Cavendish banana

The Cavendish is a kind of banana. Most bananas in stores are this kind. They grow on big plants.

When they are picked, they are green. Then they turn yellow. This makes them sweet to eat.

These plants are all the same. They do not have seeds. They grow from copies of other plants.

Because they are all the same, they can get sick. A sickness called Panama disease can hurt them.

Scientists are working to help these plants. They want to keep our bananas safe to eat.

The Cavendish is a type of banana. Most bananas in stores are this kind. These bananas grow on plants. Some plants are small, like the Dwarf Cavendish. Others are called Grand Nain. This is the type used for Chiquita bananas.

When you buy them, the skin is often green. As the fruit ripens, the skin turns yellow. This happens because starch turns into sugar. This makes the fruit taste sweet.

Some bananas turn brown or black as they get very ripe.

These plants are special because they have no seeds. They make new plants by cloning. Cloning means making an exact copy of a plant.

Because they are all copies, they are not very different from each other. This is a problem for the plants.

Many Cavendish plants grow close together in large groups. This makes them easy for sickness to spread. A fungus called Panama disease can hurt them. This disease was a big problem for other bananas long ago. Now, the disease is attacking Cavendish plants too. Scientists are trying to find new ways to save them.

The Cavendish banana is a very important fruit. Most bananas you see in stores are this kind. These bananas grow on plants called cultivars. Some are called 'Dwarf Cavendish' and others are 'Grand Nain.' The 'Grand Nain' is often sold as the Chiquita banana. These plants are part of a group called Musa acuminata. They are the most traded bananas in the whole world.

Watching a banana ripen is a neat thing that happens. When you first pick them, the skin is partly green. As the fruit ripens, the starch turns into sugar. This change makes the fruit taste very sweet. The skin turns yellow during this process.

If they ripen more, brown sugar spots appear on the skin. If they get too ripe, the skin turns black and the fruit becomes mushy. You can help them ripen by using ethylene gas.

These bananas have a long history in Europe. They were named after William Cavendish, the 6th Duke of Devonshire. In 1834, he received a shipment of bananas from Mauritius. A gardener named Sir Joseph Paxton grew them in greenhouses. He called the plants Musa cavendishii to honor the Duke. Paxton even won a medal for his work in 1835.

In the 1950s, the Cavendish became very popular. A different banana called the Gros Michel was lost to Panama disease. The Cavendish was able to grow in the same soil. However, a new version of the disease called Tropical Race 4 is now a problem. It was found in Malaysia and Sumatra in 2008. Later, it was found in the Caribbean in 2019.

Cavendish bananas are unique because they cannot make seeds. Instead, they are grown through cloning. This means every plant is an exact copy of the others. Because they are all the same, they have very low genetic diversity. This makes it hard for them to fight off new sicknesses. Scientists like James Dale are working to help. In 2017, he made a banana that can resist this disease.

The Cavendish banana is a specific group of banana cultivars. These are varieties of the plant species Musa acuminata. They belong to the AAA triploid cultivar group. Cavendish bananas are incredibly important for the global food system. They make up the vast majority of bananas traded internationally. Between 1998 and 2000, they accounted for 47% of all global banana production. Most people recognize them from the fruit sold in grocery stores. They are used in many ways, such as being eaten raw or used in baking.

Watching a Cavendish banana ripen is a fascinating biological process. When the fruit is first harvested, the outer skin is partially green. As the fruit matures, the starch inside is converted into sugars. This chemical change is what makes the fruit taste sweet. During this time, the skin turns from green to yellow.

You can also induce this process using ethylene gas. This is a gas that bananas naturally emit as they ripen. As they turn yellow, they release sweet-scented esters. Eventually, the fruit reaches stage 7, where brown or black sugar spots appear. If the fruit becomes overripe, the skin turns black and the flesh becomes mushy.

There are several different types, or cultivars, within the Cavendish subgroup. These are often distinguished by the height of the plant or the features of the fruit. One major clone is the 'Grand Nain,' which is also known as the Chiquita banana. This is the most important clone for international trade. Another widely grown clone is the 'Dwarf Cavendish,' which was identified in 1888. Other recognized cultivars include 'Lacatan,' 'Poyo,' 'Valéry,' and 'Williams.'

Different scientific systems may group these cultivars in different ways. Some classifications include 'Extra Dwarf Cavendish' or 'Giant Cavendish.'

The history of the Cavendish banana is tied to 19th-century Europe. The bananas were named after William Cavendish, the 6th Duke of Devonshire. In 1834, the Duke received a shipment of bananas from Mauritius. His head gardener, Sir Joseph Paxton, grew them in the greenhouses of Chatsworth House. Paxton described the plants botanically as Musa cavendishii. He even won a medal at the 1835 Royal Horticultural Society show for this work.

By the 1850s, these plants were being shipped to various places in the Pacific. Some may have reached the Canary Islands, where bananas were also grown. In 1888, Thomas Fyffe imported bananas from the Canary Islands into England. These are now known to be the Dwarf Cavendish cultivar.

For a long time, the Cavendish was not the most famous banana. In the early 20th century, the Gros Michel variety was the dominant commercial banana. However, the Gros Michel was devastated by a fungal disease called Panama disease. This happened in the 1950s and changed the banana industry forever. The Cavendish became the new standard because it could grow in the same soils as the Gros Michel. Many people believed the Cavendish was resistant to Panama disease.

However, recent history shows that this resistance might not last.

The greatest threat to the Cavendish is its lack of genetic diversity. These plants are parthenocarpic, meaning they have no seeds. Because they cannot reproduce sexually, they are grown through cloning. This means every plant is an identical copy of the others. Because they are planted in dense monocultures, they have no natural buffer against sickness. This makes them extremely vulnerable to fungal outbreaks and genetic mutations. In 2008, reports showed that Panama disease was attacking Cavendish plants in Sumatra and Malaysia. In 2019, a specific version called Tropical Race 4 (TR4) was found in the Caribbean.

Scientists are now working hard to prevent the commercial extinction of the Cavendish. Because they rely on cloning, they evolve much more slowly than crops grown from seeds. This makes it difficult for them to develop natural resistance to diseases like Fusarium wilt. In 2017, a biotechnologist named James Dale created a transgenic banana. This was a genetically engineered version designed to resist Tropical Race 4. In 2023, agencies in the Philippines used pest control to fight Fusarium oxysporum f.sp. cubense. Protecting these plants is vital since they represent about 99% of banana exports to developed countries.