The effects of soybean cultivar, rhizobium strain and nitrate on plant growth, nodule mass and acetylene reduction rate

1987 ◽  
Vol 98 (2) ◽  
pp. 285-293 ◽  
Author(s):  
B. R. Buttery ◽  
V. A. Dirks
Keyword(s):  
Plant Growth ◽  
Acetylene Reduction ◽  
Reduction Rate ◽  
Soybean Cultivar ◽  
Rhizobium Strain ◽  
Acetylene Reduction Rate

Lichenized unicellular cyanobacteria fix nitrogen in the light

2007 ◽  
Vol 85 (10) ◽  
pp. 1003-1006 ◽  
Author(s):  
P. D. Crittenden ◽  
X. Llimona ◽  
L. G. Sancho
Keyword(s):  
Diurnal Variation ◽  
Acetylene Reduction ◽  
Nitrogenase Activity ◽  
Reduction Rate ◽  
Carbon Flow ◽  
Diurnal Pattern ◽  
Fungal Symbiont ◽  
Minimum Rate ◽  
Isothermal Conditions ◽  
Acetylene Reduction Rate

Diurnal variation in N2-fixation (acetylene reduction) rate was measured in Thyrea girardii (Durieu & Mont.) Bagl. & Carestia and Thyrea confusa Henssen, lichens containing a unicellular cyanobacterial photobiont. In field assays, mean acetylene-reduction rates in the light were 25.8 ± 8.9 (n = 11) and 21.0 ± 5.6 nmol C2H4·g–1·h–1 (n = 13) for T. girardii and T. confusa, respectively, and the respective mean rates in the dark were 8.2 ± 1.8 (n = 26) and 13.5 ± 5.4 (n = 8) nmol C2H4·g–1·h–1. In laboratory assays under relatively isothermal conditions (ca. 19–22 °C), the maximum acetylene reduction rate (52.0 ± 6.0 nmol C2H4·g–1·h–1) was recorded in the light and the minimum rate (20.2 ± 6.0 nmol C2H4·g–1·h–1) in the dark. This diurnal pattern is contrary to expectations for unicellular cyanobacteria. We suggest carbon flow to the fungal symbiont reduces the potential for nitrogenase activity in the dark.

Genetic Variation for Acetylene Reduction Rate and Other Characters in Alfalfa

Crop Science ◽  
1981 ◽  
Vol 21 (4) ◽  
pp. 485-488 ◽  
Author(s):  
Geok‐Yong Tan
Keyword(s):  
Genetic Variation ◽  
Acetylene Reduction ◽  
Reduction Rate ◽  
Acetylene Reduction Rate

Nitrogen fixation associated with Scirpus atrovirens and other nonnodulated plants in Massachusetts

1978 ◽  
Vol 56 (21) ◽  
pp. 2636-2640 ◽  
Author(s):  
Todd M. Kana ◽  
John D. Tjepkema
Keyword(s):  
Nitrogen Fixation ◽  
Acetylene Reduction ◽  
Reduction Rate ◽  
Herbaceous Plant ◽  
Soil Incubation ◽  
Old Field ◽  
Fourfold Increase ◽  
Constant Rate ◽  
Moderate Rate ◽  
Acetylene Reduction Rate

Nitrogen fixation was measured using the acetylene reduction technique in soil cores of 13 nonnodulated, herbaceous plant species growing in mesic and wetland habitats. Six species that grew in a well-drained portion of an old field exhibited low rates of N2 fixation (7 g N∙ha−1∙day−1). A bulrush, Scirpus atrovirens, which grew in an area of compacted soil in the old field, showed a moderate rate of N2 fixation (30–100 g N∙ha−1∙day−1). These old field species exhibited a lag of only a few hours before a constant rate of acetylene reduction occurred. The estimated rates for the six wetland species were generally higher, and there was a lag such that the activity was still increasing after 20 h of incubation. N2 fixation in cores of S. atrovirens was primarily associated with the roots and adhering soil. Incubation of the cores in N2 for 24 h caused a fourfold increase in the acetylene reduction rate over that in air, although the rates during the first 4 h were similar.

