Osmotic Adjustment of Sea Hibiscus to the Increased Salinity in Wastewater

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Material Information

Title:
Osmotic Adjustment of Sea Hibiscus to the Increased Salinity in Wastewater
Physical Description:
1 online resource (64 p.)
Language:
english
Creator:
Wajsbrot, Charles, Sr
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Doctorate ( Ph.D.)
Degree Grantor:
University of Florida
Degree Disciplines:
Horticultural Sciences, Environmental Horticulture
Committee Chair:
MOORE,KIMBERLY ANNE
Committee Co-Chair:
FITZPATRICK,GEORGE E
Committee Members:
DAROUB,SAMIRA H
BROSCHAT,TIMOTHY K
ELLIOTT,MONICA LYNN

Subjects

Subjects / Keywords:
osmotic-adjustment -- proline
Environmental Horticulture -- Dissertations, Academic -- UF
Genre:
Horticultural Sciences thesis, Ph.D.
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract:
The overall hypothesis for this work was to test if sea hibiscus (Hibiscus tiliaceus L.) could osmotically adjust to the increased salinity in reclaimed waste water (RWW) and reduce the concentrations of potassium (K) and sodium (Na) in RWW. To test this hypothesis, three objectives were tested. The first objective was to determine the salinity (electrical conductivity –EC) level that resulted in 33% death rate of sea hibiscus. Sea hibiscus were successfully grown in solutions with an EC up to 4.2 dS/m, but died when EC was higher than 4.2 dS/m. Plants grown in solutions with an EC of 0, 2.1 or 4.2 showed a drop in leaf water potential in the first 24 h. After 24 h, leaf water potential was similar in these treatments but the leaf water potential of plants grown in solutions with an EC greater than 4.2 dS/m continued to decrease over time. The second objective was to monitor changes in leaf proline concentrations (an osmotic adjustment) in sea hibiscus when grown in RWW. Proline concentrations in  sea hibiscus leaves increased as water potential decreased in response to changes in water status. After plants had adjusted to the new water status, proline concentrations decreased. Our third objective was to determine the change in Na and K concentrations in the root solution of sea hibiscus grown in hydroponic solutions containing RWW. Sea 12 hibiscus plants grown in a RWW/hydroponic solution appeared to remove K from the solution during the first three weeks, but appeared to add Na to the solution each week. Plants grown in the hydroponic solution also appeared to remove K from the solution each week but in smaller amounts than plants grown in RWW/hydroponic solution; plants grown in hydroponic solution alone did not appear to take up or add Na to the solution each week. It appears that sea hibiscus plants did osmotically adjust to increased salinity in the solution up to 4.2 dS/m. Changes in leaf proline concentra tion appear to be one of the first mechanisms to help plants regain water status followed by changes in ion uptake.
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Statement of Responsibility:
by Charles Wajsbrot.
Thesis:
Thesis (Ph.D.)--University of Florida, 2013.
Local:
Adviser: MOORE,KIMBERLY ANNE.
Local:
Co-adviser: FITZPATRICK,GEORGE E.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2014-12-31

Record Information

Source Institution:
UFRGP
Rights Management:
Applicable rights reserved.
Classification:
lcc - LD1780 2013
System ID:
UFE0046182:00001