Estimate the maximum turgor pressures (Ψp) inside the cells of leaves and flowers. 2. Which structure (leaves or flowers) have stiffer, more rigid cell walls? What part(s) of the graphs tell you this? 3. At about what relative cell volume (equal to relative water content) does incipient plasmolysis occur for each structure? 4. Which structure (leaves or flowers) has more solutes inside the cells? 5. Which structure (leaves or flowers) do you expect to undergo more shrinking and swelling in volume with changes in water content? 6. Imagine you wanted to display a C. speciosa shoot in a vase in your house. You cut a flowering shoot (a shoot with both leaves and flowers on it) from a tree growing outside. You then transport the shoot into your house. As you carry it, the leaves and flowers are evaporating water. By the time you place the shoot in the vase of water, the relative water content (equivalent to relative cell volume) of the leaves and flowers has declined to 0.95, i.e. 95% of its fully hydrated maximum. Assuming both leaves and flowers have equal access to water, which structure will rehydrate faster? Why? What information tells you this?
Plant Structure and Growth
Roots anchor, the plant, ingest minerals and water, direct water and supplements, and store food. These are two kinds of root frameworks.
Plant Life Cycle
Plants are part of the PLANT KINGDOM, which is one of the five kingdoms of life. Plants are divided into smaller classes based on common characteristics. Certain characteristics are shared by all plants. They are made up of a large number of cells. They also make their own food through a chemical process called photosynthesis, which involves the use of water, carbon dioxide, and solar energy. They pump life-giving oxygen into the air as a by-product.
Life Cycle of Plants
All the organisms that belong to the Kingdom Plantae are known as plants. They are multicellular and eukaryotic and can synthesize their food by photosynthesis, known as autotrophic organisms. They are classified based on certain characteristics, such as the plants bear flowers; some have only naked seeds and do not contain flowers. Some plants neither have seeds nor flowers, such as ferns and mosses.
Plant Morphology and Anatomy
The study of life and organisms is biology. The cell is recognized as the basic unit of life by biology. From ancient Greek, biology is recognized. Modern biology deals with the recent developments in Science.
1.
Water potential is a measure of the potential energy in water, or the difference in potential energy between a given water sample and pure water (at atmospheric pressure and ambient temperature). Water potential is denoted by the Greek letter ψ (psi) and is expressed in units of pressure (pressure is a form of energy) called megapascals (MPa). The potential of pure water (Ψwpure H2O) is designated a value of zero
The water potential in plant solutions is influenced by solute concentration, pressure, gravity, and factors called matrix effects. Water potential can be broken down into its individual components using the following equation:
Ψsystem = Ψtotal = Ψs + Ψp + Ψg + Ψm
where
Ψs = solute potential
Ψp, = pressure potential
Ψg, = gravity potential
Ψm = matric potential
Turgor pressure plays a significant role in the promotion of plant growth. One significant function of the turgor pressure is to promote cell volume expansion and the higher the turgor pressure is, the larger the leaf expansion will be
Turgor pressure in plants plays a key role in processes such as growth, development, mechanical support, signalling, flowering and stress response. Turgor pressure is an ideal means in plant cells through which the energy content of water molecules (water potential) can be adjusted quickly, within seconds.
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