What characterizes a citrus tree

Citrus consists of: roots, stems, leaves, flowers and fruit. Small tree. Leaves simple compound, winged leaves usually narrow, or only traced, blade lanceolate, elliptic or broadly ovate, highly variable in size, often notched at the tip, midrib forked and branched from the base to near the notch, leaf margins at least in the upper part usually with obtuse or crenate teeth, rarely entire. Flowers solitary or in clusters of 2-3; calyx irregularly 5-3-lobed; petals usually less than 1.5 cm long; stamens 20-25, style slender, stigma capitate. The leaf blade of Citrus aurantium is an evergreen simple compound leaf, consisting of a leaf body and leaf wings. The leaf wings are attached to the petiole. Leaves vary in size and shape depending on the variety of citrus species. Roots consist of a group of primary roots, lateral roots, fibrous roots, and very short root hairs attached to the ends of the fibrous roots, collectively known as the root system. Plants that are pressed or propagated do not have a primary root. The junction between the trunk and the roots is called the root neck. Branches Citrus branches are composed of the main trunk, main branches, and lateral branches.

Fruit-shaped species, usually oblate to subglobose, rind very thin and smooth, or thick and rough, yellowish, vermilion or dark red, very easy or slightly easy to peel, orange complex very much or less, reticulate, easy to separate, usually tender, central column large and often empty, sparse full, scoops 7-14 petals, sparse more, scoops with thin or slightly thick walls, soft or quite tough, juice cells usually fusiform, short and inflated, sparse elongate Fruit pulp sour or sweet, or bitter, or with another peculiar odor; seeds more or less numerous, sparsely seedless, usually ovate, apically narrowly pointed, base rounded, cotyledons dark green, light green, or interspersed with nearly milky white, chalazal point purple, polyembryonic, rarely monoembryonic. Flowering April-May, fruiting October-December.

Main species of citrus trees

Rutabaga

Rutabaga is also known as the brand new step? The name is also used to describe a variety of citrus trees, including the Rutabagas. It is also known as the "Sneaker" or "Sneaker", which is the name given to a variety of citrus trees. Sneakers? Can I get a name? Can I get a She? 50 grams, orange-yellow to orange-red skin, glossy, crisp and juicy flesh, less slag, less seeds, aroma, sweet flavor.

Teak

Shatian Pomelo

Originally from Shatian, Rongxian, Guangxi, Guangdong, Guangxi, Sichuan cultivated more. Fruit skin is yellow, flesh is crisp, sweetness is high, resistance to storage and transportation.

Pingshan Pomelo is produced in Zhangzhou, Fujian. The fruit skin is yellow, the flesh is juicy and sweet, and the quality is excellent.

Kumquat

Ningbo Kumquat Also known as kumquat, kumquat, golden bullet. Native to Ningbo, Zhejiang Province, China, Hunan, Jiangxi, Guangxi cultivated more. The fruit is small and the skin is thick and difficult to peel. Eat the whole fruit with the skin and meat together with the entrance, the skin spicy and clear mouth, flesh slightly sour and sweet, the whole fruit is full of nectar, sweet, sour, bitter, spicy, hemp, so also known as the "five flavors of fruit". Not resistant to storage, more made of preserved fruit or drinks.

Sweet orange class

Xinhui sweet orange, mainly produced in Guangdong Xinhui, Guangzhou, Xingning, Minnan, Guinan also cultivated. Xinhui sweet orange peel orange-yellow, thin and smooth, with a circle at the bottom. The flesh is light yellow, with less juice, but the flavor is extremely sweet, no acidity, and very few seeds.

Jin orange Mainly produced in Jiangjin, Sichuan, Hubei, Hunan, Guizhou and other provinces have also been introduced to promote. It is characterized by orange-yellow fruit, soft and juicy flesh, moderately sweet and sour, fragrant, resistant to storage, stored until April to May of the following year, the quality is still good.

Wide-skinned citrus

Huangyan mandarin orange

Huangyan mandarin orange Originally from Huangyan, Zhejiang Province. Huangyan is one of the world's oldest citrus producers, known as the origin of the world citrus. It is also the earliest and most exported fresh oranges in China. The "Local Early" is the "trump card" among Huangyan mandarin oranges. The species matured in mid-November, with orange-yellow color and light, fine oil bubbles, single-fruit weight of 50 to 80 grams, skin slightly thick and easy to peel. Flesh orange-red, thin flesh without dregs, juicy flavor, moderately sweet and sour, not easy to break.

Banana Citrus

Banana Citrus is native to Guangdong, Guangdong, Guangxi, Fujian, Sichuan, Taiwan and other places are cultivated. The peel is orange-yellow to deep orange-yellow, the flesh is bright red, soft and juicy, with a sweet flavor and a long freshness period

Nutrition in Citrus

Citrus fruits contain more than 30 kinds of human health care substances that have been isolated, which are mainly: flavonoids, monoterpenes, coumarins, carotenoids, propanols, acridinones and glycerol glycolipids, and so on.

Flavonoids citrus fruits containing flavonoids have three types: Type I is rutin as the representative of the general flavonoids; Type II is orange peel glycosides, naringenin and other citrus fruits such as the unique flavanone; Type Ⅲ is the other fruits and vegetables have not yet been found so far, and only citrus has citrus flavonoids, such as citrus flavonoids containing polymethoxylated special flavonoid substances.

Carotenoids are known to contain carotenoids in many vegetables and fruits, which are important components for human health. The physiological function of carotenoids and its mechanism of research, China has also been the use of such substances developed into a number of health food and industrialized production. Coumarin contained in citrus is fully recognized by scientists as an anti-cancer substance. Research results show that the anti-cancer function of coumarin is formed through two main ways: one is coumarin detoxification of cancerous substances through the action of detoxification enzymes; the second is antagonistic inhibition of its metabolic activation with cancerous substances. These two effects are mainly in the cancer . Inhibitory effect is produced at the initiation stage.

Monoterpenes, triterpenes citrus contains a large number of terpenes represented by (R)-limonene. Terpenes are the substances that make up the unique aroma of citrus and have the effect of calming the human central nervous system, and studies have also confirmed its stress-reducing effect and its ability to eliminate fatigue.　Lemon PicrinLemon Picrin is the bitter component of citrus juice drinks, and is found in citrus fruits at about 100-200 ppm. however, studies have found that Lemon Picrin also has tumor inhibiting properties.

The other chemical components here are three compounds contained in citrus: phenylpropanoid, acridone and glycerol lipids.　Oranges can be said to be the whole body is a treasure, its pulp, skin, core and complex can be used in medicine. Tangerine rind after drying is called "Chenpi" (because of the efficacy of the medicine to Chen, so the name Chenpi). The white net-like filaments above the orange flesh, called "orange complex", contain a certain amount of vitamin P, which has the effect of clearing the channels, resolving phlegm, regulating qi, and eliminating stagnation, etc. The orange kernel is bitter in taste and has no bitter taste. Tangerine kernel is bitter and non-toxic in nature, and can be used to treat hernia and lumbago by regulating qi and relieving pain. Even the orange root and leaves can be used as medicine, with different functions such as soothing the liver, strengthening the spleen and harmonizing the stomach.