Document Type : Research Paper

Authors

• heidar Ali Malmir
• Elham Kaviani

Biology Dept., Faculty of Science, Bu-Ali Sina University, Hamedan, I.R. of Iran

Abstract

Source and sink allocation organs play an important role in the balance between sugar production and consumption. In this experiment, the metabolism of carbohydrates and the activities of enzymes related to them were investigated in young leaves (sink), old leaves (source) and stems of Melissa plant after several plants were treated with smoke.

The results showed that with the increase ofsmoke time the fructose sugars in the source and sink decreased. The amount of sucrose decreased in the stem and the source and increased in the sink. The amount of verbascose, glucose, and fructose sugars increased in the source and decreased in the sink and stem. The amount of starch, raffinose, maltose increased in the sink and decreased in the source and stem. Comparing the change process of starch and sucrose, smoking increased the amount of sucrose in the destination and decreased the amount of starch. In fact, soot pollution has increased the amount of soluble sugar in the destination. The regression between SPS enzyme activity and sucrose synthesis in sink and source showed a correlation of R2=0.52 and R2=0.18, respectively. Therefore, the level of SPS enzyme activity in old leaves is higher than that of young leaves, or it is due to the lack of reduction of sucrose in the sink. The activity level of AI acid invertase enzyme, which is involved in breaking down sucrose, increased in the source,, which is involved in breaking down sucrose, increased in the source and destination.

Keywords

• pollution of smoke
• source and sink relation
• carbohydrate change
• the sucrose metabolism

Main Subjects

• Physiology