Seed manganese affects the early growth of lupins in manganese-deficient conditions

1994 ◽  
Vol 45 (7) ◽  
pp. 1469 ◽  
Author(s):  
J Crosbie ◽  
NE Longnecker ◽  
AD Robson
Keyword(s):  
Maximum Growth ◽  
Early Growth ◽  
Crop Establishment ◽  
Final Weight ◽  
Lupin Seeds ◽  
Seed Manganese ◽  
Shoot Weight ◽  
Mn Concentration ◽  
Western Australian ◽  
Mn Concentrations

Poor crop establishment and split seed associated with manganese (Mn) deficiency are major problems in the production of narrow-leafed lupins (Lupinus angustifolius L.) in Western Australia. A survey of Western Australian seed producers indicated that Mn concentrations in lupin seeds ranged from 8 to 62 mg kg-1, with the majority of the seed containing less than 20 mg kg-1. We studied seedling growth of lupins (cultivars Gungurru and Danja) in nutrient solution, from seed with Mn concentrations ranging from 8 (Seed8) to 223 (Seed 223) mg kg-1. Without added Mn, the final weight of plants grown from Seed8 was 39% for shoots and 30% for roots, compared to maximum growth (Seed62). With adequate external Mn supply, there was no effect of seed Mn on growth of plants grown from undamaged seedlings. Shoot weight of Gungurru lupins 42 days after imbibing increased with increasing seed Mn concentration up to about 55 mg kg-1 when grown without added Mn. Growth of Danja plants increased similarly with increasing seed Mn concentration.

Improvement of carrot crop establishment by combining seed treatments with increased seed-bed moisture availability

1990 ◽  
Vol 115 (1) ◽  
pp. 75-81 ◽  
Author(s):  
W. E. Finch-Savage ◽  
W. G. Pill
Keyword(s):  
Soil Moisture ◽  
Surface Structure ◽  
Untreated Control ◽  
Seedling Emergence ◽  
Seed Treatments ◽  
Crop Establishment ◽  
Shoot Weight ◽  
Germinating Seeds ◽  
Mean Time ◽  
Fluid Drilling

SUMMARYIn studies of carrots sown on three dates at Wellesbourne in 1986, mean time to seedling emergence and spread of times to seedling emergence of untreated and fluid-drilled seeds increased as seed-bed moisture at sowing decreased. These differences were not observed with irrigation before sowing.Osmotic priming increased the percentage of seeds with emerged radicles at the time of fluid drilling from 17% in the untreated control to 56%. Irrespective of seed-bed moisture, time to emergence was shorter from primed germinating seeds than from germinating seeds, both treatments giving earlier seedling emergence than untreated seeds. Seedling shoot weight was greater from treated than from untreated seeds.Seed-bed characteristics on unirrigated plots had no effect on seedling emergence when soil moisture was adequate but, where soil moisture was limiting, rolling the seed bed to increase capillarity resulted in 79% emergence compared with the 67% average from seed beds that were not rolled. Application of a soil conditioner to stabilize the seed-bed surface structure generally improved emergence when rain fell soon after sowing. The results suggested that a combination of seed-bed and seed treatments can significantly improve the predictability of crop establishment of carrots on different dates.

scholarly journals Manganese concentration in plants of the protected natural resource, Kosmaj, in Serbia

2015 ◽  
Vol 67 (1) ◽  
pp. 251-255 ◽  
Author(s):  
Dragica Stankovic ◽  
Vladan Ivetic ◽  
Mirjana Ocokoljic ◽  
Dusan Jokanovic ◽  
Rodoljub Oljaca ◽  
...  
Keyword(s):  
Plant Species ◽  
Natural Resource ◽  
Vegetation Period ◽  
Manganese Concentration ◽  
Vegetative Organs ◽  
Wide Range ◽  
Mn Concentration ◽  
Mn Concentrations

This study was focused on determining the manganese (Mn) concentration in vegetative organs of 10 plant species (8 woody and 2 herbaceous), from four sites in the protected natural resource Kosmaj. The concentration of Mn was analyzed at the beginning of the vegetation period, during a two-year period (2012-2013). The results indicate a wide range of Mn concentrations, depending on site and plant species.

