Browsing by Subject "Halophytes"
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Item Ionic balance and transpiration rates in Atriplex halimus L(Texas Tech University, 1973-12) Miller, Don RayMissingItem Restoration of Brine Water Impacted Soils Using Halophytes and Soil Disturbances in West TexasBurris, Kye R.; Scott, Cody B; Ward, James W; Negovetich, Nicholas JContamination from brine water alters soil chemistry and capability. This includes lower infiltration rates and a change in the amount of essential nutrients available for plant growth. This study took place on a 15.7 hectare “kill zone”. Six halophyte species were planted to evaluate their ability to grow and remediate salt at the site. The species in this study include Inland saltgrass (Distichlis spicatas), Alkali sacaton (Sporobolus airoides), Common and Giant Bermuda grass (Cynodon dactylon), Giant sacaton (Sporobolus wrightii), and Four-winged saltbush (Atriplex canescens Soil compaction exceeded 2068 kPa at the surface. Ripping and furrowing transects were established to improve soil structure. Alkali sacaton exhibited the lowest mortality rates. Four-winged saltbush produced the highest amount of biomass. Soil compaction was generally not affected my treatments or plant type. All species except for Inland saltgrass showed a moderate ability to survive.Item Salinity Effects on Growth and Fine Structure of Atriplex Halimus 1(Texas Tech University, 1974-05) Kelley, David BryanAtriplex halimus L. plants were grown in nutrient culture solutions of full-strength Hoagland's, and fullstrength Hoagland's supplemented with either 0.174 M NaCl or 0.345 M NaCl. Observations were made on growth habit, net growth, and leaf cell ultrastructure of plants from the various treatments. Plants grown under control conditions (full-strength Hoagland's with no supplemental salt) had an erect habit with no lateral branching, but had a reduced net growth in comparison to plants in either of the salt treatments. Plants in the 0.174 M NaCl treatment were relatively erect (some recumbency was noted) and exhibited much better growth than either the control treatment or the high-salt (0.345 M NaCl) treatment. This is an indication of the plant's need for sodium chloride in the medium as either a nutrient or an osmoticum, and leads to the classification of A. halimus as a halophyte. Plants grown in the high-salt treatment showed a marked recumbency and a reduction in growth, but nevertheless showed a better net growth than plants in the control treatment. The fine structure of the leaf cells is correlated to salinity treatments. Plants grown in high-salt treatments showed swelling of organelles (chloroplasts and mitochondria) and other structural differences. The hair cells, which showed little ultrastructural response to high-salinity treatments, were characterized by unique ultrastructural features directly related to salinity tolerance.