For Sustainable Crop Production: The First Discovery of a Plant Transceptor Which Directly Senses Nutrient Concentrations During the Transport Cycle
Plants take up and translocate nutrients through transporters (Keyword 1). Boron (B) is essential for plant growth and survival due to its function in cross-liking pectin in the cell wall. Similar to most essential nutrients, excessive supply of B inhibits plant growth. Since both B deficiency and toxicity are agricultural problems worldwide, it is important to understand the mechanisms for plants to cope with changing B conditions.
Using Arabidopsis (Keyword 2) as a model plant, we revealed that BOR1, a key transporter for B translocation in plants, is a transporter-receptor—a so-called “transceptor”. Our results suggested that BOR1 directly senses the B concentration during the transport cycle and promotes its own degradation under high-B conditions. This is a simple and efficient mechanism for maintenance of nutrient acquisition at appropriate levels. This finding will lead to develop plants or methods for sustainable crop production with reduced fertilizer use.
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