):  
Lei Shen ◽  
Xi Zhang ◽  
Hongda Liu ◽  
Pinbo Yao
Keyword(s):  
Economic Development ◽  
Population Density ◽  
Consumer Goods ◽  
Inflection Point ◽  
Growth Potential ◽  
Positive Trend ◽  
Employment Density ◽  
Consumer Goods Industry ◽  
The Impact ◽  
Development Threshold

With the rise of a new generation of technology and industrial changes, the service-oriented manufacturing industry has become the direction of future development. With the background of new manufacturing, this paper constructs an economic development threshold model of employment density of consumer goods industry based on data from Shanghai and Tokyo from 2007 to 2016, and empirically analyzes the impact of the employment density of the consumer goods industry on urban economic development under different population densities. At the same time, by comparing the experience of Tokyo, the development status and prospects of Shanghai’s consumer goods industry are explored. The study found that the threshold of Tokyo’s consumer goods industry is 0.608. When population density is lower than this threshold, the consumer goods industry continues to promote the economic development of Tokyo; however, when the population density is higher than this threshold, the consumer goods industry begins to inhibit the economic development of Tokyo. The Shanghai consumer goods industry threshold is 0.329. Under the threshold, most of the consumer goods industry contributions to the economy are negative, but above the threshold, they begin to show a positive trend. The inflection point of the effect curve of Tokyo’s consumer goods industry on economic development has appeared, but the inflection point of Shanghai’s consumer goods industry has not yet appeared. Compared with Tokyo, the economic vitality of Shanghai’s consumer goods industry has not yet been fully released. With the continued increase of population density in Shanghai, the growth potential of the consumer goods industry is huge, and it is expected to reshape the flourishing age of Shanghai’s light industry brand.

scholarly journals Winter frost injury of buds on one-year-old grapevine shoots of Vitis vinifera cultivars and interspecific hybrids in Poland

2012 ◽  
Vol 24 (1) ◽  
pp. 97-103 ◽  
Author(s):  
Jerzy Lisek
Keyword(s):  
Vitis Vinifera ◽  
Interspecific Hybrids ◽  
Frost Damage ◽  
Frost Tolerance ◽  
Table Grape ◽  
Plant Parts ◽  
Frost Injury ◽  
Vitis Labruscana ◽  
Significant Damage ◽  
One Year

Winter frost injury of buds on one-year-old grapevine shoots ofVitis viniferacultivars and interspecific hybrids in PolandFollowing the winter of 2009/2010, an assessment of frost damage was carried out on the vines of 40 wine cultivars and 32 table grape cultivars grown in central Poland (Skierniewice, latitude 51° 57' N, longitude 20° 08' E). The minimum winter temperature of -28.1°C was recorded on 26 January 2010. Cultivars were assigned to five classes of different frost tolerance, according to information on the percentage of frozen buds: very resistant (below 1.9%), resistant (2 - 24.9%), medium susceptible (25 - 74.9%), susceptible (75 - 95.9%) and very susceptible (above 96%). The numbers of wine and table cultivars in each class were as follows: very resistant - 5 (wine) and 3 (table), resistant - 2 and 5, medium susceptible - 15 and 10, susceptible - 13 and 9 and very susceptible - 5 and 5. The most tolerant were the ‘Alwood’, ‘Delaware’, ‘Fredonia’ and ‘Zilga’ interspecific hybrids of theVitis labruscanagroup; the ‘Aurore’, ‘Marechal Foch’ and ‘Leon Millot’ hybrids originating fromV. vinifera, V. rupestris, V. ripariaandV. lincecumiiand ‘Sibera’ originating fromV. viniferaandV. amurensis.More than 96% of buds froze on the vines of some interspecific hybrids (‘Arkadia’, ‘Fanny’, ‘Kodrianka’ and ‘Lilla’). ‘Ortega’, ‘Nektar’, ‘Cserszegi Fueszeres’, ‘Riesling’ and ‘Chasselas Dore’ from theV. viniferacultivars showed the best tolerance to frost damage (42.5-62% of frozen buds). The buds of theV. viniferacultivars ‘Acolon’, ‘Dakapo’ and ‘Favorit’ all froze. Plant parts covered with soil and snow were not exposed to significant damage, even in the case of susceptible cultivars.

