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The changing dynamics in the climate are the primary and important determinants of agriculture productivity. The effects of this changing climate on overall productivity in agriculture can be understood when we study the effects of individual components contributing to the changing climate on plants and crops. Elevated CO 2 (eCO 2 ) and drought due to high variability in rainfall is one of the important manifestations of the changing climate. There is a considerable amount of literature that addresses climate effects on plant systems from molecules to ecosystems. Of particular interest is the effect of increased CO 2 on plants in relation to drought and water stress. As it is known that one of the consistent effects of increased CO 2 in the atmosphere is increased photosynthesis, especially in C 3 plants, it will be interesting to know the effect of drought in relation to elevated CO 2 . The potential of elevated CO 2 ameliorating the effects of water deficit stress is evident from literature, which suggests that these two agents are brothers in arms protecting the plant from stress rather than partners in crime, specifically for water deficit when in isolation. The possible mechanisms by which this occurs will be discussed in this minireview. Interpreting the effects of short-term and long-term exposure of plants to elevated CO 2 in the context of ameliorating the negative impacts of drought will show us the possible ways by which there can be effective adaption to crops in the changing climate scenario.

Elevated CO2 and Water Stress in Combination in Plants: Brothers in Arms or Partners in Crime?