Table of Contents
- 1 Why does the seed leaf become smaller?
- 2 How does the size and shape of a plant change as it grows from a seed?
- 3 What happens to the seed leaf after germination?
- 4 What affected the seed growth here explain?
- 5 Why do seeds vary in size and shape?
- 6 Why do the first leaves of plant seedlings differ from mature foliage leaves?
- 7 What happens to the leaves of a plant in a drought?
- 8 Why do some plants have more leaves than others?
Why does the seed leaf become smaller?
The answer is the Seed Leaf! The seed leaf stores food and provides the developing seedling food for respiration, so the seed can release energy for its own growth. The seed leaf will reduce in its mass over time, as the seedling grows bigger and taller.
What will happen to a seed leaf?
Once the plant is able to make its own food, it no longer needs to depend on the food stored in the seed leaves for its survival. What will happen to the seed leaves then? The seed leaves will wither and drop.
How does the size and shape of a plant change as it grows from a seed?
The size of a seed is known to affect the fitness of the plant growing from it; larger seeds often have the higher fitnesses. Many plant species produce seeds which vary in size due to their position in the inflorescence or fruit.
Why does the cotyledon become smaller during germination?
The cotyledon becomes smaller during germination because the nutrients that are stored in it are used to power growth and development. Cotyledons are leaf like structures that are part of a plant embryo.
What happens to the seed leaf after germination?
Once the true leaves develop, they start to resemble actual leaves on the mature plant—just tinier versions of them. After the first few sets of leaves sprout and the roots dig deeper into the soil, the seedling draws energy from photosynthesis above ground and nutrients found below ground.
What is the purpose of a seed leaf?
1 The seed leaves serve to access the stored nutrients in the seed, feeding it until the true leaves develop and begin photosynthesizing.
What affected the seed growth here explain?
Seed germination depends on both internal and external conditions. The most important external factors include right temperature, water, oxygen or air and sometimes light or darkness. Various plants require different variables for successful seed germination.
What causes a seed to grow?
All seeds need water, oxygen, and proper temperature in order to germinate. Some germinate better in full light while others require darkness to germinate. When a seed is exposed to the proper conditions, water and oxygen are taken in through the seed coat. The embryo’s cells start to enlarge.
Why do seeds vary in size and shape?
Why seeds are of different sizes and shapes has always been a relevant question in plant biology. The simplest answer to it is mother nature selects these traits for a species depending on their need during evolution and adaptation in newer areas.
What was the effect of the seed size on germination?
It has been observed that large seeds increase germination, seedling growth, and survival. As a consequence, large seeds can produce more vigorous and competitively superior seedlings.
Why do the first leaves of plant seedlings differ from mature foliage leaves?
In all species leaves on seedlings displayed a lower mass per unit area and lower nitrogen content than on mature trees. However, owing to their larger stomatal conductance, leaves on seedlings usually showed larger photosynthetic nitrogen-use efficiency and lower water-use efficiency than on mature trees.
What happens to the size of the leaves of a tree?
As the tree grows taller, the minimum leaf size goes up, while the maximum leaf size goes down. At around 100m, the two cross, so that the minimum required leaf size is greater than the maximum useful leaf size. And, guess what, the tallest known trees top out at around 100m.
What happens to the leaves of a plant in a drought?
Plants growing in drought conditions do DECREASE the area of their leaves (the leaves actually shrink). Therefore, to eliminate any stresses on the plants would encourage leaf growth.
Why does a bean plant shrink after it develops leaves?
A bean seed shrinks and disappears after the seedling develops leaves because the seed’s food reserves are used up. Since the leaves can now make energy for the plant, this lack of food reserves from the seed is not a danger.
Why do some plants have more leaves than others?
The number of leaves on a plant is fixed mainly by the genetics of the plant which controls the arrangement of leaves on the stem. Of course, a bigger plant has more leaves, but it is not a simple matter to switch growth into extra leaf mass. Plants growing in drought conditions do DECREASE the area of their leaves (the leaves actually shrink).