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Abstract
Have you ever seen a picture of a dinosaur and realized that there is a palm-like plant by its side? Maybe you have walked around your neighborhood and seen the same kind of plant there? Incredibly, those ancient plants, called cycads, have been around for millions of years. A single cycad plant can live up to 2,000 years! We think that the secret to cycads’ survival and long life lies inside a very special structure called the coralloid root, which has microbes living inside it. We studied these coralloid roots and found a high diversity of bacterial species living inside of them, more than anyone had ever imagined. When we took a closer look at these bacteria, we found that they can produce many compounds that can help them communicate among themselves and with the plant, transport nutrients, and perform other functions that are still a mystery.
Highlights
National Laboratory of Genomics for Biodiversity, Center for Research and Advanced Studies of the National Polytechnic Institute, Irapuato, Mexico
AGE: CYCAD Very ancient seed plants that have survived until our days
Have you ever seen a picture of a dinosaur and realized that there is a palm-like plant by its side? Maybe you have walked around your neighborhood and seen the same kind of plant there? Incredibly, those ancient plants, called cycads, have been around for millions of years
Summary
ENDOPHYTE Any organism that lives inside a plant. N can be taken up by certain organisms and converted into ammonium (NH ), which is a nutrient that cycads can use to live and grow Nitrogen fixation is one function performed by organisms called endophytes, which are microbes (bacteria, for example) that live inside of the coralloid roots. Most of the bacteria inside the coralloid roots seem to come from the soil closest to the roots, called the rhizosphere. Figure Many living creatures have appeared and disappeared from the planet, while cycads kept on living Their outside appearance is the same, but we think their roots have changed and are the secret for their survival. Figure Cycads, just like our bodies, have their own tiny bacterial helpers
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