Interaction of phosphorus and molybdenum in relation to uptake and utilization of molybdenum, phosphorus, zinc, copper and manganese by rice

Abstract

The effect of phosphorus and molybdenum alone and combined, on the uptake and utilization of Mo, Mn, Zn, Cu and P by rice (Var. 1R-579) was studied in the greenhouse at varying levels of Mo (0, 2.5 and 5.0 ppm) and P (0, 100 and 200 ppm). Application of P increased the dry matter yield of shoot and root. Combined application of P and Mo increased the dry matter yield of shoot. Application of M o increased the concentration of Mo and P in shoot. Applied P caused an increase in the concentration of Mo, Zn and P in shoot. Combined application of P and Mo resulted in an increase in concentration and uptake of Mo in shoot.

INTERACTION OF MOLYBDENUM AND PHOSPHORUS SUPPLY ON UPTAKE AND TRANSLOCATION OF PHOSPHORUS AND MOLYBDENUM BYBRASSICA NAPUS

“…These results indicated that there was a synergistic effect between the two elements on P absorption by plants. A similar favorable effect of Mo on the concentration and uptake of P and the synergism between the two elements were also reported by Basak et al (1982) and Singh and Kumar (1979). However, it has been reported that Mo had a decrease effect on the uptake of P by plants.…”

“…The similar result has been reported by Basak et al (1982) in rice, and a hypothesis that P addition increased the release of Mo from the root cells into the translocation system ensuring its effective utilization by plants, was also raised (Stout et al, 1951). Molybdenum was retained mainly in the roots of plants, particularly in the case of higher Mo supply (Kannan and Ramani, 1978).…”

“…Increasing solution Mo from 0 to 0.01 mg L −1 remarkably enhanced (P < 0.05) roots growth at the levels of 1 and 30 mg L −1 solution P, as did increasing solution Mo from 0 to 0.1 mg L −1 at the level of 90 mg L −1 solution P (Figure 1b). The results indicated that 0.01 mg L −1 of solution Mo also had an obvious stimulating effect on root growth for Brassica napus seedlings, which were similarly reported by Basak et al (1982) who suggested that the increase in the growth of rice may be due to the beneficial effect of Mo on the P metabolism of the plants.…”

“…There have been several research studies about the interactions of molybdenum (Mo) and phosphorus (P) on the absorption of nutrients by tomato (Stout and Meagher, 1948;Stout et al, 1951), soybean (Singh and Kumar, 1979), rice (Basak et al, 1982), wheat (Modi, 2002), etc. However, the results in this regard are conflicting so far.…”

“…However, the results in this regard are conflicting so far. Some researchers believe that there is a synergistic interaction of Mo and P on their uptakes; for example, Mo presence could enhance P uptake by plants and vice versa (Stout and Meagher, 1948;Singh and Kumar, 1979;Basak et al, 1982). However, others held that there might be antagonistic effects between them.…”