1, the poem has gone away with the red leaves, and the dream is not broken.
2, the trees are full of autumn sounds, and the red leaves are autumn colors.
3, the west wind horse, the moon book lamp, the blue sky is difficult, the red leaves are cold in the Wujiang River.
The specific introduction of Hongye:
Red leaves, a kind of ornamental trees, mainly look at leaves, which are favored by literati in past dynasties. They were first seen in Sima Xiangru's Shang Fu Lin. There are red leaves all over the country, and Qianfo Mountain is also famous, but it is the most prosperous in the south of the mountain and the north of the mountain. Fang Ying Garden in the north of the mountain is dotted with colorful flowers.
Egg-shaped leaves, mixed flowers, rich fragrance, very attractive, and Feng Dan, torch, red-leaf plum, red-leaf tree set off more brightly. Shannan is opposite to Shanbei. It's very simple, with a large area, called 100 mu, covering the whole hillside. If you stroll along the winding path, you will see the street as welcome as a girl in red.
The branches on both sides are connected and look like a red corridor. Looking at the hillside, clusters and patches of cypresses are dotted with charm. If you meet the morning dew, it is more like red silk covered with red pearls, shining with gorgeous light.
Reason:
Leaves turn red because they contain a lot of anthocyanins. Anthocyanin, also known as red pigment, is located in the vacuole of leaf cells. It is different from other pigments in leaves and does not participate in photosynthesis. The main function of leaves is to obtain nutrients such as sugar and carbohydrates needed for tree growth through photosynthesis.
Chloroplast, as the place of leaf photosynthesis, contains not only chlorophyll that makes leaves appear green, but also carotenoids that make leaves appear yellow. In summer, the chlorophyll content in leaves is high, so bright green overshadows yellow. As the temperature drops, the days become shorter and chlorophyll is decomposed in large quantities. At this time, other pigments such as carotenoids submerged in leaves will be exposed.
Rhubarb, Rhubarb, is a small deciduous tree belonging to Rhus. Odd pinnate compound leaves alternate, oblong to lanceolate. The erect panicle is terminal and the spike is bright red. The fruit is oblate, with red bristles, which are closely clustered to form a torch. The fruit will not fall for a long time after ripening in September, and the leaves will turn red after autumn, which is very spectacular. Native to Europe and America, it often grows on open sand or gravel soil.