Accelerating growth of silver fir seedlings under controlled environments

1987 ◽  
Vol 17 (8) ◽  
pp. 835-839
Author(s):  
Sunil Puri ◽  
M. A. Tak
Keyword(s):  
Positive Response ◽  
Maximum Growth ◽  
Day Length ◽  
Silver Fir ◽  
N Application ◽  
Nitrogen Levels ◽  
Shoot Ratio ◽  
Percent Increase ◽  
Controlled Environments ◽  
Shoot Weight

Studies on Abiespindrow seedlings were conducted to accelerate and attain maximum growth under controlled environmental conditions. Seedlings of age 7, 19, and 31 months collected from Manali, Shilaru, and Kashmir provenances were treated for 90 days with four photoperiods (natural day length and 12, 18, and 24 h light) and two nitrogen levels (1.0 and 1.5 g/seedling). A positive response to light and N application was observed. Initially, light had no effect on roots (up to 45 days) but later on a significant increase in length and weight of roots was observed. Root to shoot ratio decreased with light but increased with N applied to seedlings. The interaction among photoperiod, N, provenance, and age, calculated from analysis of variance, was significant for root length and root and shoot weight at 45 and 90 days. The maximum percent increase in growth and biomass was observed in the 1-0 age from the Kashmir provenance.

scholarly journals Influence of soil pH, rainfall, dosage, and application timing of herbicide Merlin 750 WG (isoxaflutole) on phytotoxicity level in maize (Zea mays L.)

2011 ◽  
Vol 50 (No. 2) ◽  
pp. 88-94 ◽  
Author(s):  
J. Soukup ◽  
M. Jursík ◽  
P. Hamouz ◽  
J. Holec ◽  
J. Krupka
Keyword(s):  
Soil Ph ◽  
Weight Reduction ◽  
Zea Mays L ◽  
Field Studies ◽  
Field Trials ◽  
Early Growth ◽  
Application Timing ◽  
Pot Trials ◽  
Phytotoxic Effect ◽  
Shoot Weight

Pot trials and field studies were carried out to describe the influence of soil pH and rainfall on the phytotoxic effect of the herbicide Merlin 750 WG (isoxaflutole) in maize. Symptoms as bleaching, and root and shoot weight reduction in early growth of maize were found. In pot trials, a statistically significant crop injury in early growth of maize was found only at the herbicide dose of 100 and 130 g/ha followed by 30 mm precipitation directly after herbicide application in soils with pH 6.5 and 7.2. Bleaching and significant weight reduction of maize up to growth stage BBCH 13 were observed in field trials at treatments with early post-emergence application of Merlin and 20 mm precipitations. Bleaching symptoms recovered up to BBCH 19. Significant differences were found in maize shoot weight and cob yield between treatments with and without watering (20 mm irrigation), and between pre- and post-emergence application of Merlin under field conditions. No significant differences were found between herbicide doses tested.

Manganese dynamics in decomposing needle and leaf litter — a synthesis

2013 ◽  
Vol 43 (12) ◽  
pp. 1127-1136 ◽  
Author(s):  
Björn Berg ◽  
Björn Erhagen ◽  
Maj-Britt Johansson ◽  
Lars Vesterdal ◽  
Mikaeel Faituri ◽  
...  
Keyword(s):  
Mass Loss ◽  
Norway Spruce ◽  
Scots Pine ◽  
Deciduous Species ◽  
Limit Values ◽  
Litter Mass ◽  
Litter Mass Loss ◽  
Species Groups ◽  
Mn Concentration ◽  
Mn Concentrations

The aim of the present synthesis paper was to determine whether concentration changes and net release of manganese (Mn), as related to accumulated litter mass loss, are related to initial Mn concentration, mean annual temperature (MAT), mean annual precipitation (MAP), and tree genus or species. We also examined whether limit values for decomposition are related to initial litter Mn concentration, MAT, and MAP. We compiled 84 foliar litter decomposition studies, conducted mainly in boreal and temperate forest ecosystems, for which Mn dynamics had been well documented. Manganese concentration and amount were related to accumulated litter mass loss at each sampling time for each single study, as well as for (i) all studies combined (n = 748) and (ii) for species groups viz. Norway spruce (Picea abies (L.) Karst.) (n = 284), pine (Pinus) species (n = 330), and deciduous species (n = 214). The changes in Mn concentration with accumulated mass loss followed quadratic functions showing significantly higher Mn concentrations for Norway spruce vs. Scots pine (Pinus sylvestris L.) (p < 0.0001) and vs. deciduous species (p < 0.01), as well as significantly higher for deciduous species vs. Scots pine (p < 0.0001). Manganese release rates were different among the three species groups (p < 0.001). Still, rates were related to initial Mn concentrations (p < 0.001) for all litter types combined and for the three species groups. Norway spruce released Mn more slowly than pine and deciduous species. Rates were related to climatic factors for litter of Norway spruce and deciduous species. Limit values for all litter and for pine species separately were related to Mn (p < 0.001) and MAT (p < 0.001). For Norway spruce, limit values were related to MAT (p < 0.001) and MAP (p < 0.01). It appears that Norway spruce litter retains Mn more strongly in the litter structure, producing humus richer in Mn than does litter of pine and deciduous species.

