Seedless citrus in the market produces seedless fruits by looking for mutant individuals whose seeds are sterile but can produce plant hormones themselves. Some citrus branches mutate during germination due to external stimuli, which makes the seeds unable to develop, but the fruit itself develops normally. Seedless citrus can be produced by cutting and grafting these branches.
Extended data
Medium-sized oranges are the best, the skin is too thick and the sweetness is poor, and the small ones may not grow well enough and taste bad. The skin color of most oranges changes from green to yellow and finally to orange or orange-red, so the redder the color, the better the maturity and the sweeter the taste. However, it should be noted that oranges are picked before they are ripe, and the peel is turquoise, but the taste is not sour, and the red ones will be sweeter. Besides, look at the leaves on the orange stalks. The fresher the leaves, the better the oranges.
Vitamin A in oranges can also enhance people's vision in dark environment and treat night blindness. Oranges should not be eaten more. If you eat too much, you will get carotene, and your skin will be dark yellow, just like jaundice. If you eat too many oranges and your palms turn yellow, as long as you stop eating for a while, your skin color will gradually return to normal. In the Ming Dynasty, Zhang's uncle Zhang had a soft spot for oranges. The report said that he "likes oranges, oranges are ripe, and there is nothing but oranges. If you don't publish it yourself, you will lose your life and strip it. " When you eat them, your hands and feet are yellow.
Baidu Encyclopedia-Orange (Rutaceae Citrus)