scholarly journals Nodulation Studies in Legumes III. The Effects of Delaying Inoculation on the Seedling Symbiosis of Barrel Medic, Medicago Tribuloides Desr.

1959 ◽  
Vol 12 (4) ◽  
pp. 427 ◽  
Author(s):  
PJ Dart ◽  
JS Pate
Keyword(s):  
Sand Culture ◽  
Nodule Bacteria ◽  
Barrel Medic ◽  
Ineffective Nodule

The technique of delayed inoculation with effective, ineffective, or mixtures of effective + ineffective nodule bacteria was used to study seedling symbiosis of barrel medic, M. tribuloides, in sand culture.

The presence of Rhizobium meliloti on pods of Medicago tribuloides

1965 ◽  
Vol 5 (17) ◽  
pp. 141
Author(s):  
J Brockwell
Keyword(s):  
Rhizobium Meliloti ◽  
Single Line ◽  
Nodule Bacteria ◽  
Barrel Medic

Pods of a single line of barrel medic (Medicago tribuloides Desr.) collected from the field were examined for the presence of Rhizobium meliloti. It was found that 99 per cent of pods carried 15 nodule bacteria or less. The ability of such low numbers of Rh. meliloti to promote nodulation of seedlings from sown pods is doubtful, and inoculation of pods may be necessary where soil populations of appropriate Rh. meliloti are low.

Selection and evaluation of root nodule bacteria for Dorycnium spp.

2005 ◽  
Vol 45 (3) ◽  
pp. 241 ◽  
Author(s):  
S. R. Davies ◽  
J. G. Howieson ◽  
R. J. Yates ◽  
P. A. Lane
Keyword(s):  
Dry Matter ◽  
Root Nodule ◽  
Field Conditions ◽  
Low Fertility ◽  
Sand Culture ◽  
Nodule Bacteria ◽  
Root Nodule Bacteria ◽  
Pasture Legumes ◽  
Matter Production ◽  
Perennial Legumes

Dorycnium spp. are perennial legumes that have the ability to produce a source of forage in low fertility soils under low rainfall conditions. The inoculation of Dorycnium spp. is currently with the commercial Lotus corniculatus inoculant SU343, which until now had not been trialed against a range of alternative inoculants for Dorycnium spp. A glasshouse trial in sterile sand culture was conducted with 3 species of Dorycnium spp. along with 6 important pasture legumes to evaluate nitrogen-fixing performance, and host and rhizobia interactions. Several inoculants were selected from this trial to undergo evaluation under Tasmanian field conditions. The dry matter production of Dorycnium spp. in the glasshouse and field indicated that SU343 is a suitable inoculant for this genus. A Tasmanian isolate (WSM2338) was identified as a complimentary strain for the inoculation of Dorycnium spp., however, negative interactions with important pasture legumes require further investigation.

Salinity Tolerance of Black Gram Cultivars During Germination and Early Seedling Growth

2018 ◽  
Vol 51 (3) ◽  
pp. 51-68 ◽  
Author(s):  
M.K. Hasan ◽  
M.S. Islam ◽  
M.R. Islam ◽  
H.N. Ismaan ◽  
A. El Sabagh
Keyword(s):  
Salt Stress ◽  
Salinity Tolerance ◽  
Seedling Growth ◽  
Negative Impact ◽  
Germination Rate ◽  
Dry Weight ◽  
Germination Percentage ◽  
Shoot Length ◽  
Sand Culture ◽  
Black Gram

Abstract A laboratory experiment regarding germination and seedling growth test was conducted with three black gram genotypes tested under three salinity levels (0, 75 and 150 mM), for 10 days, in sand culture within small plastic pot, to investigate the germination and seedling growth characteristics. Different germination traits of all black gram genotypes, like germination percentage (GP), germination rate (GR), coefficient of velocity of germination (CVG) greatly reduced, as well as mean germination time (MGT) increased with increasing salt stress. At high salt stress, BARI Mash-3 provided the highest GP reduction (28.58%), while the lowest was recorded (15.79% to control) in BARI Mash-1. Salinity have the negative impact on shoot and root lengths, fresh and dry weights. The highest (50.32% to control) and lowest reduction (36.39%) of shoot length were recorded in BARI Mash-2 and BARI Mash-1, respectively, under 150 mM NaCl saline conditions. There were significant reduction of root lengths, root fresh and dry weight, shoot length, shoot fresh and dry weight in all genotypes under saline condition. The genotypes were arranged as BARI Mash-1 > BARI Mash-3 > BARI Mash-2, with respect to salinity tolerance.

The Effect of Water Supply on the Growth of lzmir, Palotina and Amarelinho Tobaccos

1981 ◽  
Vol 11 (2) ◽  
Author(s):  
R. Comber
Keyword(s):  
Water Stress ◽  
Water Supply ◽  
Sand Culture ◽  
Effect Of Water

AbstractThe Oriental tobacco variety Izmir has been grown in sand culture in a greenhouse under various degrees of water stress. Plants given 400 cm

Genetics of symbiosis and nitrogen fixation in legumes

1969 ◽  
Vol 172 (1029) ◽  
pp. 417-437 ◽  
Keyword(s):  
Nitrogen Fixation ◽  
Bacterial Strain ◽  
Host Plants ◽  
Strain Differences ◽  
Homogeneous Material ◽  
Developmental Sequence ◽  
Bacterial Strains ◽  
Nodule Bacteria ◽  
Microbial Genetics ◽  
Nodular Tissue

Soon after the isolation of nodule bacteria in 1888, differences were recognized in the ability of bacterial strains to form nodules on particular host plants and in the nitrogen-fixing ability of the nodules so formed. These and other symbiotic heterogeneities were attributed, sometimes correctly, to bacterial strain differences, not then thought to be open to formal genetic analysis. The realization that the host plant was an essential component of this variability came only gradually, stimulated by observations of host varietal differences and by the demand for reliable and homogeneous material for experimental work. Only within the last two decades has host variability been studied by plant breeding, and bacterial strain differences by some of the methods of microbial genetics. This review, except for a brief reference to earlier work of some historic interest, will consider only genetic problems open to investigation by these methods. The developmental sequence in all legume nodules is broadly similar. The initial infection phases are followed by the induction of the nodule, the invasion of part of the nodular tissue and culminate in bacteroid formation and nitrogen fixation; the genetics of symbiosis will be considered in this context.

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