Spatial distributions and net deposition rates of Fe, Mn and Zn in the elongating leaves of wheat under saline soil conditions

2000 ◽  
Vol 13 (5) ◽  
Author(s):  
Yuncai Hu ◽  
Sabine von Tucher ◽  
Urs Schmidhalter
Keyword(s):  
Saline Soil ◽  
Soil Conditions ◽  
Spatial Distributions ◽  
Deposition Rates

Spatial distributions of inorganic ions and sugars contributing to osmotic adjustment in the elongating wheat leaf under saline soil conditions

1998 ◽  
Vol 25 (5) ◽  
pp. 591 ◽  
Author(s):  
Yuncai Hu ◽  
Urs Schmidhalter
Keyword(s):  
Osmotic Adjustment ◽  
Saline Soil ◽  
Inorganic Ions ◽  
Triticum Aestivum L ◽  
Soil Conditions ◽  
Spatial Distributions ◽  
Elongation Zone ◽  
Leaf Base ◽  
Deposition Rates ◽  
Wheat Leaf

In this study, we quantified the spatial distributions of inorganic ions and sugars contributing to osmotic adjustment and their net deposition rates in the elongating and mature zones of leaf 4 of the main stem of spring wheat (Triticum aestivum L. cv. Lona) during its linear growth phase under saline soil conditions. Plants were grown in growth chambers in soil irrigated/treated with nutrient solution containing either no added or 120 mM NaCl. The sampling was conducted on the 3rd day after emergence of leaf 4 at 3 and 13 h into the 16 h photoperiod. The patterns of spatial distributions of total osmoticum, cation, anion and sugar contents (mmol kg-1 H2O) were distinct and were affected by salinity. The total osmoticum content in the region between 0 and 60 mm above the leaf base differed between the two harvests at 120 mM NaCl. Net deposition rates of total osmotica, cations, anions, and sugars (mmol kg-1 H2O h-1) in both treatments increased from the base of the leaf to the most actively elongating location and then decreased near the end of the elongation zone. Contributions of cations, anions, and sugars to osmotic adjustment varied with distance from the leaf base, and were about 21–30, 15–21, and 13%, respectively, in the elongation zone. We suggest that the accumulation of solutes under saline conditions occurs both by increasing the net deposition rate of osmotica and by reducing growth.

Spatial distributions and net deposition rates of Fe, Mn and Zn in the elongating leaves of wheat under saline soil conditions

2000 ◽  
Vol 27 (1) ◽  
pp. 53 ◽  
Author(s):  
Yuncai Hu ◽  
Sabine von Tucher ◽  
Urs Schmidhalter
Keyword(s):  
Linear Growth ◽  
Saline Soil ◽  
Leaf Growth ◽  
Distribution Patterns ◽  
Triticum Aestivum L ◽  
Soil Conditions ◽  
Spatial Distributions ◽  
Elongation Zone ◽  
Deposition Rates ◽  
Silty Loam

In this study, we quantified the spatial distributions of Fe, Mn and Zn and their net deposition rates in the elongating and mature zones of leaf 4 on the main stem of spring wheat (Triticum aestivum L.) on a millimetre scale during its linear growth phase under saline soil conditions. Plants were grown in an illitic-chloritic silty loam with 0 and 120 mМ NaCl in growth chambers. The sampling was conducted on the 3rd day after leaf 4 emerged during the photoperiod. The patterns of spatial distributions of Fe, Mn and Zn concentrations (mmol kg–1 FW) in the growing leaves were distinct. Salinity affected the distri-bution pattern of Fe concentration on the FW basis, whereas it did not affect those of the Zn and Mn. The distribution patterns of Fe and Mn differed from those for N, P, K, Ca and Mg found in a previous study, whereas the distribution pattern of Zn was similar to those of Mg, P and N. The spatial distribution of the net deposition rates (mmol kg–1 FW h–1) in both treatments demonstrated the strongest sink for the micronutrients in the elongation zone, and their net deposition rates were enhanced by 120 mМ NaCl at the middle of the elongation zone. From the results, we conclude that the inhibition of leaf growth of wheat is probably not due to the effect of salinity on Fe, Mn and Zn in leaves.

