David Attenborough - Resurrection Plant, Totally Amazing Nature скачать в хорошем качестве

David Attenborough - Resurrection Plant, Totally Amazing Nature

The resurrection plant (Selaginella lepidophylla) is a remarkable plant that can survive almost complete desiccation, then resume normal metabolic activity upon rehydration. It is native to the Chihuahuan Desert of North America, where it has evolved to withstand the harsh conditions of drought. When water is scarce, the resurrection plant curls its fronds inwards into a ball shape, which helps to protect its delicate tissues from the sun and wind. It can remain in this dormant state for several years, until water becomes available again. Once it is rehydrated, the plant uncurls its fronds and begins to photosynthesize again. The resurrection plant has a number of adaptations that allow it to survive desiccation. One of the most important is its ability to protect its DNA from damage. When the plant dries out, its cells produce proteins that coat and protect the DNA. This prevents the DNA from being damaged by ultraviolet radiation and other environmental stresses. Another important adaptation is the plant's ability to control its metabolism. When the plant dries out, it slows down its metabolism to conserve energy. This allows it to survive for long periods of time without water. The resurrection plant can live for many years, even decades. The longest documented lifespan of a resurrection plant is over 50 years. However, the lifespan of an individual plant will vary depending on the conditions in which it is grown.