Mutual feedbacks maintain both genetic and species diversity in a plant community. (1/1)
The forces that maintain genetic diversity among individuals and diversity among species are usually studied separately. Nevertheless, diversity at one of these levels may depend on the diversity at the other. We have combined observations of natural populations, quantitative genetics, and field experiments to show that genetic variation in the concentration of an allelopathic secondary compound in Brassica nigra is necessary for the coexistence of B. nigra and its competitor species. In addition, the diversity of competing species was required for the maintenance of genetic variation in the trait within B. nigra. Thus, conservation of species diversity may also necessitate maintenance of the processes that sustain the genetic diversity of each individual species. (+info)Amsinckia is a genus of plants in the borage family, Boraginaceae. It includes several species commonly known as fiddlenecks, which are native to North America. These annual or short-lived perennial herbs typically have narrow, lance-shaped leaves and tubular flowers that bloom in a distinctive coiled or "fiddlehead" shape. Some species contain pyrrolizidine alkaloids, which can be toxic to livestock and other animals if ingested in large quantities.
Here are some medical aspects related to Amsinckia:
1. Contact dermatitis: Some people may develop contact dermatitis after touching the plants, due to irritating compounds present in the leaves and stems.
2. Toxicity: Ingesting large amounts of Amsinckia species containing pyrrolizidine alkaloids can cause liver damage and other health issues in livestock such as horses, cattle, and sheep. However, humans are less likely to be affected due to their lower palatability and smaller quantities consumed.
3. Allergic reactions: Some individuals may experience allergic reactions after exposure to Amsinckia plants, including respiratory symptoms or skin rashes.
It is essential to exercise caution when handling Amsinckia species, especially if you are sensitive to related plants or have a history of allergies. If you suspect toxicity or severe allergic reactions, consult a healthcare professional immediately.