scholarly journals Study on the Relationship between Manganese Concentrations in Rural Drinking Water and Incidence and Mortality Caused by Cancer in Huai’an City

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Qin Zhang ◽  
Enchun Pan ◽  
Linfei Liu ◽  
Wei Hu ◽  
Yuan He ◽  
...  
Keyword(s):  
Drinking Water ◽  
Cancer Incidence ◽  
Shallow Groundwater ◽  
High Flow ◽  
Low Flow ◽  
Deep Groundwater ◽  
Incidence And Mortality ◽  
The Relationship ◽  
Mn Concentration ◽  
Mn Concentrations

Background. Cancer is a significant disease burden in the world. Many studies showed that heavy metals or their compounds had connection with cancer. But the data conflicting about the relationship of manganese (Mn) to cancer are not enough. In this paper, the relationship was discussed between Mn concentrations in drinking water for rural residents and incidence and mortality caused by malignant tumors in Huai’an city.Methods. A total of 158 water samples from 28 villages of 14 towns were, respectively, collected during periods of high flow and low flow in 3 counties of Huai’an city, along Chinese Huai’he River. The samples of deep groundwater, shallow groundwater, and surface water were simultaneously collected in all selected villages. Mn concentrations in all water samples were determined by inductively coupled plasma-mass spectrometry (ICP-MS 7500a). The correlation analysis was used to study the relationship between the Mn concentration and cancer incidence and mortality.Results. Mn concentrations detectable rate was 100% in all water samples. The mean concentration was 452.32 μg/L ± 507.76 μg/L. There was significant difference between the high flow period and low flow period (t=-5.23,P<0.05) and also among deep groundwater, shallow groundwater, and surface water (F=5.02,P<0.05). The ratio of superscale of Mn was 75.32%. There was significant difference of Mn level between samples in the high flow period and low flow period (χ2=45.62, P<0.05) and also among deep groundwater, shallow groundwater, and surface water (χ2=10.66,P<0.05). And also we found that, during the low flow period, Mn concentration has positive correlation with cancer incidence and mortality; for a 1 μg/L increase in Mn concentration, there was a corresponding increase of 0.45/100000 new cancer cases and 0.35/100000 cancer deaths (P<0.05).Conclusions. In Huai’an city, the mean concentration of Mn in drinking water was very high. Mn concentration correlated with cancer incidence and mortality.

Economies in the use of animal by-products in poultry rations: II. Vitamin and amino-acid provision for laying hens

1954 ◽  
Vol 44 (3) ◽  
pp. 340-354 ◽  
Author(s):  
K. J. Carpenter ◽  
J. Duckworth ◽  
G. M. Ellinger
Keyword(s):  
Amino Acid ◽  
Egg Production ◽  
Laying Hens ◽  
Early Growth ◽  
Limited Access ◽  
Protein Factor ◽  
Laying Performance ◽  
Final Weight ◽  
By Products ◽  
Stimulation Of

1. Birds fed on rations devoid of animal byproducts from hatching until 18 months of age were equal in laying performance and health to those that had received animal supplements.2. The stimulation of early growth by feeding aureomycin did not affect the final weight of pullets, their egg production or the incidence of broodiness.3. The ‘animal protein factor(s)’ was of limited importance for egg production. There was a suggestive indication of an effect of a deficiency of the factor(s) when birds on an all-plant ration had been laying for 6 months without access to their droppings. Limited access to ‘unfermented’ droppings, which provided the only dietary source of the factor(s) during both rearing and laying periods, was sufficient to meet the need of the birds for sustained egg production.

scholarly journals Processing Variants in Medium-Mn Steels

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 771 ◽  
Author(s):  
John Speer ◽  
Radhakanta Rana ◽  
David Matlock ◽  
Alexandra Glover ◽  
Grant Thomas ◽  
...  
Keyword(s):  
Hot Stamping ◽  
Continuous Annealing ◽  
Cold Forming ◽  
Quenching And Partitioning ◽  
Wide Range ◽  
Quench Temperature ◽  
Mn Concentration ◽  
Step Quenching ◽  
Very High ◽  
Mn Concentrations

