How varigation in Mirabilis jalapa is explained by plastid inheritance?
Answers
In 1908 Carl correns studied the plant Mirabilis jalapa which possessed three types of leaves
1. White colored leaf
2. Green colored leaf
3. Varigated leaf
This variation is due to the type of plastid present in the cytoplasm. The plastid is inherited vida cytoplasm because only the mothers phenotype is expressed in the next generation. I. e. if the mother plant (ovule) is a green plant, then the progeny would all be green leaf bearing irrespective of the father plant (pollen). Ovule has cytoplasm which contains plastid and pollen lack them.
He conducted experiments and suggested that pollen contributes less or no cytoplasm to the embryo. hence the plastid is inherited only from the maternal parent. This is called 'Uniparental/ maternal inheritance'
Answer:
Mirabilis jalapa, the marvel of Peru[1] or four o'clock flower, is the most commonly grown ornamental species of Mirabilis plant, and is available in a range of colours. Mirabilis in Latin means wonderful and Jalapa (or Xalapa) is the state capital of Veracruz in México. Mirabilis jalapa was cultivated by the Aztecs for medicinal and ornamental purposes.
The flowers usually open from late afternoon or at dusk (namely between 4 and 8 o'clock), giving rise to one of its common names. Flowers then produce a strong, sweet-smelling fragrance throughout the night, then close for good in the morning. New flowers open the following day. It arrived in Europe in 1525. Today, it is common in many tropical regions and is also valued in Europe as a (not hardy) ornamental plant. It is the children's state flower of Connecticut under the name of Michaela Petit's Four O'Clocks.
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