mimosa
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Mimosa ( Mimosa pudica ) |
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The Mimosa ( Mimosa pudica ), even the modesty of sensitive plant called, is a tropical plant species in the subfamily of Mimosa Family (Mimosoideae) within the family of legumes (Fabaceae). Often cultivated as ornamental trees ( Acacia ) such. B. Acacia dealbata called "mimosa".
description
The mimosa is an annual to perennial, herbaceous, subshrub close to the ground and grows up to about 1 meter high, the branched trunk is bare to bristly with isolated spines, the plant becomes lignified at the bottom with increasing age. The long-stalked leaves are bipinnate with one or two pairs of first-order leaflets and 10 to 26 pairs of pointed to rounded, sessile, elongated and leathery, slightly bristly, ciliate leaflets of the second order. There are 7 to 8 mm long, bristly stipules .
The mimosa performs nastias , i.e. movements predetermined by the structure of the plant organs . The plant reacts to vibrations, rapid cooling or rapid warming, and also to changes in light intensity. Only the affected region of the plant is folded in leaf by leaf. After a few minutes, the branches and leaves will stretch out again. This is where the English name “Touch-me-not” or “Touch me not” and the term “mimosy” or “mimosa-like” come from. These movements are due to turgor changes. The turgor of the cells in the pulvini decreases. The pulvini are motor tissues on the leaf joints. Your cells lose potassium ions , and water osmotically leaves the cells . Therefore the leaf joints slacken. Most turgor movements differ from the typical growth movements in their reversibility . Turgor movements are only reversible, however, if the osmotic pressure in the cells of the movement tissue can decrease or increase again after a certain time. Such changes can be found in some petiole joints, which cause leaves to rise and fall every day. The branches of the mimosa have protective spines. At night the leaves also contract (into the "sleeping position") and do not react as strongly as during the day.
Axial, many-flowered and head-shaped inflorescences are formed on long, densely hairy stems with a diameter of 8 to 10 mm. The small, mostly four-fold flowers with a minimal calyx and a bract have light yellow to reddish and bell-shaped petals with fine hairs on the outside . The long and protruding filamentous stamens are pink to reddish and make up the main part of the effect of the inflorescence. The ovary is stalked short and smooth, the stylus is ply with capitate stigma . Flowering time is from July to October. It forms prickly and bristly, flat, articulated, 12 to 20 mm long and up to 5 mm wide, special legumes (frame pods) with two to five links that detach from the remaining frame (replum) when ripe. Propagation takes place through the round to angular and flattened, hard, brownish, 3 to 4 mm large seeds.
All parts of the mimosa are variously described as harmful and incompatible, but it is not listed as a poisonous plant. It should not be consumed and, as a houseplant, should not be accessible to children or pets.
Mimosa ( Mimosa pudica ), illustration
Reaction of a mimosa to a mechanical stimulus
A mimosa before and after a stronger mechanical irritation
Bristly, young frame sleeves
Frame pods and stuck empty frames and seeds
Occurrence
The Mimosa pudica is native to South America . It grows both in forests and in tropical and subtropical gardens and spreads rapidly. For example in southern European countries. It is an invasive plant .
sowing
The seeds of the mimosa are available in Germany in hardware stores and online. The mimosa is not a light germ ; thus the lenticular seeds can be sown 0.5-1 cm deep into the earth. In this way, the seeds are kept moist throughout the soil, which also promotes germination .
Since the water supply is very important when sowing, it is recommended that the seeds be dressed before they are placed in the soil. For this purpose, the seeds should be placed in cooked chamomile tea for up to 4 hours. The temperature should be between 30 and 50 degrees and not exceed this in order not to damage the seeds. The pickling has an antibacterial effect due to the temperature and the chamomile. At the same time, the seeds can already take up a reserve of water which they can fall back on during the growth phase.
Metaphorical meaning
The term mimosa is used metaphorically for a very sensitive and overly sensitive (or recovering from an illness) person.
Web links
- Mimosa pudica inthe IUCN 2013 Red List of Threatened Species . Posted by: Groom, A., 2010. Retrieved May 7, 2014 ..
- Mimosa pudica on kuebelpflanzeinfo.de.
- Description of the species in the Flora of Pakistan (English).
- Mimosa pudica in the Flora of China, Vol. 10.
Individual evidence
- ↑ Nastie in Mimosa at Plants In Motion.
- ^ Turgorine in the Lexicon of Biochemistry.
- ↑ Mimosa on hausgarten.net.
- ↑ rearing of Mimosa pudica ( Memento of 3 December 2017 Internet Archive ).
- ↑ Healthy seeds (PDF; 6.3 MB), on dottenfelderhof.de, accessed on April 3, 2015.
- ↑ Evangelische Sonntags-Zeitung : Highly sensitive people have a hard time »Don't get in line!« ( Memento of the original from January 23, 2018 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , from December 13, 2017, loaded on January 22, 2018.
