Effect of molybdenum on growth of winter wheat seedlings induced by low temperature II. Effect on nitrogen metabolism

Low temperature ( LT,-5～0℃) has been underway for 24h when winter wheat seedlings are 28 days old The results as followed : Mo deficiency has no obvious effects on N content of whole plant but affects distribution of it significantly Under normal temperature (NT) conditions, N content in shoot of Mo applied decreases significantly, while that in root increases obviously,and N content in root has no distinct difference between Mo deficiency and Mo application under LT condition Soluble protein contents in shoot and root have no relation with Mo and LT Under NT conditions, free amino acid content of shoot is enhanced obviously by Mo;after induced by LT, that of both shoot and root increase significantly, especially shoot Nitrate reductase activity of Mo applied keeps at a relative high level under LT conditions