توضیحات
Hibiscus mutabilis, also known as the Confederate rose, Dixie rosemallow, cotton rose or cotton rosemallow, is a plant long cultivated for its showy flowers. Originally native to southern China and Taiwan, it is now found on all continents except Antarctica
Confederate roses tend to be shrubby or treelike in zones 9 and 10, though they behave more like perennials further north. Flowers can be double or single and are 4–6 in (10–15 cm) in diameter; they open white or pink, and change to deep red by evening. The ‘Rubra’ variety has red flowers. Single blooming flowers are generally cup-shaped. Bloom season usually lasts from summer through fall. Propagation by cuttings root easiest in early spring, but cuttings can be taken at almost any time. When it does not freeze, the Confederate rose can reach heights of 12–15 ft (3.7–4.6 m) with a woody trunk; however, a much bushier plant 5–6 ft (1.5–1.8 m) high is more typical and provides more flowering. These plants have a very fast growth rate. The Confederate rose was at one time very common in the area of the Confederate States of America, which is how its common name was derived. It grows well in full sun or partial shade, and prefers rich, well-drained soil
Floral color change occurs in Hibiscus mutabilis when flowers are white in the morning, turning pink during noon and red in the evening of the same day. Under laboratory conditions, the color change of the petals was slower than that of flowers under outdoor conditions. Temperature may be an important factor affecting the rate of colour change as white flowers kept in the refrigerator remain white until they are taken out to warm, whereupon they slowly turn pink
The red flowers remain on plants for several days before they abort. Weight of a single detached flower was 15.6 g (0.55 oz) when white, 12.7 g (0.45 oz) when pink and 11.0 g (0.39 oz) when red. Anthocyanin content of red flowers was three times that of pink flowers and eight times that of white flowers. There was a significant increase in phenolic content with color change. Overall ranking of antioxidant properties of H. mutabilis flowers was red > pink > white
Subramanian and Nair postulated that anthocyanins in pink and red flowers of H. mutabilis are synthesized independently since there is no reduction in phenolic content. However, Lowry suggested that anthocyanins are formed through direct conversion from flavonols as they have structural similarities
درخت ختمی رنگارنگ ، درختی از خانوائه ختمی است مانند تمام گل های ختمی زیبا، مقاوم و پرگل هستند. اما نکته جالب در مورد این درخت گل این است که گل های آن صبح ها سفید و تا غروب به رنگ صورتی تا قرمز می شوند. این یکی از حیرت انگیزترین جلوه های طبیعت است که بیشتر غیر واقعی به نظر می رسد. گلها تا چند روز روی گیاه باقی می مانند ولی فقط صبح روز اول سفید هستند و روزهای بعد قرمز رنگ می شوند. و طی روزهای مختلف که گلهای جدید سفید باز میشوند و گلهای قدیمی تر قرمز روی گیاه وجود دارند زیبایی بی نظیر را به وجود می آورند
