Few products eaten by so many
people on earth as the potato. Between 2011 and 2913, according to
the Food and Agriculture Organization (FAO) of the United Nations, 374 million
tonnes of potatoes were produced. Besides the potato we also know
the sweet potato: the sweet potato. The production of this tuber
was about 104 million tons in the same period.
Click on the thumbnails if you want to see the large photos.
A drawing of
the sweet potato
potato grows in the Educational or Butterfly greenhouse of the Hortus
Photo's : Fred Triep
sweet potato is not related to the ordinary potato.
The sweet potato is the underground part of a species from the Convolvulaceae
family, namely Ipomoea batatas.
The plants from the morning glory family
have scattered leaves along the stalk and regular five-part flowers: five
corolla leaves, five sepals and 5 or 10 stamens.
Known plants from this family in Western Europe are the
species from the genus Convolvulus, the field bindweed (C. arvensis), shore
bindweed (C. soldanella),
hedged bindweed (C. sepium) and great
bindweed (C. sylvatica).
It is a cosmopolitan family that counts about 1600 species.
Approximately 300 to 500 species are counted among the genus Ipomoea.
most plants in this family, they are climbers.
The striking saucer-shaped flowers of the plants from this genus are usually
open for one day, which is why they are also called dayflower.
Many species from this genus are also cultivated as ornamental plants, such as
the purple morning glory (Ipomoea purpurea).
On many tropical beaches you will find the goat's
foot (Ipomoea pres-caprea), a creeping plant
with leaves that resemble a goat's hoof.
This plant spreads over the seas because the seeds stay afloat.
He can carrot on every stem knot, so he can record the sand well.
Click on the
thumbnails if you want to see the large photos.
purple spruce (Ipomoea purpurea)
(Ipomoea pres-caprae) on the beach of Mananjary (Madagascar)
Leaves as a vegetable
The sweet potato (Ipomoea.batatas) originates from South
By the Spaniards and later the Portuguese brought this food to Southeast
Asia, where it became an important food crop.
In Polynesia and New Guinea they already knew the sweet potato.
He may already have been introduced there before on the Pacific.
In the Netherlands, sweet potato, which naturally thrives only in
tropical and subtropical regions, has not eaten much, although it is
becoming increasingly popular.
In the Surinamese kitchen the sweet potato is an important product.
The largest producer of sweet potatoes is China, where about seventy percent
of all sweet potatoes are grown in the world.
The sweet potato has heart-shaped leaves on its long stems, which are
sound or lobed.
The shape of
leaves can vary greatly.
The leaves can be eaten as leafy vegetables and contain a lot of vitamin C.
The large bell-shaped flowers appear in the leaf axils, which have a
gradient from white to purple.
The sweet potato forms tubers at its roots, in which reserve food is
stored from which the plant can grow up again later.
This food source is almost exclusively vegetatively propagated by
The tubers are variable, the skin can be white, yellow-orange, brown or
are also differences in sweetness.
harvesting, the sweet potato has a limited shelf life.
That is why self-sufficient farmers harvest only a small part of their tubers.
Better for diabetics?
All species of
Ipomoea have no starch as a reserve food, but inulin.
Inulin is a polysaccharide made up of fructose units.
This is in contrast to starch, which consists of several glucose
Inulin can not be broken down by the enzymes in the mouth and the small
The breakdown of inulin starts only in the large intestine, where some
bacteria secrete enzymes that can break down the large molecules into
The digestion products of the sweet potato are therefore absorbed later
than those of the ordinary potato.
According to some, that would be better for diabetics.
The use of sweet potatoes stimulates the growth of bacteria that convert
the inulin and thereby changes the intestinal flora.
The sweet potato also contains small amounts of sugar raffinose, which
can not be broken down in the mouth or small intestine.
Like inulin, it is broken down by bacteria in the large intestine.
The degradation products of the bacteria involved in the conversions of
inulin and raffinose include hydrogen and carbon dioxide.
This gas production can lead to flatulence (flatulence) in some people.
The shapes of the sweet potato with yellow or orange meat also contain a lot
of vitamin A.
You can find many dishes with sweet potatoes on the
Dutch Albert Heyn supermarket website
The sweet potato can be used in both sweet and savory dishes.
In the Hortus Botanicus of Amsterdam you will
find the sweet potato in the butterfly greenhouse.
Planten voor dagelijks gebruik- Botanische achtergronden en
Zoet aardappel- Wikipedia
Petsakos, A, Hareau, G, Pradel,
W, and Suarez, V>
Forecasting Potato and Sweetpotato Yields for 2050
International Potato Center, 2016
Zoete aardappel- multi culi aarddappel
Gevulde zoete aardappel met quinoa van Fooddeco
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newly created on
Wednesday, January 24th, 2018.