What causes the core in the middle of a banana to turn black?

Normal banana hearts and meat are the same color, if it is black, it means that the banana may have been spoiled, it is recommended not to eat it again, it will hurt the stomach.

Target. The black stuff inside the banana is the degraded seed of the banana. Human cultivation of bananas uses asexual reproduction, wild banana seeds are large and not tasty, so human beings choose those bananas whose seeds are degraded for cultivation, and in this way, the seeds of domesticated bananas have degenerated into small black spots, and they can no longer play a role in reproduction.

If you peel off the banana peel and find that the middle of the flesh of the banana has turned black, then it is best not to continue to eat, the flesh of the banana has turned black, most of the reasons are because the storage time is too long, and the storage method is not correct. As a result, the flesh begins to deteriorate, mildew or bacterial infection, and if you don't pay attention to eating the blackened banana pulp, it can easily cause acute gastroenteritis. Don't eat bananas that have gone bad just because you think it would be too wasteful to throw them away.

Of course, if there is only a very small black line in the center of the banana, this does not affect the normal consumption, this is a very normal phenomenon, because the bananas that we see now are cultivated little by little, and the black line in the middle is the degraded seed, because at the beginning, the banana seeds were very large, and they became the bananas that we see now after generations of cultivation, so the black line in the middle does not affect the normal eating.

The black core in the middle of the banana is the banana seed, which is the banana seed that degenerates into small particles. Don't eat bananas when they turn black, because polyphenol oxidase combines with substances in bananas to form quinones, which are derivatives of benzene and are toxic, so they can't be eaten. The black flesh is moldy, and the bananas bought back can not be left for too long, they are easy to deteriorate, and it is best to eat them in time.

The appearance of bananas is very good, and the core is black and cannot be eaten. If the flesh of the banana is black when the peel is peeled, it means that the inside of the banana has rotted and deteriorated, and it cannot be eaten; If it is peeled, the color of the meat is normal, but there is a thin black line in the center, which is a row of small black dots formed by banana seeds, which can be eaten with confidence.

Bananas are generally stored for 2-3 days, and we usually put the fruits we buy in the refrigerator, but the storage time of bananas is not much longer. Bananas will turn black after spoiling, and at this time, the skin will turn black and the inside will not be black, and there may be a situation where the skin is not black and the inside is black.

Precautions for buying bananas

When buying bananas, you should first observe the color of the skin of the banana, and do not buy bananas that are too green or too yellow. If the banana is not in a hurry to eat at home, then a small amount of green can be allowed.

Normal bananas have dark spots of varying sizes and no edges and corners on the outside. On the other hand, there is a banana in the market, which has a perfect appearance.

With not even a hint of dark spots and sharp edges, such bananas are likely ripe.

First of all, the melanistic banana cells are more damaged, and they are susceptible to microbial invasion and microbial corruption. Secondly, the blackened bananas seriously affect the appearance and appetite, and the storage is greatly reduced, such bananas can only be stored for a few days at most; In addition, polyphenols are an important class of antioxidants for the human body, and the black line is the seed of the banana, which disappears when it is ripe, and the black line indicates that it is not ripe or the banana is ripe. According to the Science Popularization Association of Agricultural Science and Technology, the world's first banana not only had seeds, but also many and large, but had very little flesh (wild banana seeds are large and hard, and it is very inconvenient for people to eat it).

So the banana peel turns black, can the banana still be eaten? In fact, as long as there are few black spots on the banana peel, it is edible, and many people will deliberately avoid bananas with a little black spot when buying bananas. Bananas are one of the most common fruits in our daily life, bananas are sweet, nutritious, and not high, so they are loved by everyone.

Many people will find that when they buy fresh bananas home, as long as they put them on for a few days, the banana peel will appear black spots and <>

The reason why bananas turn black is said to be because the cells of the banana epidermis have been damaged, and after the cell structure is destroyed, the phenols in the cells and oxidase meet, and with the participation of oxygen, the oxidase catalyzes the phenols in the cells to react with oxygen to produce quinones, making the banana black.

Because the cells of banana peels are rich in phenolic substances and contain polyphenol oxidase. Normally, these two things are separated in different areas of the cell, but when the skin of the banana is damaged, the cells are destroyed, and the two substances can meet. Coupled with the fact that the damaged cells are exposed to the air, the cells of banana peels are rich in phenols and polyphenol oxidase.

They are in different areas of the cell once the cell is damaged. When the two substances are combined, these polyphenol oxidases catalyze the reaction of the polyphenols in the skin with oxygen to produce quinones, and finally react to form catechol-type melanin.

