What is it about?
Deserts of the U.S. Southwest are extreme habitats for most plants, but, remarkably, microscopic green algae live there that are extraordinarily tolerant of dehydration. These tiny green algae (many just a few microns in size) live embedded in microbiotic soil crusts, which are characteristic of arid areas and are formed by communities of bacteria, lichens, microalgae, fungi, and even small mosses. After completely drying out, the algae can become active and start photosynthesizing again within seconds of receiving a drop of water.
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Why is it important?
How are they so resilient? Understanding the mechanisms that allow the survival of these desert-evolved green microalgae is the question is at the core of our research. These green microalgae are green plants, sharing physiology, cellular structure, and part of their evolutionary history with seed plants. Given the intensified droughts and altered precipitation patterns predicted as the global climate warms, understanding the adaptations that facilitate green plant survival in arid environments is pressing.
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This page is a summary of: Shared up-regulation and contrasting down-regulation of gene expression distinguish desiccation-tolerant from intolerant green algae, Proceedings of the National Academy of Sciences, July 2020, Proceedings of the National Academy of Sciences,
DOI: 10.1073/pnas.1906904117.
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