It is at this stage of the reaction that oxygen is produced as a waste product. Emerson 1929 observed a direct relationship between chlorophyll content of the leaf and the rate of photosynthesis. A brief account on these three aspects is given as follows: Factor 4. Now, its your turn to get into groups and discuss the factors affecting the rate of photosynthesis. Less than 1% of the water absorbed by a plant is used in photosynthesis. The sun is the main source of light energy.
At a very high oxygen concentration, the rate of photosynthesis begins to decline in all the plants. Photosynthesis hardly starts at about 5°C in tropical plants. In this example the intensity of light is the limiting factor for the rate of photosynthesis. If the pH is too acidic or too basic, the rate at which photosynthesis occurs will decrease. This is the difference between plants and animals. Photophilous plants responds favourably to higher light intensities than sciophilous plants.
Plants cannot photosynthesise if it gets too hot. But this is soon followed by a decline. This indicates that protoplasm is not necessary for photosynthesis. This increase is more rapid up to I % of carbon dioxide concentration. This is the answer I got from yahoo.
To do this experiment I am going to set up the apparatus as shown in figure 1. They affect the dark reactions. When the concentration of the reactants such as the enzyme catecholase, and the substrate catechol were tested, the results of product formation increased greatly because the higher concentrations… 1477 Words 6 Pages Introduction: In biology, one of the factors that characterize a living organism is its ability to carry out necessary chemical reactions for its survival. In simpler terms, it is the basic mechanism of food generation. The remaining distances are 0. Temperature Temperature in the range of 10-35 °C is optimum for photosynthesis. I… 1827 Words 8 Pages Abstract: This investigation presents what would occur to the reaction rate of an enzyme if the temperature, pH level, concentration of a substrate and enzyme were changed.
At a point saturation may be reached, when further increase in light intensity fails to induce increase in photosynthesis. From these recorded times I will work out the rate of the reaction using the following equation. Hence it is futile to debate its importance. Air Pollutants: Gaseous and metallic pollutants decrease photosynthetic activity. Draw the gases out of the spongy mesophyll tissue and infiltrate the leaves with the sodium bicarbonate solution.
. Put a small volume around 5 cc of sodium bicarbonate with the soap solution from the prepared cup into one syringe and a small volume of water with soap into the other syringe. Background Knowledge There are four factors that can affect the rate of reaction and they all rely on the collision theory. Even if there is plenty of light, the plant cannot photosynthesize in the absence of sufficient amount of carbon dioxide. Light Intensity - the amount of light in the environment varies greatly between night and day. However, the maximum rate of photosynthesis is observed in orange-red light 600-700 nm and second maximum in the blue-violet light 430-470 nm. The Co2 combines with existing molecules to produce organic aids, trapping the carbon within the leaves.
The decline may be due to one or more of the following causes: i Accumulation of the end products of photosynthesis. Planting trees and other plants is one component of the solution to global warming, but the number of plants we have now cannot consume more carbon than they already do, and there is some evidence that warmer temperatures make photosynthesis more difficult. High concentrations of oxygen inhibit the rate of photosynthesis. This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable. Carbon dioxide concentration Sometimes photosynthesis is limited by the concentration of carbon dioxide in the air. The additional cost of the carbon dioxide is worthwhile because of the increased yield.
Basically, carbon dioxide is synthesised together with water and air molecules using the sun's energy to produce both oxygen and glucose. Extracts of this project must not be included in any projects that you submit for marking. Therefor, it cannot be a limiting factor directly. The rate for a light intensity of 400 is 5. The implication of this hypothesis is that at any given time, photosynthesis can be limited either by light intensity or by C0 2 concentration, but not by both the factors.