Genomics OF Root Nodulation In Soybean

2007 ◽  
pp. 435-452 ◽  
Author(s):  
Kyujung Van ◽  
Moon Young Kim ◽  
Suk-Ha Lee
Keyword(s):  
Root Nodulation

scholarly journals Influence of PRE-emergence herbicides on soybean development, root nodulation and symbiotic nitrogen fixation

2021 ◽  
Vol 144 ◽  
pp. 105576
Author(s):  
Victor Hugo Vidal Ribeiro ◽  
Lucas Gontijo Silva Maia ◽  
Nicholas John Arneson ◽  
Maxwel Coura Oliveira ◽  
Harry Wood Read ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Symbiotic Nitrogen Fixation ◽  
Root Nodulation

Acacia crassicarpa (northern wattle).

2021 ◽  
Author(s):  
Nick Pasieczni ◽  
Duncan McDonald
Keyword(s):  
Imperata Cylindrica ◽  
Low Fertility ◽  
Soil Types ◽  
Weed Species ◽  
Root Nodulation ◽  
Seasonally Dry ◽  
Dry Tropics ◽  
Acacia Crassicarpa ◽  
Round Timber ◽  
Pulp Production

Abstract A. crassicarpa is one of the fastest-growing acacias for planting on degraded sites in the seasonally-dry tropics. It tolerates a range of soil types, particularly those of low fertility. It is a nitrogen-fixing tree that produces abundant natural root nodulation. It is fire resistant and competes favourably against weed species such as Imperata cylindrica. It has the potential to produce a dense hardwood that can be used in industrial pulp production, as sawn or round timber for construction or as fuelwood.

EFFECT OF SULPHUR TREATMENTS ON YIELD AND NITROGEN AND SULPHUR CONTENT OF ALFALFA GROWN ON SULPHUR-DEFICIENT AND SULPHUR-SUFFICIENT GREY WOODED SOILS

1961 ◽  
Vol 41 (4) ◽  
pp. 709-715 ◽  
Author(s):  
R. R. Cairns ◽  
R. B. Carson
Keyword(s):  
Nitrogen Content ◽  
Relative Abundance ◽  
Nitrogen Assimilation ◽  
Calcium Sulphate ◽  
Nitrogen Supply ◽  
Physiological Functions ◽  
Root Nodulation ◽  
Main Effect ◽  
Sulphate Sulphur ◽  
Elemental Form

Sulphur applied in the elemental form, or as sodium or calcium sulphate, on Grey Wooded soils, increased yields of alfalfa on sulphur-deficient Loon River loam, but not on sulphur-sufficient Garrick loam. The quantity of sulphate-sulphur was extremely low in the alfalfa grown on untreated Loon River loam and increased markedly as a result of the application of sulphur to the soil. Although herbage from untreated areas of the sulphur-deficient soil contained a slightly higher per cent nitrogen in 1955 than that grown on the sulphur-sufficient soil, sulphur treatment increased nitrogen content and yield of nitrogen on the sulphur-deficient soil. The relative abundance of nitrogen in the herbage grown on the check areas of the deficient soil suggests that the main effect of sulphur was not on root nodulation or nitrogen supply, but rather on nitrogen assimilation and other physiological functions of the sulphur-containing compounds within the plant.

Changes in phytohormone levels following inoculation of two soybean lines differing in nodulation

2002 ◽  
Vol 29 (8) ◽  
pp. 965 ◽  
Author(s):  
Asghari Bano ◽  
James E. Harper ◽  
Robert M. Auge ◽  
Dawn S. Neuman
Keyword(s):  
Glycine Max ◽  
Xylem Sap ◽  
Zeatin Riboside ◽  
Phloem Sap ◽  
Root Nodulation ◽  
Hormone Transport ◽  
Glycine Max L ◽  
Bradyrhizobium Inoculation