Effect of Nano, Bio and Organic Fertilizers on Some Soil Physical Properties and Soybean Productivity in Saline Soil

2021 ◽  
pp. 44-57
Author(s):  
Kh. A. Shaban ◽  
M. A. Esmaeil ◽  
A. K. Abdel Fattah ◽  
Kh. A. Faroh
Keyword(s):  
Humic Acid ◽  
Hydraulic Conductivity ◽  
Physical Properties ◽  
Bulk Density ◽  
Saline Soil ◽  
Field Capacity ◽  
Soil Physical Properties ◽  
Organic Fertilizers ◽  
Mineral Fertilizers ◽  
Soil Conditions

A field experiment was carried out at Khaled Ibn El-waleed village, Sahl El-Hussinia, El-Sharkia Governorate, Egypt, during two summer seasons 2019 and 2020 to study the effect of NPK nanofertilizers, biofertilizers and humic acid combined with or without mineral fertilizers different at rates on some soil physical properties and soybean productivity and quality under saline soil conditions. The treatments consisted of: NPK-chitosan, NPK-Ca, humic acid, biofertilzer and control (mineral NPK only). In both seasons, the experiment was carried out in a split plot design with three replicates. The results indicated a significant increase in the soybean yield parameters as compared to control. There was also a significant increase in dry and water stable aggregates in all treatments as compared to control. The treatment NPK-Chitosan was the best in improving dry and stable aggregates. Also, hydraulic conductivity and total porosity values were significantly increased in all treatments due to increase in soil aggregation and porosity that led to increase in values of hydraulic conductivity. Values of bulk density were decreased, the lowest values of bulk density were found in NPK-chitosan treatment as a result of the high concentration of organic matter resulted from NPK-chitosan is much lighter in weight than the mineral fraction in soils. Accordingly, the increase in the organic fraction decreases the total weight and bulk density of the soil. Concerning soil moisture constants, all treatments significantly increased field capacity and available water compared to control. This increase was due to improvement of the soil aggregates and pores spaces which allowed the free movement of water within the soil thereby, increasing the moisture content at field capacity.

scholarly journals Spatial Distributions of Potassium, Solutes, and Their Deposition Rates in the Growth Zone of the Primary Corn Root

1986 ◽  
Vol 82 (3) ◽  
pp. 853-858 ◽  
Author(s):  
Wendy Kuhn Silk ◽  
Theodore C. Hsiao ◽  
Ulrike Diedenhofen ◽  
Christina Matson
Keyword(s):  
Growth Zone ◽  
Spatial Distributions ◽  
Deposition Rates ◽  
Corn Root

The Process of Germination in Australian Species

1999 ◽  
Vol 47 (4) ◽  
pp. 475 ◽  
Author(s):  
David T. Bell
Keyword(s):  
Seed Coat ◽  
Saline Soil ◽  
Environmental Parameters ◽  
Water Soluble ◽  
Soil Conditions ◽  
Light Sensing ◽  
Australian Species ◽  
Biochemical Sensing ◽  
Seed Coats ◽  
Soluble Components

Australian species germinate under the combination of environmental conditions where the potential for survival is enhanced. Most species also have dormancy mechanisms that prevent all seeds from germinating in any particular rainfall event. Immaturity of the embryo prevents some species from germinating until environmental parameters change to more favourable conditions. Seed-coat inhibitors may also delay germination, with some seed requiring ingestion and dispersal by animals or a series of rainfall cycles to facilitate germination. Adaptations to fire include germination mechanisms facilitated by impervious seed coats, seed-coat inhibitors and biochemical sensing of water-soluble components of smoke and the high soil nitrate levels found following the burning of vegetation. Germination is generally limited under saline soil conditions until rainfall dilutes concentrations to near-zero water potentials. Australian species tend to germinate under temperatures that approximate the rainfall season in their native habitat. Light sensing by Australian species ensures germination takes place only near the surface for some species or only under complete burial conditions in others. More recent research has emphasised the interaction of multiple and sequential cues to relieve dormancy and initiate germination. Knowledge of germination mechanisms provides a basis for better land management, enriched conservation, improved rehabilitation and advanced horticulture, forestry and farming practices.

Influence of municipal solid waste (MSW) compost on hormonal status and biomass partitioning in two forage species growing under saline soil conditions

2014 ◽  
Vol 64 ◽  
pp. 142-150 ◽  
Author(s):  
Youssef Ouni ◽  
Alfonso Albacete ◽  
Elena Cantero ◽  
Abdelbasset Lakhdar ◽  
Chedly Abdelly ◽  
...  
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Saline Soil ◽  
Biomass Partitioning ◽  
Soil Conditions ◽  
Hormonal Status ◽  
Msw Compost ◽  
Forage Species
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