Nitrogen fixation and methane metabolism in a stream sediment–water system amended with leaf material

1981 ◽  
Vol 27 (5) ◽  
pp. 511-516 ◽  
Author(s):  
T.-Y. Tam ◽  
C. I. Mayfield ◽  
W. E. Inniss
Keyword(s):  
Methane Production ◽  
Acetylene Reduction ◽  
Reduction Rate ◽  
Water System ◽  
Stream Sediment ◽  
Leaf Material ◽  
Oxidation Of Methane ◽  
Acetylene Reduction Rate ◽  
Low Levels ◽  
Methane Metabolism

The reduction of acetylene and the production and oxidation of methane in a stream sediment–water system amended with either fresh leaves or autumn-shed leaves in the presence and absence of air were studied. Net methane production by the sediment–water system occurred only when leaf material was added, with fresh leaves giving 2.2 times the methane accumulation as autumn-shed leaves. Static incubation in the presence of air had little effect on net methane production, with such production being about the same as (with fresh leaves) or 79% of (with autumn-shed leaves) the anaerobic rates. Acetylene reduction was more affected by the presence of air, with anaerobic rates being at very low levels. The presence of fresh leaves was again stimulatory, with the acetylene reduction rate being 5.5-fold greater than that occurring with autumn-shed leaves.

Nodule biomass and acetylene reduction rates of red alder and Sitka alder on Vancouver Island, B.C.

1981 ◽  
Vol 11 (2) ◽  
pp. 282-287 ◽  
Author(s):  
Dan Binkley
Keyword(s):  
Nitrogen Fixation ◽  
Acetylene Reduction ◽  
Reduction Rate ◽  
Vancouver Island ◽  
Fixation Rate ◽  
Red Alder ◽  
Nodule Biomass ◽  
Closed Canopy ◽  
Management Alternative ◽  
Acetylene Reduction Rate

Three comparisons examined acetylene reduction rate and nodule biomass of red alder (Alnusrubra Bong.) and Sitka alder (Alnussinuata (Regel) Rydb.) on Vancouver Island, British Columbia. The first showed that the acetylene reduction rates of Sitka alder on four sites in early July 1979 varied from 8.8 to 22.0 μmol C2H2•g−1 dry nodule per hour; smaller nodules had the higher rates. In the second comparison, red alder and Sitka alder acetylene reduction rates for young plants were similar when assayed on the same day on the same site. Finally, acetylene reduction rates and nodule biomass were determined for both species growing in closed canopy stands on adjacent sites. In this pair of 20-year-old stands, red alder had double the acetylene reduction rate and three times the nodule biomass of the Sitka alder. Combining the nodule biomass estimates with the seasonal average reduction rates yielded current annual nitrogen fixation estimates (using C2H2) of 130 kg•ha−1•year−1 for the red alder plot and 20 kg•ha−1•year−1 for the Sitka alder plot. These estimates are within published ranges for the species. The lower fixation rate of Sitka alder is still substantial, relative to the nitrogen demands of conifers, and its shrub-like growth form makes it an attractive management alternative to red alder for biological nitrogen fixation in mixed conifer–alder plantations.

Identification of North American soybean lines that form nitrogen-fixing nodules with Rhizobium fredii USDA257

1992 ◽  
Vol 72 (1) ◽  
pp. 49-55 ◽  
Author(s):  
P. A. Balatti ◽  
S. G. Pueppke
Keyword(s):  
United States ◽  
North American ◽  
Acetylene Reduction ◽  
Reduction Rate ◽  
Nitrogen Fixing ◽  
Maturity Group ◽  
Midwestern United States ◽  
Rhizobium Fredii ◽  
Acetylene Reduction Rate

Rhizobium fredii produces nitrogen-fixing (Fix+) nodules on primitive soybean lines, but most strains do not form such structures with the small number of agronomically advanced lines that have been tested. We systematically evaluated the ability of R. fredii USDA257 to produce Fix+ nodules on 197 soybean lines available in the midwestern United States. Thirty-four of 197 such lines were Fix+. The frequency of this response was positively correlated with increasing maturity group. The acetylene-reduction rate of one advanced cultivar, Davis, was greater than that of the primitive cultivar, Peking. Our data indicate that the capacity to nodulate effectively with USDA257 is widespread in contemporary North American soybean lines.Key words: Acetylene-reduction, nodulation, Rhizobium, soybean

Effect of seed biopriming with indigenous PGPR, Rhizobia and Trichoderma sp. on growth, seed yield and incidence of diseases in French bean (Phaseolus vulgaris L.)

