Scientists believe it likely that the two genes, PEN1 and SYP122, paved the way for all terrestrial plant life.Researchers from thehave shed new light on how plant life got established on the surface of our planet. They specifically demonstrated that two genes are crucial for terrestrial plants to protect themselves against fungal attack – a defense mechanism that dates back 470 million years. These defenses most likely paved the way for all terrestrial plant life.
“We found out that if we destroy these two genes in our model plant thale cress , we open the door for pathogenic fungi to penetrate. We found that they are essential to form this cell wall-like plug that defends against fungi.
“Since a fungus can only gain partial entry into a plant, we believe that a tipping point arises where both plant and fungus have something to gain. Therefore, it has been an advantage to maintain the relationship as is. The theory that plants tamed fungi to colonize land is not ours, but we are providing fodder that supports this idea,” says Mads Eggert Nielsen.The new results add an important piece to the puzzle of the evolutionary history of plants.
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