RT Dissertation/Thesis
T1 Salinity and drought tolerance in Suaeda vermiculata, A habitat indifferent halophyte of the hyper-arid deserts of the united arab emirates (UAE)
A1 Al Shamsi, Naeema Sultan Abdulla
K1 Halofitas
K1 Cultivos tolerantes a la sal
K1 Suaeda vermiculata
K1 Plantas-Tolerancia a la sequía
K1 Salinidad
K1 Germinación
AB Few  halophytes  can  grow  well  in  both  saline  and  non-saline  habitats  (i.e.,  habitat- indifferent). These plants offer a good opportunity to assess maternal salinity on drought and salinity  tolerances  during  germination.  Habitat-indifferent  halophyte  Suaeda  vermiculata (Amaranthaceae) in a desert ecosystem of the United Arab Emirates (UAE) was assessed in this PhD Memory.Here,  we  assessed  the  effects  of  maternal  salinity,  drought  as  simulated  with  PEG (Polyethylene  glycol),  and  light  and  temperature  of  incubation  and  their  interactions  on germination.  In  addition  to,  the  effects  of  maternal  salinity,  temperature,  and  light  of  seed incubation  on  seed  dormancy  and  salinity  tolerance  during  the  seed  germination  stage. Furthermore,  determine  the  maternal  salinity  on  some  plant  physiological  and  biochemical traits on different organs of S. vermiculata from salty and non-salty habitats.Matured seeds of S. vermiculata in saline and non-saline soils were germinated in six PEG concentrations (0 to -1.0 MPa) and in different levels of salinity (0 to 500 mM NaCl) with incubation  in  different  temperatures  in  both  light  and  dark  regimes.  Studied  germination attributes were final germination, germination rate index (GRI) and germination recovery of non-germinated seeds when transferred to distilled water. Furthermore, samples of different organs were collected from both habitats. Physiological and bio-chemical features (chlorophyll and carotenoids, proline, malondialdehyde (MDA), and hydrogen peroxide (H2O2), antioxidant enzymes (Catalase, CAT; guaiacol peroxidase, GPX; Ascorbate peroxidase, APX) activities) were assessed. Elemental compositions in soil and plant samples from both habitats were also assessed.
PB UMA Editorial
YR 2022
FD 2022-06-09
LK https://hdl.handle.net/10630/24329
UL https://hdl.handle.net/10630/24329
LA eng
NO The results showed that drought tolerance was higher for seeds of the non-saline than those of saline habitat and this tolerance was more obvious at higher temperatures. Seeds of the saline habitat germinated in lower osmotic potentials (-0.8 and -1.0 MPa) only at lower temperatures, but those of the non-saline habitat germinated to higher levels at all higher temperatures. Germination rate index was significantly greater in seeds of non-saline at lower osmotic potentials. Most seeds that failed to germinate in the different PEG concentrations recovered their germination when transferred to distilled water.Seeds from both saline and non-saline habitats were germinated in different levels of salinity (0 to 500 mM NaCl) in both light and darkness at three different temperatures (15/25 °C, 20/30 and 25/35 °C). The overall germination was significantly greater for seeds of non-saline, compared to that of saline habitat. In addition, light germination was significantly
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026