Cellular respiration depletes stored carbohydrates during extended periods of limited photosynthesis, e.g. winter dormancy or drought. As respiration rate is largely a function of temperature, the thermal conditions during such periods may affect non-structural carbohydrate (NSC) availability and, ultimately, recovery. Here, we surveyed stem responses to temperature changes in 15 woody species....

Brown flatsedge (Cyperus fuscus) is widely distributed in Europe, Asia, the Indian subcontinent, and the Mediterranean region of Northern Africa. It was apparently introduced into North America in the late 1800s and has steadily moved southward and westward. Brown flatsedge is reported new to Arkansas and Mississippi herewith. Field observations from early spring until frost were made between 2...

Frost events are of particular importance for plants. Its occurrence determines growing season. Early or late frost may cause injuries and damage in plants which have not yet entered dormancy fall/winter, flowering period winter/spring. Global average temperature increase has been accompanied by changes extreme events. Observations shown that there a decreasing pattern frequencies intensities I...

In the last few years, spring frosts have become more of a rule than an exception. There are several prevention measures available for growers and numerous being tested; however, fruitlets often affected to some extent. One common phenomena is development frost rings. The aim our study was evaluate how occurrence rings affects sugar, organic acid, phenol content in flesh peel cv. ‘Gala’ apples....

An observed increase in air temperature can lead to significant changes in the phenology of plants and, consequently, changes in agricultural production. The aim of the study was to evaluate the spatial differentiation of thermal resources in Poland and their variability during a period of changing thermal conditions in Europe. Since the variability of thermal conditions is of paramount importa...

Under climate change, the reduction of frost risk, onset of warm temperatures and depletion of soil moisture are all likely to occur earlier in the year in many temperate regions. The resilience of tree species will depend on their ability to track these changes in climate with shifts in phenology that lead to earlier growth initiation in the spring. Exposure to warm temperatures ('forcing') ty...

Xylem vessels of Prunus persica Batsch (peach) and Juglans regia L. (walnut) are vulnerable to frost-induced embolism. In peach, xylem embolism increased progressively over the winter, reaching a maximum of 85% loss of hydraulic conductivity (PLC) in early March. Over winter, PLC in walnut approached 100%, but the degree of xylem embolism varied during the winter, reflecting the ability of waln...

Cephalosporium stripe (fungus str ipe) is a vascular wi l ttype disease of wheat and barley, which also affects other cereals and grasses. l t is caused by the soifborne fungus Cephalosporium gramineum. ln autumn, the fungus produces millions of bacteria-sized spores (conidia), which are washed into the soil around the plant. These spores are the structures that will eventually infect the plant...