The relationship between multiple leaders and mechanical and frost damage to the apical meristem of Scots pine seedlings

1990 ◽  
Vol 20 (3) ◽  
pp. 280-284 ◽  
Author(s):  
Jarmo K. Holopainen
Keyword(s):  
Scots Pine ◽  
Apical Meristem ◽  
Dry Weight ◽  
Frost Damage ◽  
Night Temperature ◽  
Shoot Dry Weight ◽  
Frost Injury ◽  
Pine Seedlings ◽  
Before And After ◽  
Multiple Leaders

The responses of young Scots pine seedlings to mechanical apical meristem damage before and after 4 nights exposure to minimum night temperatures of −2.2 and −6.7 °C in controlled environment growth chambers were compared with control seedlings that were subjected or not to apical meristem damage and exposed to a minimum night temperature of 12 °C. The feeding damage caused by Lygus bugs was simulated by piercing the apical meristem of young pine seedlings with a hypodermic syringe needle and injecting a small drop of distilled water into the wound. At −6.7 °C increased numbers of dead seedlings were found. The proportion of seedlings with multiple leaders greatly increased after piercing, and about half of the seedlings subjected to the apical meristem damage had multiple leaders. The proportion of seedlings with multiple leaders and the number of leader shoots per seedling did not differ among seedlings subjected to apical meristem damage before or after the frost exposure. Short and twisted primary needles occurred in the basal parts of the new shoots in the seedlings with multiple leaders. Seedlings with necrotic needles were most often found after exposure to the night temperature of −6.7 °C. Shoot dry weight and length were significantly lower in seedlings subjected to apical meristem damage after frost exposure than in seedlings subjected to apical meristem damage before frost exposure or to no frost exposure. The results suggest that an increased reduction in growth is to be expected if Lygus bug attacks occur on pine seedlings that already suffer from frost injury.

Field survey on frost damage to roof tiles under climatic conditions

2016 ◽  
Vol 34 (2) ◽  
pp. 135-149 ◽  
Author(s):  
Chiemi Iba ◽  
Ayumi Ueda ◽  
Shuichi Hokoi
Keyword(s):  
Field Survey ◽  
Winter Season ◽  
Frost Damage ◽  
Climatic Conditions ◽  
Weather Data ◽  
Measured Temperature ◽  
Content Type ◽  
Roof Tile ◽  
Deterioration Process ◽  
The Impact

Purpose – Frost damage is well-known as the main cause of roof tile deterioration. The purpose of this paper is to develop an analytical model for predicting the deterioration process under certain climatic conditions. This paper describes the results of a field survey conducted to acquire fundamental information useful to this aim. Design/methodology/approach – A field survey of roof tile damage by freezing was conducted in an old temple precinct in Kyoto, Japan. Using detailed observations and photographic recordings, the damage progress was clarified. To examine the impact of climatic conditions upon the damage characteristics, weather data and roof tile temperatures were measured and logged in the winter season. Findings – The deterioration process was observed under the climatic conditions associated with the measured temperature of the roof tiles. In particular, it was revealed that the orientation has a significant influence on increasing or decreasing the risk of frost damage. For certain distinctive forms of damage, the deterioration mechanisms were estimated from the viewpoint of the moisture flow and temperature distribution in the tile. Originality/value – This study contributes to the elucidation of the mechanism behind frost damage to roof tiles. The findings will guide the construction of a numerical model for frost damage prediction.

POSSIBILITIES OF IMPLEMENTING THE SMART DEVELOPMENT CONCEPT IN RURAL AREAS FROM A BUSINESS PERSPECTIVE. THE EXAMPLE OF EASTERN POLAND

2021 ◽  
Vol XIII (1) ◽  
pp. 100-112
Author(s):  
Magdalena Anna Zwolińska-Ligaj
Keyword(s):  
Rural Areas ◽  
Institutional Environment ◽  
Descriptive Analysis ◽  
Smart Growth ◽  
Local Environment ◽  
Growth Potential ◽  
Opinion Poll ◽  
Local Sector ◽  
Endogenous Potential ◽  
The Impact

The aim of this paper was the evaluation of the impact of selected background conditions for implementing the smart village concept in the opinion of entrepreneurs. The assessment was based on an opinion poll on a sample of 240 entrepreneurs from three regions of Eastern Poland, using a questionnaire. The results were presented using descriptive analysis, including a comparative analysis of areas with low and high levels of smart growth potential. The presented results show that rural areas in the abovementioned regions, in general, create disadvantageous conditions for enhancing innovativeness through business activity, and the surveyed agents are characterised by a low level of innovativeness. In the opinion of the surveyed entrepreneurs, on the impact of selected factors on enterprise innovativeness, the potential impact of the local environment is above average. The findings point to a need to develop the endogenous potential of rural areas from peripheral regions by increasing access to modern ITC infrastructure and the role of the institutional environment in the process of knowledge transfer to the local sector of companies, the development of local connections in the business sector and within the scope of cooperation of local authorities with entrepreneurs.

Sign in / Sign up

Export Citation Format

Share Document