The Effect of Nitrogen on Arabidopsis Plants

1362 Words6 Pages
The Effect of Nitrogen on Arabidopsis In the past years scientists have been trying to unlock the secret to gene sequencing in plants. If they were able to do this, it might just be one of the biggest science breakthroughs of all time. One of the easier ways to do this is to modify the genetic code of a plant and test it to see how it responds. A universal plant to use this technique on is the Arabidopsis. It is used because of its relatively small size and its relatively small genetic code. Plants need nitrogen to survive, but they cannot take it up directly. They have to take up nitrates and convert them to nitrogen. Because of this, plants have developed high-performance ways to take up nitrates because they are found in low concentrations. Their intake systems are so complex, they are able to take in just what they need, and not all that is available. Two types of variations in nitrate intake have developed. In some instances, plants respond to variations in light intensity, temperature, or stress conditions. In others, variations can occur during ontogeny, or the structural change in an organism. (Imsande, Touraine 1-2) Scientists have discovered many different ways that plants regulate nitrate intake. One way is that the supply of carbohydrates in phloem regulates the amount of nitrate intake. When new leaves emerge, there is a lifted level of carbohydrates within the plant which corresponds with a lifted rate of nitrate consumption. Another way is that there is a correlation between nitrate intake and amino acids. Amino acids inhibit nitrate intake and that more the more amino acids there are present in the plant, the more they inhibit the intake of nitrates. Yet another way is that when nitrate reduction occurs, alkaline ions are formed and to keep pH homeostasis, the plant must produce organic acids that, in turn, inhibit nitrate

More about The Effect of Nitrogen on Arabidopsis Plants

Open Document