EFFECTS OF TEMPERATURE, LEVELS OF NITRATE SUPPLY AND DURATION OF LIGHT AND GROWTH ON NITRATE REDUCTASE ACTIVITY IN <i>AGEOSTIS TENUIS</i> AND <i>AGROSTIS STOLONIFERA</i>

Harris, Peter; Whittington, W. J.

doi:10.1111/j.1469-8137.1983.tb03423.x

Cited by 9 publications

(13 citation statements)

References 16 publications

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“…Relative contributions of root and shoot tissue to the assimilation of nitrate and its subsequent reduction, however, differ widely between species as well as being dependent upon the nitrate concentration around roots (Kato, Tachibana & Inden, 1974;Lee & Stewart, 1978). Even nitrate metabolism by ecotypes and cultivars of the same species may vary (Rajagopal, Rao & Sinha, 1976;Harris & Whittington, 1983). Use of ^^NO2 has also shown that, once inside a plant, ^^N can be transferred to all parts of the plant except mature leaves (Yoneyama et al, 1980a;Okano et al, 1984).…”

Section: Levels Of the Products Of No And No2 In Cellsmentioning

confidence: 99%

Tansley Review No. 24 Why are atmospheric oxides of nitrogen usually phytotoxic and not alternative fertilizers?

1990

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SUMMARY Atmospheric pollution by the oxides of nitrogen, NO and NO2, can cause reductions in growth but rarely visible injury. This review considers their uptake into foliage, as well as their subsequent metabolism and physiology, and attempts to explain why these gases are often phytotoxic. The combined stresses of resisting cellular acidification, enhanced levels of nitrite (and ammonia), and the direct interference of the free radical ('N=O) with critical enzymes, reaction centres and regulatory mechanisms are thought to be the main reasons why oxides of nitrogen, especially NO, inhibit growth. If other air pollutants such as SO2 are also present with NO or NO2 then free radical‐induced injury, similar to that caused by O3 alone, also occurs.

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Section: Levels Of the Products Of No And No2 In Cellsmentioning

confidence: 99%

Tansley Review No. 24 Why are atmospheric oxides of nitrogen usually phytotoxic and not alternative fertilizers?

1990

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“…This appeared to be confirmed by results in Experiment 1 where A. stolonifera was found to grow faster than A. tenuis and to be more productive. No NRA measurements were taken in this experiment but in an investigation reported earlier (Harris and Whittington, 1983) using the same genotypes, A. tenuis was found to have the higher NRA. Results in the second experiment using seedlings of different varieties suggested that when young plants were crowded together there was no difference in productivity as had been found under the uncrowded conditions of Experiment 1.…”

Section: Discussionmentioning

confidence: 87%

“…It is, therefore, possible that A. stolonifera only exceeds A. tenuis when its greater tillering capacity can be expressed. In an equivalent experiment (Harris and Whittington, 1983) no differences between the species in NRA levels was found.…”

Section: Discussionmentioning

confidence: 91%

“…In this experiment NRA activity was determined by an in vivo method (Harris and Whittington, 1983) and in each experiment harvested material was oven dried at 90 °C for 48 h. During the months of October 1981 to March 1982, no analyses were possible since growth was slowed by severe weather.…”

Section: Methodsmentioning

confidence: 99%

“…Further work on NRA in these species (Harris and Whittington, 1983) showed that age, duration of light, temperature and nitrate supply all modified NRA activity. The results also indicated that where studies were made on plants grown in growth rooms at high levels of nitrate supply and on plants established for some time from either tillers or as dense swards from seeds, the in vivo NRA activity was actually higher in A. stolonifera than A. tenuis.…”

Section: Introductionmentioning

confidence: 99%

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The Relationship Between Nitrate Reductase and Plant Productivity in Agrostis Species

Harris

Whittington

1983

New Phytologist

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SUMMARYAlthough many ecological and agricultural experiments have sought to prove that nitrate reductase activity (NRA) could be directly related to productivity, this has proved to be difficult. The experiments indicate that Agrostis tenuis and A. stolonifera may differ in both productivity and NRA but the results are much affected by environmental factors such as temperature, plant density and probably by variety. The environment can apparently determine whether the products of NRA are directed into storage protein or directly into grovi^th. Thus, while NRA should always be correlated with total plant nitrogen, experiments may show a negative, positive or no relationship at all between growth and NRA depending on the environments imposed during the period of observation because alternatives exist for the utilization of reduced nitrate.

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Comparison of nitrogen assimilation components among Agrostis species and cultivars

DaCosta

Ebdon

Chappell

2022

Intl Turfgrass Soc Res J

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Enhanced nitrogen use efficiency (NUE) in turfgrass systems comprises several factors, including more efficient uptake and assimilation of applied nitrogen (N), as well as reduced N losses to the environment. The objectives of the current research were to evaluate the inter-and intraspecific variation in N use parameters in two Agrostis species, creeping bentgrass (Agrostis stolonifera L.) and velvet bentgrass (Agrostis canina L.), under field and controlled environmental conditions. Measurements included leaf NUE (g dry matter mg -1 N), leaf N content (mg g -1 dry matter), leaf and root nitrate reductase activity (NRA)(μmol NO 2 g -1 fresh weight h -1 ), and root nitrate uptake rate (NUR). Velvet bentgrass cultivars exhibited higher leaf N content and therefore lower leaf NUE than creeping bentgrass cultivars in the field and in a nutrient solution. Differences in leaf NRA were only observed in Agrostis species and cultivars in the field, with higher NRA observed in creeping bentgrass. Velvet bentgrass cultivars grown in a nutrient solution exhibited a 50% higher root NUR than creeping bentgrass, with leaf NRA and N content increasing and leaf NUE decreasing in Agrostis under higher NO 3 supply.

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EFFECTS OF TEMPERATURE, LEVELS OF NITRATE SUPPLY AND DURATION OF LIGHT AND GROWTH ON NITRATE REDUCTASE ACTIVITY IN AGEOSTIS TENUIS AND AGROSTIS STOLONIFERA

Cited by 9 publications

References 16 publications

Tansley Review No. 24 Why are atmospheric oxides of nitrogen usually phytotoxic and not alternative fertilizers?

Tansley Review No. 24 Why are atmospheric oxides of nitrogen usually phytotoxic and not alternative fertilizers?

The Relationship Between Nitrate Reductase and Plant Productivity in Agrostis Species

Comparison of nitrogen assimilation components among Agrostis species and cultivars

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