There will always be a small black core in the banana core, which is left by the degeneration of the banana seeds, and is not a symptom of spoilage. However, if the whole banana core is blackened, it is because the polyphenol oxidase and the substance in the banana form a benzene derivative, and the banana should not continue to be eaten, which is easy to cause harm to the human body.

If the banana is left for too long, the phenolic compounds in it will react with oxygen under the catalysis of polyphenols to produce a component, and then the melanin produced will cause the banana to turn black, because there are many substances in the banana cells of this classification. Bananas are damaged on the outside, the cells are destroyed, and the polyphenols in normal cells produce melanin in response to changes in oxygen.

It is bad and not fresh, so it is recommended to throw it away and not eat it, because it is not healthy.

There are two possible reasons for the black inside of the banana core to look good: 1. The banana core turns black, which may be due to the damage to the banana content and skin, which causes the oxygen inside to contact the banana core, resulting in the banana core turning black. In this case, the taste of the banana core does not change, and it can be eaten continuously.

2. The blackening of the banana core may be caused by the decay and deterioration of the inside of the banana core. If you smell a bad smell or taste bad, it may be caused by rotting and deterioration of the banana core, in this case, the banana core should not be eaten. In addition, if the outer skin of the banana turns black, it does not mean that there is no problem with the inside of the banana.

The blackening of the outer skin may be due to the fact that the banana has been stored for too long, which leads to the growth of bacteria and the deterioration of the slag. In this case, the banana rind is also not suitable for consumption. To sum up, in view of the situation that the appearance of bananas is intact but the core is black, it is recommended to check the state of bananas before eating, and if there is a peculiar smell or poor taste, it should not be eaten.

In this case, you can eat it, so don't worry. Because this situation is not that the banana has gone bad, but that some banana alienated seeds have oxidized to form a black substance. This situation will not affect its nutrition, so there is no need to worry, but these black substances may affect the taste when eating, and will not cause adverse effects.

How to store bananas fresh:1.There are ripening agents on the surface of bananas, and the bananas that cannot be eaten are washed several times with water to control the moisture.

2.Then wrap the roots of the banana with plastic wrap, and the roots of the banana will release a substance, which can be extended after wrapping it in plastic wrap.

3.The first time a banana is rotten is to turn it over from the part that was pressed, or hang it with a rope or hook, which can reduce the extruded area and thus extend the shelf life.

If the banana turns black in the middle, it is spoiled and rotten, and it can no longer be eaten.

It can be eaten even if the skin is black.

Banana peel melanin is mostly polyphenols, which are converted into hydroxyquinones under the action of polyphenol oxidase, and then form a catechol-type melanin. Plant polyphenol polymers are important biological antioxidants, so banana peel melanin has lipid peroxidation. The determination of lipid antioxidant effect has become a universal method to elucidate the mechanism of action of anti-aging substances.

If it refers to a thin black line-like substance in the middle, it is actually the ovule of the banana, which is generally non-toxic and can be eaten with confidence; If you peel the banana and find that the core (i.e. the flesh) to be eaten is black, or don't eat it, this is mainly due to the blackening caused by local mildew or bacterial infection caused by too long storage, which is easy to cause physical discomfort after eating.

Banana blackening is a more common phenomenon in life, its interior and skin will turn black, if the banana skin turns black, because it is ripe, this is the result of the oxidation reaction of the skin in the air, at this time the banana is the sweetest, and the taste is better, however, the banana in this state can no longer be stored, it must be eaten in time, otherwise it will be broken; If the flesh of the banana is black when the peel is peeled, it means that the inside of the banana has rotted and deteriorated, and it cannot be eaten; If you peel off the banana peel, the color of the flesh is normal, but there is a thin black line in the center of the pulp, which is actually the ovule of the banana, which is a row of black dots formed after the degradation of the banana seed.

The banana is fine on the outside and the core is black on the inside, which may be caused by local mildew or bacterial infection caused by being stored for too long. This kind of banana is recommended not to be eaten, and it is easy to cause acute gastroenteritis after eating. But if only a tiny black heart can be eaten, this is normal.

The banana is fine on the outside and the core is black on the insideIf the core of the banana is black, it is best not to eat, the blackened part is mainly caused by local mildew or bacterial infection caused by too long storage, and it is easy to cause acute gastroenteritis after eating. But if only a tiny black heart can be eaten, this is normal. This is due to the fact that the improved bananas have no seeds, and the black core in the banana flesh is formed.

In fact, when it comes to preserving bananas, many of us do it wrong. Bananas are often refrigerated in the refrigerator, which will cause the flesh of the banana to turn dark brown, which will affect the taste. The correct way is to rinse the whole bunch of bananas with water several times to reduce the corrosion of the ripening agent, and then store them in a cool place.