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heat stress

heat stress (GB)

For all organisms, heat means a state of stress and therefore also for plants like that Weinrteb, The rising temperatures in the course of climate change lead to lower productivity of important crops. Heat imbalances and affects cell metabolism photosynthesis, which is almost set at over 40 ° Celsius. Extreme heat can even be fatal to plants. For these reasons, plants have developed a variety of reaction mechanisms. Like humans, plants also try to protect themselves from heat through evaporation, which leads to a relatively quick cooling. This as evaporation designated process is through the stomata of the leaves controlled.

Heat stress - grapes and leaves

In connection with lower humidity, dry wind and strong sunshine are additional factors water stress, With increasing temperatures, the respiration, where the malic acid is decomposed. The result are low color and low acidity as well insipid tasting wines. The new breed heat tolerant varieties gains in importance in the context of these developments. Foam cress (Arabidopsis) is often used to study the heat reactions of plants. The plant's genome is comparatively simple and has already been fully decoded. See also under drought,

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