scholarly journals Relation between Glutamine Synthetase and Nitrogenase Activities in the Symbiotic Association between Rhizobium japonicum and Glycine max

1976 ◽  
Vol 57 (4) ◽  
pp. 542-546 ◽  
Author(s):  
Paul E. Bishop ◽  
Juan G. Guevara ◽  
Jean A. Engelke ◽  
Harold J. Evans
Keyword(s):  
Glycine Max ◽  
Glutamine Synthetase ◽  
Rhizobium Japonicum ◽  
Symbiotic Association ◽  
Nitrogenase Activities

Calcium, Iron and Cobalt Accumulation in Root Hairs of Soybean (Glycine max)

1985 ◽  
Vol 40 (11-12) ◽  
pp. 912-913 ◽  
Author(s):  
Dietrich Werner ◽  
Klaus-Peter Kuhlmann ◽  
Frank Gloystein ◽  
Friedrich-W. Richter
Keyword(s):  
Triticum Aestivum ◽  
Glycine Max ◽  
Root System ◽  
Root Hairs ◽  
The Other ◽  
Rhizobium Japonicum ◽  
Target Cells ◽  
Iron Cobalt ◽  
Calcium Iron

Abstract Root hairs of soybeans (Glycine max), target cells for infection by Rhizobium japonicum accumulate iron more than 10-fold, cobalt more than 8-fold and calcium more than 7-fold compared to the other parts of the root system. In root hairs of wheat (Triticum aestivum) a much smaller accumulation of these elements was found. The symbiont of Glycine max, Rhizobium japonicum, is known to have a high requirement for iron, cobalt and calcium.

EFFECTS OF INOCULATION AND FERTILIZER N LEVELS ON N2 FIXATION AND YIELDS OF SOYBEANS IN ONTARIO

1979 ◽  
Vol 59 (4) ◽  
pp. 1129-1137 ◽  
Author(s):  
ERNEST SEMU ◽  
D. J. HUME
Keyword(s):  
Glycine Max ◽  
Rhizobium Japonicum ◽  
Soil N ◽  
Fertilizer N ◽  
Fertilizer Nitrogen ◽  
Nodule Number ◽  
Glycine Max L ◽  
Yield Responses ◽  
Seed Yields ◽  
Nodule Efficiency

Soybeans (Glycine max (L.) Merrill) often do not give yield responses to added fertilizer nitrogen (N) because high soil N levels inhibit fixation of atmospheric N2. Yield responses to N fertilizer applied at planting usually indicate that N2 fixation is less than optimal. The effects of inoculation with Rhizobium japonicum, and fertilizer N levels, on soybean N2(C2H2) fixation and seed yields in Ontario were investigated in ’ 1976 and 1977. Three locations were used each year, representing areas where soybeans had been grown for many years (Ridgetown), for only a few years (Elora), or not at all (Woodstock). Treatments were (a) Uninoculated + 0 N, (b–e) Inoculated + 0, 50, 100 or 200 kg N/ha. Results indicated that inoculation increased seed yields only when soybeans were introduced into new areas. Fertilizer N applications at planting time did not increase yields in areas where soybeans had been grown several times previously, indicating that N2 fixation could support maximum yields. Nodule number and mass, and N2(C2H2) fixation rates were all decreased by fertilizer N. An increase in nodule efficiency, later in the season, in high N treatments was most marked at Ridgetown.

Effects of supplementary nitrogen fertilizer on nodulation, yield and seed characteristics of soybean (Glycine max) on the Darling Downs

1975 ◽  
Vol 15 (76) ◽  
pp. 694 ◽  
Author(s):  
AJP Williamson ◽  
A Diatloff
Keyword(s):  
Glycine Max ◽  
Nitrogen Content ◽  
High Temperatures ◽  
Nitrogen Fertilizer ◽  
Rhizobium Japonicum ◽  
Research Station ◽  
Climatic Data ◽  
Depressive Effect ◽  
Four Seasons ◽  
Applied Nitrogen

In field experiments with soybeans (Glycine max) conducted over four seasons at Hermitage Research Station, Queensland, levels of applied nitrogen (as urea) up to 134 kg ha -1 were examined. Nodulated soybeans failed to respond to applied nitrogen in three out of the four seasons. A response was obtained in one season when abnormal climatic conditions of low rainfall and high temperatures resulted in a comparatively lower level of nodulation. The probability of such a response is discussed in relation to climatic data of the area over the past 108 years. Nodulation and nitrogen fertilizer increased seed size and nitrogen content of the seed in soils free of Rhizobium japonicum but nitrogen fertilizer had little effect on these characteristics in soils carrying R. japonicum. Oil content of the seed was negatively correlated with the nitrogen content in rhizobia-free soils. Nitrogen fertilizer had a depressive effect on nodulation. This effect was severe when inoculated soybeans were grown in soil free of R. japonicum particularly under conditions of declining soil moisture and high temperatures. In soils with R. japonicum the depressive effect was comparatively light.

scholarly journals Early Events in the Infection of Soybean (Glycine max L. Merr) by Rhizobium japonicum

1980 ◽  
Vol 66 (6) ◽  
pp. 1027-1031 ◽  
Author(s):  
T. V. Bhuvaneswari ◽  
B. Gillian Turgeon ◽  
Wolfgang D. Bauer
Keyword(s):  
Glycine Max ◽  
Rhizobium Japonicum ◽  
Glycine Max L

PRODUCTION PRACTICES FOR EARLY MATURING SOYBEANS IN SOUTHERN ALBERTA

1983 ◽  
Vol 63 (3) ◽  
pp. 641-647 ◽  
Author(s):  
S. DUBETZ ◽  
D. J. MAJOR ◽  
R. J. RENNIE
Keyword(s):  
Glycine Max ◽  
Field Capacity ◽  
Rhizobium Japonicum ◽  
Yield And Quality ◽  
Southern Alberta ◽  
Early Maturing ◽  
Glycine Max L ◽  
Production Practices ◽  
Irrigation Requirements

Four experiments were conducted at two locations in southern Alberta, where no indigenous Rhizobium japonicum existed, to determine the effects of seeding dates, fertilizers, irrigation, and method of inoculant placement on the yield and quality of several early-maturing soybean (Glycine max (L.) Merrill) cultivars. Highest yields were obtained when soybeans were seeded during the first half of May. Irrigation requirements varied between years but yields were similar whether soil moisture was depleted to the 6 × 104-Pa or the 3 × 104-Pa level before irrigating to field capacity. Soybean yields increased substantially from N fertilizer when the inoculant was applied to the seed without a sticker. When granular inoculant was banded with the seed there was no response to N, and the yields of inoculated plants were higher than those of plants that were uninoculated and received up to 160 kg N/ha. When properly inoculated, early-maturing cultivars such as King Grain strain X005 and Maple Presto were capable of maturing and producing seed of acceptable yield and quality in southern Alberta.Key words: Cultivars, fertilizer, irrigation, inoculant, Glycine max (L.) Merrill

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