Changes in the concentration of free and conjugated ABA, zeatin riboside (ZR), and IAA in response to Bradyrhizobium inoculation and subsequent nodulation were monitored in xylem sap, phloem sap, and leaves of soybean [Glycine max (L.) Merr. cv. Williams 82] and its hypernodulating mutant, NOD1-3. In this study, pre-inoculation concentrations of phloem and xylem sap ABA and ZR were lower in NOD1-3 than in Williams 82, a difference that was accentuated in phloem after inoculation. The concentration of xylem ABA increased within 6�h of inoculation, while the concentration of phloem and leaf ABA did not change until 48-96 h after inoculation. Leaf uptake of [3H]ABA and distribution to phloem sap was greater in Williams 82 than in NOD1-3 during 48-72�h after inoculation. Inoculation resulted in similar increases in phloem and leaf IAA concentrations in both cultivars. While inoculation increased xylem sap ZR in both lines, the concentration of ZR increased much earlier in NOD1-3. Of particular interest is that ratios between hormones were altered during nodulation. Leaf and phloem ABA/IAA ratios were higher in Williams 82 than in the hypernod mutant, while the phloem IAA/ZR was greater from inoculation until nodulation in the NOD1-3 hypernod mutant. The xylem ABA/ZR ratio, as well as phloem ABA/ZR ratio, decreased in Williams 82 following inoculation, and leaf ABA concentration was elevated. The most noteworthy results of this study, therefore, came from an examination of the ratios between hormones in xylem and phloem sap, and the demonstration that hormone transport may play an important role in autoregulation of root nodulation.

scholarly journals A New Gene that Controls Root Nodulation in Chickpea

Crop Science ◽  
1998 ◽  
Vol 38 (2) ◽  
pp. 360-362 ◽  
Author(s):  
Onkar Singh ◽  
O. P. Rupela
Keyword(s):  
Root Nodulation ◽  
New Gene

scholarly journals Differences between the effects of insecticidal seed and foliar treatments on pea leaf weevils (Sitona lineatus L.) in the field pea (Pisum sativum L.)

2010 ◽  
Vol 46 (No. 1) ◽  
pp. 25-33 ◽  
Author(s):  
M. Seidenglanz ◽  
J. Poslušná ◽  
I. Smékalová ◽  
J. Rotrekl ◽  
P. Kolařík
Keyword(s):  
Pisum Sativum ◽  
Foliar Application ◽  
Field Pea ◽  
Seed Treatments ◽  
Real Effect ◽  
Root Nodulation ◽  
Pisum Sativum L ◽  
Lambda Cyhalothrin ◽  
Higher Doses

Tested seed treatments (two doses of thiamethoxam, thiamethoxam + fludioxonil + metalaxyl-M; two doses of clothianidin + beta-cyfluthrin) showed high effects on pea leaf weevils (Sitona lineatus L.) which approved relatively long-lasting and sufficient protection of several bottom nodes of stipules simultaneously. The effects of foliar treatments (chlorpyrifos + cypermethrin; acetamiprid, lambda-cyhalothrin) sometimes were evident only on the node which was determined as the youngest node at the time of spraying. The effects of the compared seed and foliar treatments on the reduction of S. lineauts larvae numbers on roots were not proven as positive. It is possible to conclude that the foliar application had no real effect in this sense at all. However, positive significant effects of thiamethoxam and clothianidin + beta-cyfluthrin on root nodulation in general were recorded. Especially higher doses of the seed treatments increased overall nodulation from 43% till 363%.  

scholarly journals Novel Plant-Microbe Rhizosphere Interaction Involving Streptomyces lydicus WYEC108 and the Pea Plant (Pisum sativum)

2002 ◽  
Vol 68 (5) ◽  
pp. 2161-2171 ◽  
Author(s):  
Ranjeet K. Tokala ◽  
Janice L. Strap ◽  
Carina M. Jung ◽  
Don L. Crawford ◽  
Michelle Hamby Salove ◽  
...  
Keyword(s):  
Pisum Sativum ◽  
Root Nodules ◽  
Root Nodulation ◽  
Plant Microbe Interaction ◽  
Naturally Occurring ◽  
Plant Growth Promoting ◽  
Cell Layers ◽  
Soil Actinomycete ◽  
Average Size ◽  
Northern Idaho

ABSTRACT A previously undescribed plant-microbe interaction between a root-colonizing Streptomyces species, S. lydicus WYEC108, and the legume Pisum sativum is described. The interaction is potentially of great importance to the health and growth in nature of this nodulating legume. The root-colonizing soil actinomycete S. lydicus WYEC108 influences pea root nodulation by increasing root nodulation frequency, possibly at the level of infection by Rhizobium spp. S. lydicus also colonizes and then sporulates within the surface cell layers of the nodules. Colonization leads to an increase in the average size of the nodules that form and improves the vigor of bacteroids within the nodules by enhancing nodular assimilation of iron and possibly other soil nutrients. Bacteroid accumulation of the carbon storage polymer, poly-β-hydroxybutyrate, is reduced in colonized nodules. Root nodules of peas taken from agricultural fields in the Palouse hills of northern Idaho were also found to be colonized by actinomycete hyphae. We hypothesize that root and nodule colonization is one of several mechanisms by which Streptomyces acts as a naturally occurring plant growth-promoting bacterium in pea and possibly other leguminous plants.

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