Flowering - development of plant, Biology

Assignment Help:

Flowering - Development of plant

One of the major changes that occur during the life cycle of a plant is the transition from vegetative stage to the flowering stage. In this transition the vegetative meristems change into flowering meristems which form sepals, petals, carpels and anthers instead of branches and leaves. It is a major morphogenetic change. In some plants this change occurs once in life-time and after flowering, fruit and seed set, the plant dies. Whereas, in others the flowers are produced every year, as in trees. Now the question arises, is it due to an internal annual rhythm in the plants or a requirement for particular environmental condition? In this section we will tell you what controls flowering and how this transition occurs.

One of the major factors that affects flowering, as we know today is related to the effects of the environment and in particular to the duration of light/dark 24 hour cycle or temperature. However, it took a number of years for scientists to realise this fact. We will describe two experimental observations which suggested that the length of the day determines the behaviour of plants with respect to flowering. The seeds of soya bean (Glycine max) were planted at different times in the month of May, June, July and August. Even though planted at different times, all of them flowered in the month of September. The first planted seeds took 125 days to flower whereas the last set flowered in only 58 days. These observations show that at a particular time of the year the day length was suitable for plants to flower. The second observation was made on a mutant of tobacco called Maryland mammoth, because of the large size of its leaves. In fields it does not flower in winter, however, in glass houses when light duration was provided like that of summer, it was possible to induce flowering even in winter in these plants.


Related Discussions:- Flowering - development of plant

Stage of total biological inactivity, Q. Is the stage when an insect larva ...

Q. Is the stage when an insect larva is within a cocoon a stage of total biological inactivity? The period when the larva is inside its cocoon is a time of intense biological a

Explain dextran, Dextran Dextran is a high molecular  weight polysaccha...

Dextran Dextran is a high molecular  weight polysaccharide having  α1→ 6,  α1→ 3 linked glucans. It is produced by the bacterial fermentation of sucrose by  Leuconostoc dextran

Are the arterial pulsations normal, Are the arterial pulsations normal? ...

Are the arterial pulsations normal? Is the pulse volume normal or increased? Is there a discrepancy of pulsation in any of the four extremities? A careful evaluation of pulsati

What is the condition for mendels second law to be valid, What is the condi...

What is the condition for Mendel's second law to be valid? Mendel's second law is only valid for genes located in dissimilar chromosomes. For genes situated in the same chromos

Explain the air sampling, Explain the Air Sampling? Microorganisms may ...

Explain the Air Sampling? Microorganisms may be present in air of processing facility and have an impact on the quality and safety of foods processed and handled there. To avoi

What are the dietary goals for diabetes, Q. What are the dietary goals for ...

Q. What are the dietary goals for diabetes? Well here they are. These are to: 1. Supply optimum nutrition to maintain good health, 2. Provide calories for maintaining ide

Explain about the dietary fibre, Explain about the Dietary Fibre? You a...

Explain about the Dietary Fibre? You are all aware that fibre is an important component in the structure of plants. However, fibre as a dietaiy constituent was considered impor

Explain nutritional support management for radiation therapy, Explain Nutri...

Explain Nutritional Support Management for radiation therapy? For managing these patients on radiation therapy, the following measures can be under taken: 1. Administration

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd