Denitrification in the rhizosphere of plants with inherently different aerenchyma formation: Wheat (Triticum aestivum) and rice (Oryza sativa)

Prade, K.; Trolldenier, G.

doi:10.1007/bf00336228

Cited by 21 publications

(10 citation statements)

References 18 publications

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“…2 F). The bidirectional transport of gases through aerenchyma of rice roots has been well documented (Cicerone and Shetter, 1981 [11] ; Higudchi, 1982 [14] ; Higudchi et al, 1984 [15] ; Mosier et al, 1990 [23] ; Prade and Trolldenier, 1990 [28] ; Nouchi et al, 1990 [27] ; Nouchi and Mariko, 1993 [26] ).…”

Section: Aerenchyma In the Rootsmentioning

confidence: 99%

“…In order to adapt to flooded anoxic conditions, rice plants develop lysigenous intercellular spaces (aerenchyma) in both root and aboveground parts for transporting sufficient atmospheric O 2 to the roots to maintain aerobic respiration (van Raalte, 1941 [29] ; Armstrong, 1979 [3] ). Although the primary function of aerenchyma formation in rice plants appears to be the delivery of O 2 to their roots, in the process of bringing O 2 down to the submerged roots, rice plants transport several other gases such as CO 2 (Higudchi, 1982 [14] ; Higudchi et al, 1984 [15] ), N 2 , N 2 O (Mosier et al, 1990 [23] ; Prade and Trolldenier, 1990 [28] ; Aulakh et al, 1992 [6] ), and CH 4 (Cicerone and Shetter, 1981 [11] ; Nouchi et al, 1990 [27] ; Nouchi and Mariko, 1993 [26] ; Wassmann et al, 1996 [33] ; Wang et al, 1997 b [31] ) from the roots to the non-submerged parts above soil and water level and release these gases to the atmosphere. Thus, the anatomical analysis of aerenchyma of rice plants is of interest for understanding the exchange of gases, both from the atmosphere to the submerged soil, and from the soil to the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

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Pattern and Amount of Aerenchyma Relate to Variable Methane Transport Capacity of Different Rice Cultivars

et al. 2000

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Aerenchyma, developed in both root and aboveground parts of rice plants, is predominantly responsible for plant-mediated transfer of methane (CH 4 ) from the soil to the atmosphere. To clarify the pathways of CH 4 transport through the rice plant and find differences that may determine the large variation in the patterns of methane transport capacity (MTC) of rice cultivars, we examined the appearance, the distribution pattern, and the density of aerenchyma in different parts of rice plants of three widely varying rice cultivars during panicle initiation, flowering, and maturity stages. The data on the amount and density of small (> 1 × 10 3 -5 × 10 3 µm 2 ), medium (> 5 × 10 3 -20 × 10 3 µm 2 ) and large aerenchyma lacunae (> 20 × 10 3 µm 2 ) were collected using a computer assisted image-analyzing system. The brightfield optical microscopy of roots of all tested rice plants demonstrated the continuity of aerenchyma channels in the roots that function as conduits for bi-directional transport of gases. The aerenchyma channels of primary roots showed direct connection with those of culms. Intercalary meristems were found at the transition zone of rootculm aerenchyma connections. Well-developed aerenchyma lacunae present in the internodal region of the culm base were uniformly distributed in the peripheral cortical zone. The nodal region had relatively fewer and smaller aerenchyma lacunae that showed a non-uniform distribution pattern. As a result, few aerenchyma channels continued from the internodal region through to the nodal region. The aerenchyma in the cortex zone of the culm expanded along with the growing secondary tiller, developing continuity between the culm and the secondary tiller. The micrographs of longitudinal sections of different specimens of culm-leaf sheath intersection showed the continuity of aerenchyma channels from the culm to the leaf. The amount of medium and large aerenchyma lacunae in the leaf sheath was respectively 2 and 33 times greater as compared to those of the tiller. The proportion of the large lacunae in the total amount of aerenchyma in leaf sheath was 75 % as compared to only 8 % in the tiller, revealing higher number and larger size of aerenchyma in the former. There were significant differences in amount and density of aerenchyma between individual cultivars at a given growth stage, as well as in the development patterns. While the amount and density of medium and small aerenchyma lacunae in the internodal region of the culm base did not show any relationship with MTC of rice cultivars, large aeren-chyma lacunae exhibited highly significant correlations with MTC of different cultivars, suggesting that the wide variation in MTC of rice plants during different growth stages are related to these structural features.