This paper highlights some recent efforts to extend the use of medium-Mn steels for applications other than intercritically batch-annealed steels with exceptional ductility (and strengths in the range of about 1000 MPa). These steels are shown to enable a range of promising properties. In hot-stamping application concepts, elevated Mn concentration helps to stabilize austenite and to provide a range of attractive property combinations, and also reduces the processing temperatures and likely eliminates the need for press quenching. The “double soaking” concept also provides a wide range of attractive mechanical property combinations that may be applicable in cold-forming applications, and could be implemented in continuous annealing and/or continuous galvanizing processes where Zn-coating would typically represent an additional austempering step. Quenching and partitioning of steels with elevated Mn concentrations have exhibited very high strengths, with attractive tensile ductility; and medium-Mn steels have been successfully designed for quenching and partitioning using room temperature as the quench temperature, thereby effectively decoupling the quenching and partitioning steps.

scholarly journals Changes in the ultrastructure of soybean cultivars in response to manganese supply in solution culture

2010 ◽  
Vol 67 (3) ◽  
pp. 287-294 ◽  
Author(s):  
José Lavres Junior ◽  
André Rodrigues Reis ◽  
Mônica Lanzoni Rossi ◽  
Cleusa Pereira Cabral ◽  
Neusa de Lima Nogueira ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Growth Parameters ◽  
Solution Culture ◽  
Ultrastructural Changes ◽  
Mn Toxicity ◽  
Mn Deficiency ◽  
Glycine Max L ◽  
Mn Concentration ◽  
Mn Concentrations ◽  
Stomata Number

The deleterious effects of Mn stress on many species have been studied, mainly concerning biochemical, physiological and growth parameters of plants. However, there are few studies relating the anatomical and ultrastructural changes in response to manganese (Mn) nutritional disorders, This study examined the leaf ultrastructure of Mn-inefficient (IAC-15, Santa Rosa) and Mn-efficient (IAC-Foscarin 31) soybean (Glycine max L.) genotypes in response to three rates of Mn (0.5, 2 and 200 µmol L-1) in the nutrient solution. Symptoms of Mn deficiency developed 12 days after transplanting in IAC-15 and Santa Rosa, followed by IAC-Foscarin 31 on the 15th day. Only IAC-15 and Santa Rosa leaves showed symptoms of Mn toxicity. The Mn concentration in leaves ranged from 8.6 (deficiency) to 886.3 mg kg-1 d.w. (toxicity). There were no changes either in stomata length or stomata number per unit of leaf surface. Cytoplasm disorganization was observed in IAC-15 under Mn-excess. In this case, the cytoplasm was amorphous, densely stained and extensively disorganized, with increased vacuolation. Mn effects were not found in mitochondria and nucleus in any of the genotypes tested. Under all Mn concentrations, many lipid globules were observed in the IAC15 chloroplasts. There was an increase in the number of plastids as well as in the size of starch grains within IAC-Foscarin 31 chloroplasts as Mn concentration in the nutrient solution increased. Genotypes had marked differences in the ultrastructure organization, mainly in leaf chloroplasts grown under conditions of both Mn deficiency and toxicity (the most sensitive genotype was IAC-15).

Leaching Characteristics of Manganese and Iron from Artificial Soil

2012 ◽  
Vol 518-523 ◽  
pp. 2568-2571
Author(s):  
Hong Ling Zhang ◽  
Li Na Sun ◽  
Tie Heng Sun
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Sewage Sludge ◽  
Artificial Soil ◽  
Amorpha Fruticosa ◽  
Leaching Characteristics ◽  
Leaching Experiment ◽  
Fe And Mn ◽  
Mn Concentration ◽  
Mn Concentrations

A leaching experiment was carried out over a period of 90 days to determine the manganese (Mn) and iron (Fe) leaching characteristics from artificial soils composed of sewage sludge and fly ash. The leachates of artificial soils were collected every 15 days and the concentration of manganese and iron in leachates of the artificial soil was measured. Results showed that the concentration of Fe and Mn in leachates of artificial soils got to a stable level by the end of the experiment. Moreover, plant Robina pseudoacacia and Amorpha fruticosa had different effect on the leachate Fe and Mn concentration. Robina pseudoacacia resulted in higher leachate Fe concentration, while Amorpha fruticosa resulted in higher Mn concentration. However, the leachate Fe and Mn concentrations from artificial soils was high, and it will also be transported to the surface and ground water. Therefore, some measures should be taken to reduce the concentration of heavy metals in the leachates before these artificial soils being applied on the ecological rehabilitation in mine spoil areas.

Sign in / Sign up

Export Citation Format

Share Document