بررسی مکانیزمهای بیوشیمیایی مقاومت به کمبود فسفر در برنج در مسیر گلایکولیز

Rice is one of most important crops feeding about half of the world population. phosphorous is one of limiting factors of rice growth and its deficiency substantially decreases rice yield. in this study, we aimed to identify biochemical mechanisms of rice adaptation to phosphorous deficiency in leaf and root. we compared the metabolites in parental lines, nipponbare, and its near isogenic line (nil6-4) containing a major qtl for phosphorous uptake (pup1) on chromosome 12. phosphorous deficiency resulted in significant decrease in number of tillers and fresh weight in both parental line and its near isogenic line, however, this reduction was more pronounced in the parental line. analysis of the level of several soluble sugars and activity of enzymes involved in energy production revealed that phosphorous deficiency could lead to some changes in glycolysis pathway in rice near isogenic line so that the plant could cope with the atp shortage. it is most likely that enhancement of this biochemical pathways may increase rice adaptation to phosphorous deficiency and consequently increase plant production with less phosphorus fertilizer required.