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In the text below, what does "water stress" mean?
Her work has already yielded some interesting details about how vines cope with water stress. The next step: to determine how those responses affect vine health and grape composition.
Plants have very specific requirements for water. Some can take a great deal of water [willows, mangroves], others need little water [cactus]. A plant that is not getting the correct amount is suffering water stress. In the case of the vines, it refers to the way in which they either adapt for reduced water or for over-watering.