The effect of some ammonium salts on nitrate reductase level, onin vivo nitrate reduction and on nitrate content in excisedpisum sativum roots

Sahulka, J.

doi:10.1007/bf02926748

Cited by 17 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, either no effect or an enhancement of NRA in the presence of ammonium has been reported (3,23,24,31). …”

mentioning

confidence: 87%

“…

ABSTRACTThe effect of ambient ammonium (0.5 (10,23,24,25,28,31). In contrast, either no effect or an enhancement of NRA in the presence of ammonium has been reported (3,23,24,31).

…”

mentioning

confidence: 99%

“…Experiments were conducted with both dark-grown decapitated and light-grown intact corn seedlings, the roots of which are capable of nitrate reduction (17,24 Restricted net nitrate uptake (the difference between nitrate influx and efflux) in the presence of ambient ammonium has been reported for numerous higher plant species (e.g. 3,16,19,20,29,31). However, in certain experiments with corn (22,32) and barley (35), little or no effect has been observed.…”

mentioning

confidence: 99%

“…Decreases in NRA have been observed in a number of root systems (10,23,24,25,28,31). In contrast, either no effect or an enhancement of NRA in the presence of ammonium has been reported (3,23,24,31 h, the shoots were excised below the first node, the cotton was removed and replaced with black polypropylene beads, and a small funnel-shaped plastic exudate collector was attached to each mesocotyl and sealed with silicone grease. Twenty h prior to exposure to ['5N]nitrate, the cultures were transferred to fresh basal nutrient solution supplemented with 1.0 mm K"NO3.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Restricted Nitrate Influx and Reduction in Corn Seedlings Exposed to Ammonium

MacKown

Jackson²,

Volk³

1982

Plant Physiol.

View full text Add to dashboard Cite

show abstract

“…In contrast, either no effect or an enhancement of NRA in the presence of ammonium has been reported (3,23,24,31). …”

mentioning

confidence: 87%

“…

ABSTRACTThe effect of ambient ammonium (0.5 (10,23,24,25,28,31). In contrast, either no effect or an enhancement of NRA in the presence of ammonium has been reported (3,23,24,31).

…”

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Restricted Nitrate Influx and Reduction in Corn Seedlings Exposed to Ammonium

MacKown

Jackson²,

Volk³

1982

Plant Physiol.

View full text Add to dashboard Cite

show abstract

“…The tion. Ammonia has been shown to inhibit N03 uptake (14,15) and induction of NRA in roots, but seldom in leaves (2,20,22,23). Endogenously produced NH+, as a consequence of N03 and N02 reduction, can be incorporated into amino acids, which can be considered potentially regulatory substances (20)(21)(22)24).…”

Section: Been Studied In Detailmentioning

confidence: 99%

Expression of Nitrate and Nitrite Reductase Activities under Various Forms of Nitrogen Nutrition in Phaseolus vulgaris L.

Timpo¹,

Neyra²

1983

Plant Physiol.

View full text Add to dashboard Cite

ABSTRACTtion. Ammonia has been shown to inhibit N03 uptake (14,15) and induction of NRA in roots, but seldom in leaves (2,20,22,23). Endogenously produced NH+, as a consequence of N03 and N02 reduction, can be incorporated into amino acids, which can be considered potentially regulatory substances (20)(21)(22)24). Prior exposure of the plants to NH4' has been shown to increase the NO3-dependent induction of NRA (2, 24), and Schrader et aL (25) reported that the levels of NRA were higher in corn plants supplied with a combination of both NH4+ and NO3 as compared to N03 alone (25). Beevers et aL (3) reported that induction of NRA in corn leaves was specific for N03-and maximal induction of NRA is usually observed on plants exposed to N03-, but the requirement does not appear to be absolute (2, 7). Nitrite and some growth regulators have been shown to stimulate the appearance of NRA. We have consistently observed in our laboratory measurable levels of NRA in leaves of P. vulgaris plants grown with either N2 or urea as N sources. Similarly, Harper (8) reported that NR in soybean leaves was not detectable in plants grown in the absence of NO3 when nitrate was also omitted from the assay medium. In contrast, when N03 was supplied to the assay medium, NRA was detectable throughout the season and it was concluded that some finite level ofNR enzyme persists in soybeans even in the absence of N03-in the growing medium.The objective of the work reported here was to study the effects of different forms of nitrogen nutrition (NO3 -, NH44-, urea-, and Nr-dependent plants) on the levels of NRA in leaves of P. vulgaris grown under greenhouse conditions. The accumulation and distribution of dry matter and nitrogen in relation to the various N sources were included as complementary objectives.MATERIALS AND METHODS Plant Culture. Seeds of Phaseolus vulgaris (cv Bunsi) were surface sterilized prior to planting by a treatment with 75% ethanol

show abstract

Influence of boron on nitrate reductase activity in roots of Zea mays

Augsten

Michel

1986

Fundamental, Ecological and Agricultural Aspects of Nitrogen Metabolism in Higher Plants

View full text Add to dashboard Cite

The effect of some ammonium salts on nitrate reductase level, onin vivo nitrate reduction and on nitrate content in excisedpisum sativum roots

Cited by 17 publications

References 25 publications

Restricted Nitrate Influx and Reduction in Corn Seedlings Exposed to Ammonium

Restricted Nitrate Influx and Reduction in Corn Seedlings Exposed to Ammonium

Expression of Nitrate and Nitrite Reductase Activities under Various Forms of Nitrogen Nutrition in Phaseolus vulgaris L.

Influence of boron on nitrate reductase activity in roots of Zea mays

Contact Info

Product

Resources

About