The relation between nitrate reductase activity and grain nitrogen productivity in wheat

The seasonal patterns of leaf nitrate reductase activity were compared in five wheat cultivars which differ widely in their capacities to accumulate grain nitrogen. Significant differences in the average levels of nitrate reductase activity were observed between cultivars. Total seasonal nitrate reductase activity was closely related to total plant nitrogen at maturity. Grain nitrogen was only related to total seasonal nitrate reductase activity when allowance was made for significant differences between cultivars in nitrogen redistribution patterns. The significance of these results with respect to the possible use of nitrate reductase activity levels as a selection criterion for nitrogen productivity is discussed.

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Pre-Sowing Irrigation Plus Surface Fertilization Improves Morpho-Physiological Traits and Sustaining Water-Nitrogen Productivity of Cotton

Agronomy ◽

10.3390/agronomy9110772 ◽

2019 ◽

Vol 9 (11) ◽

pp. 772

Author(s):

Zongkui Chen ◽

Hongyun Gao ◽

Fei Hou ◽

Aziz Khan ◽

Honghai Luo

Keyword(s):

Nitrate Reductase ◽

Root Growth ◽

Root Length ◽

Crop Production ◽

Nitrate Reductase Activity ◽

Reductase Activity ◽

Soil Layer ◽

Dry Mass ◽

Cotton Production ◽

Nitrogen Productivity

The changing climatic conditions are causing erratic rains and frequent episodes of moisture stress; these impose a great challenge to cotton productivity by negatively affecting plant physiological, biochemical and molecular processes. This situation requires an efficient management of water-nutrient to achieve optimal crop production. Wise use of water-nutrient in cotton production and improved water use-efficiency may help to produce more crop per drop. We hypothesized that the application of nitrogen into deep soil layers can improve water-nitrogen productivity by promoting root growth and functional attributes of cotton crop. To test this hypothesis, a two-year pot experiment under field conditions was conducted to explore the effects of two irrigation levels (i.e., pre-sowing irrigation (W80) and no pre-sowing irrigation (W0)) combined with different fertilization methods (i.e., surface application (F10) and deep application (F30)) on soil water content, soil available nitrogen, roots morpho-physiological attributes, dry mass and water-nitrogen productivity of cotton. W80 treatment increased root length by 3.1%–17.5% in the 0–40 cm soil layer compared with W0. W80 had 11.3%–52.9% higher root nitrate reductase activity in the 10–30 cm soil layer and 18.8%–67.9% in the 60–80 cm soil layer compared with W0. The W80F10 resulted in 4.3%–44.1% greater root nitrate reductase activity compared with other treatments in the 0–30 cm soil layer at 54–84 days after emergence. Water-nitrogen productivity was positively associated with dry mass, water consumption, root length and root nitrate reductase activity. Our data highlighted that pre-sowing irrigation coupled with basal surface fertilization is a promising option in terms of improved cotton root growth. Functioning in the surface soil profile led to a higher reproductive organ biomass production and water-nitrogen productivity.

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Nitrogen Uptake of Field-grown Cotton. II. Nitrate Reductase Activity and Petiole Nitrate Concentration as Indicators of Plant Nitrogen Status

Experimental Agriculture ◽

10.1017/s0014479700010565 ◽

1983 ◽

Vol 19 (1) ◽

pp. 103-109 ◽

Cited By ~ 14

Author(s):

D. M. Oosterhuis ◽

G. C. Bate

Keyword(s):

Nitrate Reductase ◽

Seasonal Changes ◽

Nitrate Reductase Activity ◽

Nitrate Concentration ◽

Reductase Activity ◽

Soil N ◽

Plant Nitrogen ◽

Petiole Nitrate Concentration ◽

Leaf Nitrate ◽

N Status

SUMMARYThe possibility of using seasonal changes in leaf nitrate reductase activity (NRA) as a reliable and sensitive indicator of plant nitrogen (N) status has been investigated in field-grown cotton. These changes were compared with those in nitrate concentration in petioles and variations in soil-N concentration. We conclude that NRA in the uppermost, fully-expanded sympodial leaves may provide a more convenient, sensitive and reliable indicator of plant-N status than measurements of nitrate concentrations in petioles.

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In Vitro Nitrate Reductase Activity of Laboratory‐Grown Seedlings as an Indirect Selection Criterion for Maize

Crop Science ◽

10.2135/cropsci1993.0011183x003300060033x ◽

1993 ◽

Vol 33 (6) ◽

pp. 1280-1286 ◽

Cited By ~ 18

Author(s):

Boy Feil ◽

Rachain Thiraporn ◽

Peter Stamp

Keyword(s):

Nitrate Reductase ◽

Nitrate Reductase Activity ◽

Reductase Activity ◽

Selection Criterion ◽

Indirect Selection

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Effects of time of nitrate application on nitrate reductase activity, nitrate uptake, and symbiotic dinitrogen fixation in faba bean and pea

Canadian Journal of Botany ◽

10.1139/b88-224 ◽

1988 ◽

Vol 66 (8) ◽

pp. 1646-1652 ◽

Cited By ~ 13

Author(s):

François-P. Chalifour ◽

Louise M. Nelson

Keyword(s):

Nitrate Reductase ◽

Faba Bean ◽

Nitrate Reductase Activity ◽

Nitrate Uptake ◽

Rhizobium Leguminosarum ◽

Reductase Activity ◽

Pisum Sativum L ◽

Vicia Faba L ◽

Total Plant ◽

Lower Capacity

The effects of increasing concentrations of [Formula: see text] (0, 5, 10, or 15 mol∙m−3) supplied at planting or 7 or 14 days after planting were studied in faba bean (Vicia faba L.) and pea (Pisum sativum L.) inoculated with Rhizobium leguminosarum biovar viceae isolate 175F19. Averaged over all times of [Formula: see text] application, N2 fixation (acetylene reduction) was inhibited significantly more in pea than in faba bean. Times of [Formula: see text] application had little effect on N2 fixation for faba bean. In contrast, N2 fixation in pea was most strongly inhibited when [Formula: see text] was applied at planting and showed a decreasing sensitivity as [Formula: see text] applications were delayed to 7 and 14 days after planting. At all times of [Formula: see text] application, as the levels of [Formula: see text] increased, the proportion of total plant nitrate reductase activity contributed by leaves and roots remained relatively constant in faba bean, but these proportions increased and decreased, respectively, in pea. Nitrate was taken up at higher levels and at a greater rate in pea than in faba bean. The lower capacity for [Formula: see text] uptake in faba bean could contribute to the greater tolerance of the symbiosis to [Formula: see text] compared with that in pea.

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