scholarly journals Wybrane zagadnienia z morfogenezy liści drzew. II. Występowanie młodocianych form liści w koronach drzew buka zwyczajnego (Fagus silvatica L.) [Studies on the mohprogenesis of tree-leaves. II. The occurrence of juvenile forms of leaves in the crowns of beech trees (Fagus silvatica L.)]

2015 ◽  
Vol 41 (4) ◽  
pp. 535-574 ◽  
Author(s):  
I. Więckowska
Keyword(s):  
Secondary Growth ◽  
Leaf Primordia ◽  
Late Spring ◽  
Tree Leaves ◽  
Spring Frost ◽  
Late Spring Frost ◽  
Fagus Silvatica ◽  
One Year

It was fairly often observed that <em>Fagus silvatica</em> L. leafed twice during one vegetational season. This secondary growth occurred on all trees, when the first leaves underwent destruction, e.g. in consequence of late spring frost. The leaves of secondary growth differed pronouncedly from normally developed ones by their shape and irregular nervation and were similar to the juvenile leaves of one-year-old seedlings of beech. Observations of leaf buds showed that the nerves appeared in leaf-primordia of <em>Fagus silvatica</em> as late as the latter part of July and if the secondary leaves developed at the end of July, they were normal in shape and bad regular nervation. Leaf-primordia compelled to an earlier development gave leaves of different form and irregular nervation.

scholarly journals Growth Recovery and Phenological Responses of Juvenile Beech (Fagus sylvatica L.) Exposed to Spring Warming and Late Spring Frost

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1604
Author(s):  
Kristine Vander Mijnsbrugge ◽  
Jessa May Malanguis ◽  
Stefaan Moreels ◽  
Amy Lauwers ◽  
Arno Thomaes ◽  
...  
Keyword(s):  
High Temperature ◽  
Fagus Sylvatica ◽  
Frost Damage ◽  
Late Spring ◽  
First Year ◽  
Spring Frost ◽  
Late Spring Frost ◽  
Fagus Sylvatica L ◽  
Second Year ◽  
One Year

Global change increases the risk of extreme climatic events. The impact of extreme temperature may depend on the tree species and also on the provenance. Ten provenances of Fagus sylvatica L. were grown in a common garden environment in Belgium and subjected to different temperature treatments. Half of the one year old seedlings were submitted to a high thermal stress in the spring of the first year, and all plants were exposed to a late spring frost in the second year. The high-temperature treated plants displayed reduced growth in the first year, which was fully compensated (recovery with exact compensation) in the second year for radial growth and in the third year for height growth. Frost in the spring of the second year damaged part of the saplings and reduced their growth. The frost damaged plants regained the pre-stress growth rate one year later (recovery without compensation). The high temperature treatment in the first year and the frost damage in the second year clearly influenced the phenological responses in the year of the event and in the succeeding year. Little population differentiation was observed among the provenances for growth and for phenological responses. Yet, a southern provenance, a non-autochthonous provenance (original German provenance that was planted in Belgium about a century ago) and a more continental provenance flushed earlier than the local Atlantic provenances in the year of the frost event, resulting in more frost damage. Some caution should therefore be taken when translocating provenances as an anticipation of the predicted climate warming.

scholarly journals Process-Based Indicators for Timely Identification of Apricot Frost Disaster on the Warm Temperate Zone, China

2021 ◽  
Author(s):  
Yang Jianying ◽  
Zhiguo Huo ◽  
Peijuan Wang ◽  
Wu Dingrong ◽  
Yuping Ma
Keyword(s):  
Economic Value ◽  
Temperate Zone ◽  
Late Spring ◽  
Cold Weather ◽  
Accurate Identification ◽  
Spring Frost ◽  
Late Spring Frost ◽  
Disaster Data ◽  
Warm Temperate Zone ◽  
Warm Temperate

Abstract Frequent occurrences of extreme cold weather processes create severe agricultural/forest frost events, even given the background of global warming. In the warm temperate zone of China, which is the largest planting area for fresh apricot, late spring frost disaster has become one of the major meteorological hazards during flowering. To prevent cold weather-induced apricot frost events and reduce potential losses in related fruit economic value, it is vital to establish a meteorological indicator for timely and accurate identification of cold weather process-based apricot frost events, to provide support for timely apricot frost monitoring and warning in late spring. In this study, daily minimax temperature (Tmin) and apricot frost disaster data during flowering were combined to establish meteorological identification indicators of apricot frost based on cold weather processes. A process-based apricot frost model (f(D,Tcum) was firstly constructed, and characteristics of (Tcum) (accumulated harmful temperature) were explored under different D (duration days) based on the representation of historical apricot frost processes. Thresholds for the (Tcum) for apricot frost in 1, 2, 3, 4 and more than 5 days of apricot frost process were determined as -1.51, -2.92, -4.39, -5.84 and − 7.31°C, respectively. Validation results by reserved independent disaster samples were generally consistent with the historical records of apricot frost disasters, with 89.00% accuracy for indicator-based identification results. Typical process tracking of the proposed identification indicator to an apricot frost event that occurred in North Hebei during April 3–9, 2018 revealed that the indicator-based identification result basically coincides with the historical disaster record and can reflect more detailed information about the apricot frost process.

Two Types of Late Spring Frost Injury to Winter Wheat 1

1947 ◽  
Vol 39 (6) ◽  
pp. 536-544 ◽  
Author(s):  
J. E. Livingston ◽  
J. C. Swinbank
Keyword(s):  
Winter Wheat ◽  
Late Spring ◽  
Spring Frost ◽  
Frost Injury ◽  
Late Spring Frost

Frost Damage to White Spruce Buds

1972 ◽  
Vol 2 (1) ◽  
pp. 62-63 ◽  
Author(s):  
J. R. Clements ◽  
J. W. Fraser ◽  
C. W. Yeatman
Keyword(s):  
Apical Meristem ◽  
White Spruce ◽  
Frost Damage ◽  
Late Spring ◽  
Time Of Death ◽  
Spring Frost ◽  
Late Spring Frost ◽  
Understory Trees

Unopened buds of white spruce (Piceaglauca (Moench) Voss) were damaged by late spring frost. At time of death of the apical meristem the buds were not ready for flushing. As expected on the basis of ground frosts, there was more damage among shorter trees than among taller trees, and more damage among open-grown trees than among understory trees.

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