Salinity effects on growth and fine structure of Atriplex halimus 1

dc.creatorKelley, David Bryan
dc.date.available2011-02-18T23:51:35Z
dc.date.issued1974-05
dc.description.abstractAtriplex 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.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2346/20673en_US
dc.language.isoeng
dc.publisherTexas Tech Universityen_US
dc.rights.availabilityUnrestricted.
dc.subjectPlants -- Effect of salt onen_US
dc.subjectSalts inen_US
dc.subjectSoilsen_US
dc.subjectHalophytesen_US
dc.subjectAtriplexen_US
dc.titleSalinity effects on growth and fine structure of Atriplex halimus 1
dc.typeThesis
thesis.degree.departmentBotany
thesis.degree.grantorTexas Tech University
thesis.degree.levelMasters
thesis.degree.nameM.S.

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