The reason why blue fruits are rare is because plants need a lot of chlorophyll to help them photosynthesize, and blue is not conducive to their better survival. Therefore, through natural selection, most of the blue fruits Colorful plants are all extinct.

The leaves of plants are generally green, and green is a contrasting color to red. On the color wheel, red and green can be seen opposite each other, making it easier for birds and other animals to spot the fruit. Animals that eat fruit more importantly spread the plant's seeds, which aids in reproduction. Therefore, plants with the highest contrast are most likely to survive. ?

In addition, some plants may produce darker or lighter leaves, and the color of the fruit will be adjusted to the color of the leaves to maximize contrast. For example, plants with very dark leaves usually produce more brightly colored fruits, usually yellow, such as lemons, loquats, etc.

Rare blue fruit

1. Blue Oregon grape. Although grapes are common fruits, Oregon grapes are not necessarily available even if you have money. There is no domestic origin of this fruit, the main production area is in Colombia, and the yield is very low, so few people have eaten it. ?

2. Indigo fruit. Indigo fruit, also known as blue fruit honeysuckle and blue indigo fruit honeysuckle, is produced in the northeastern region of my country. The indigo fruit has juicy fruits with extremely small seeds and high juice yield. It is an excellent raw material for making beverages. The indigo fruit is rare and natural in the world. Green wild edible berries, known as the "King of Fruits", contain 17 kinds of amino acids, accounting for 40% of the total essential amino acids for the human body.