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Section: Aerenchyma In the Rootsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pattern and Amount of Aerenchyma Relate to Variable Methane Transport Capacity of Different Rice Cultivars

et al. 2000

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“…Details of nutrient supply and substrate compaction have been described earlier (Prade and Trolldenier, 1990). Details of nutrient supply and substrate compaction have been described earlier (Prade and Trolldenier, 1990).…”

Section: Methodsmentioning

confidence: 99%

Incidence of Gaeumannomyces graminis var. tritici and K deficiency increase rhizospheric denitrification

Prade

Trolldenier

1990

Plant Soil

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Wheat inoculated with the root pathogen Gaeumannomyces graminis var. tritici (Ggt) was grown in quartz silt at two levels of potassium nutrition. While in plants well supplied with K the incidence of Ggt did not affect plant growth, it reduced shoot and root weight of K deficient plants. Denitrification, measured by the acetylene inhibition technique and expressed as N20/mg root weight, was increased either by low K nutrition or by Ggt infection. Highest denitrification in the rhizosphere of plants was found with a combination of both, K deficiency and Ggt attack.

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“…The nitrate concentration will be lowered not only by nitrate reduction but also by nitrate uptake by the plant [10,11]. Organic substrates are also released into the rhizosphere of aerenchymatous plants [12,13], thereby increasing the concentration of available organic substrates.…”

Section: Introductionmentioning

confidence: 99%

Competition for nitrate and glucose between Pseudomonas fluorescens and Bacillus licheniformis under continuous or fluctuating anoxic conditions

Nijburg

1998

FEMS Microbiology Ecology

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The dissimilatory nitrate-reducing bacterial community in the rhizosphere of aerenchymatous plant species such as Glyceria maxima, consists of oxidative, denitrifying and fermentative nitrate-ammonifying bacteria. To study the respective ecological niches of both types of nitrate-reducing bacteria, competition for nitrate or glucose between the representative denitrifier Pseudomonas fluorescens and the representative fermentative nitrate-ammonifying Bacillus licheniformis under continuous or fluctuating anoxic conditions were performed in continuous culture. Competition started by mixing the separate, steady-state mono-cultures of the two species at different ratios. All the experiments were performed at a dilution rate of 0.05 h 3I . The competition was followed by measuring concentrations of nitrogen, glucose and fatty acids and by determining the cell numbers of P. fluorescens and B. licheniformis. Under continuous anoxic nitrate-limited conditions and under certain fluctuating anoxic conditions (8 h 10% and 16 h 0% air saturation), B. licheniformis was able to maintain itself in the chemostat at a low percentage of 4^7%. Under continuous anoxic glucose-limited conditions and under specific fluctuating anoxic (16 h 10% and 8 h 0% air saturation) conditions, B. licheniformis washed out. The outcome of the competition was explained by a higher affinity of P. fluorescens for nitrate and glucose compared to B. licheniformis. B. licheniformis was able to maintain itself in the chemostat under continuous anoxic nitrate-limited conditions and under certain fluctuating anoxic conditions (8 h 10% and 16 h 0% air saturation) due to the fermentation of the remaining glucose. z

show abstract

Denitrification in the rhizosphere of plants with inherently different aerenchyma formation: Wheat (Triticum aestivum) and rice (Oryza sativa)

Cited by 21 publications

References 18 publications

Pattern and Amount of Aerenchyma Relate to Variable Methane Transport Capacity of Different Rice Cultivars

Pattern and Amount of Aerenchyma Relate to Variable Methane Transport Capacity of Different Rice Cultivars

Incidence of Gaeumannomyces graminis var. tritici and K deficiency increase rhizospheric denitrification

Competition for nitrate and glucose between Pseudomonas fluorescens and Bacillus licheniformis under continuous or fluctuating anoxic conditions

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