2019 ◽  
Author(s):  
Shivangi Negi ◽  
Narender K. Bharat ◽  
Manish Kumar
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Seed Yield ◽  
Untreated Control ◽  
Seed Treatment ◽  
French Bean ◽  
Rhizobium Strain ◽  
Pod Yield ◽  
Seed Biopriming ◽  
Final Harvest

The effect of seed biopriming with different bioagents including plant growth promoting rhizobacteria (PGPR-1), rhizobial biofertilizer (Rhizobium strain B1) and biological control agent (Trichoderma viride) was observed on plant growth, seed yield and incidence of diseases in French bean cv. Contender conducting a field experiment during kharif season in the year 2017 and 2018. Under field conditions in both the years, field emergence (95.18 %), plant height at 30 days after sowing (34.09 cm), plant height at final harvest (56.99 cm), days to pod harvest (52.33), harvest duration (18.67), pod length at final harvest (16.83 cm), number of pods per plant (20.17), dry pod weight (2.72 g), pod yield per plant (38.64 g), number of seeds per pod (7.17), seed yield per plant (20.76 g), seed yield per plot (875.33 g), seed yield per hectare (23.34 q), 100 seed weight (34.19 g), quality of harvested seeds were recorded significantly higher after seed biopriming with PGPR-1+ Rhizobium strain B1 (T4) as compared to carbendazim seed treatment and untreated control. This treatment combination also reduced the incidence of major diseases like, Rhizoctonia root rot and Angular leaf spot significantly as compared to carbendazim seed treatments and untreated control. It can be concluded from the present investigation that seed biopriming of French bean cv. Contender with PGPR-1+Rhizobium strain B1 @ 109cfu/ml for 8 hours was an effective treatment which significantly improved plant growth, pod yield, seed yield, seed quality and seed vigour and reduced disease incidence as compared to seed treatment with carbendazim @ 0.2% as well as untreated control under field conditions.

Changes in 15N natural abundance of biologically fixed N2 in soybean due to shading, rhizobium strain and plant growth stage

2018 ◽  
Vol 426 (1-2) ◽  
pp. 413-428 ◽  
Author(s):  
Karla E. C. Araujo ◽  
Carlos Vergara ◽  
Ana Paula Guimarães ◽  
Janaina R. C. Rouws ◽  
Claudia P. Jantalia ◽  
...  
Keyword(s):  
Plant Growth ◽  
Growth Stage ◽  
15N Natural Abundance ◽  
Natural Abundance ◽  
Rhizobium Strain

scholarly journals Temperature Tolerant Rhizobium leguminosarum bv. viciae Strains with Plant Growth Promotion Traits

2020 ◽  
Vol 14 (4) ◽  
pp. 2603-2609
Author(s):  
Arun Kumar Patel ◽  
Umakant Banjare ◽  
Ajjo Kumari ◽  
Ramesh Kumar Singh ◽  
Kapil Deo Pandey
Keyword(s):  
Calcium Phosphate ◽  
Pisum Sativum ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Rhizobium Leguminosarum ◽  
Root Nodule ◽  
Growth Promotion ◽  
Rhizobium Strain ◽  
Pisum Sativum L ◽  
Different Temperatures

Rhizobacteria (PGPR) that promote the plant growth are essential component of sustainable agriculture. Pea (Pisum sativum L.) root nodule Rhizobium leguminosarum bv. viciae ten strains were cultured at two different temperatures (28°C and 45°C). Out of eight strains screened the three N25, N30 and N40 were temperature tolerant while only one strain (N40) showed tolerance to pH11. The growth of Rhizobium strain N40 at 45 °C was 96.8 percent as compared to the growth of the at 28°C. The temperature tolerant strain N40 produced maximum IAA and solubilized insoluble tri calcium phosphate compared to other strains and thus can be used microbial inoculant in biofertilizer technology.

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