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Scientists attribute this process to water signaling. Water Signals Water signals are a way for plants to sense where water is located without directly measuring its levels. In this, they are helped by molecules that move along with the water through tiny pores inside the plant. When water enters a plant's roots, it travels through the outer cells. They contain a hormone that promotes branching auxin. The absorption of water activates it. If its access is cut off, the root has to rely on water from its own resources.
This redirects the movement of water so that it moves outward, disrupting the flow of auxin. Instead, another moible number data hormone kicks in. It closes all the small pores connecting the root cells. Scientists liken the process to bulkheads on a ship, which close automatically in the event of a fire. Root cells are isolated from each other, the free movement of auxin is stopped, and root branching is hindered. This simple system allows the roots to precisely adjust their shape to the water conditions.
Humidity adaptation The study also showed that plant shoots use a similar system to roots. Under drought conditions, the leaf closes the small pores on its surface by increasing the volume of abscisin, which prevents the flow of water through them. Tomatoes, lettuce, corn, to water scarcity in similar ways, even though they grow in different soils and climates. is a common feature of flowering plants. They can inhabit a wider range of ecosystems and environments than other species.
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發表於 2023-10-12 14:18:01