Pomelo is a kind of fruit, similar to grapefruit, with yellow fruit and good taste, that is, "Zhuluan", also known as "Pomelo", with light yellow skin and similar pulp color to Shatian Pomelo, which is sweet and sour. When ripe, the skin is yellow and the flesh is red and white. Grapefruit should be the same weight, and the fruiting body should be shiny, thin and soft. Grapefruit is rich in vitamin C, and it is a fruit with less sugar, so it is indispensable on the menu of dieters.

Grapefruit (scientific name: citrus maxima), also known as Wendan, Xiangluan, Zhuluan, Neizi and so on. It is a mature fruit of Rutaceae pomelo, which is produced in China, Fujian, Jiangxi, Hunan, Guangdong, Guangxi, Zhejiang, Sichuan and other southern regions. Grapefruit is sweet and sour, cool and moist, rich in nutrition and high in medicinal value. It is one of the fruits that people like to eat, and it is also recognized by the medical community as the most therapeutic fruit. Citron tea and grapefruit peel also have practical value and can be used as medicine.

Morphological characteristics:

Grapefruit, namely grapefruit, is very similar to grapefruit native to China in plant taxonomy. Both of them belong to the genus Citrus, except that the shoots, leaves, pedicels, sepals and ovaries of pomelo are hairy, the seeds are single embryo, the distance between fruits is obvious, and they are not beaded. Grape fruit is hairless in all parts of the whole plant, with many embryo seeds, thinner skin than grapefruit, and many fruits are often strung like grapes, so its English name is grapefruit. According to phytochemical analysis, many chemical components of grapefruit belong to the original grapefruit. The chemical composition of its flower and peel is almost the same as that of grapefruit, and the flower owner contains methyl o-aminobenzoate, nerol and decanol. The pericarp mainly contains limonene (about 90%), the rest are citral, citronellol and octanol, and also contains flavonoids naringin. Compared with the cell chromosome number, the chromosome number of grapefruit is X=9, 2n= 18, 27, 36, which means there are diploid, triploid and tetraploid varieties. The chromosome number of pomelo is X=9, 2n =18,36, which means that there are only diploid and tetraploid varieties. The comparison of these characters clearly shows that American grapefruit is undoubtedly a variety (such as bud mutation) or hybrid of China grapefruit (Burm)Merr, which shows how close the genetic relationship between the two citrus plants is.

Pomelo evergreen trees, grapefruit leaves like oranges, oranges are mostly rectangular or oval, wings and leaves are heart-shaped; Fruits are mostly gourd-shaped, pear-shaped or spherical, with yellow-orange surface, concave luster and generally pungent smell. The peel is thin and can be peeled off by hand. The fruit is more mature than citrus pomelo, with a single fruit weight above 1 kg and a diameter of 15-25 cm. There is a white sponge layer between the peel and the pulp. The pulp is red or yellowish white, and white is more common. Juice is rich in flavor, rich in fragrance, sweet or sour, and sometimes bitter, mainly from the biological glycosides it contains. Grapefruit can be preserved in the natural environment for several months without deterioration. The petals of pulp are 12- 15 petals. Artificial cultivation is often bagged to make it seedless, and natural single fruit seeds can reach more than 100. Common grapefruit 65438+ 10 to 165438+ 10 will mature, and early-maturing varieties can be listed in September, and late-maturing varieties can be as late as 1- February of the following year. The root system is shallow, mostly concentrated in 1 to 3 meters.