Meet OYETUNJI SHAKIRAT OPEYEMI, an Academic Staff of Lagos State University.
Plant Physiology And Biochemistry
Lecturer II
Botany
At the Botany department office
Appointment on Visitation important
Topic: Salinity Tolerance And Physiological Mechanisms
Description: Stress physiology and seed germination
| # | Certificate | School | Year |
|---|---|---|---|
| 1. | Ph.D (Botany) | Department of Botany, Lagos state university | 2026 |
Morpho-physiological, nutritional and some metabolites profiling of five Cyperus L. species subjected to salinity stress
Salinity stress is one of the most severe abiotic
constraints limiting the growth of plants, including Cyperus.
Comparative physiological and biochemical evaluations of salinity tolerance
among Cyperus species remain limited. This study investigated the
effects of salinity stress on seed germination, seedling emergence, vegetative
growth, nutritional composition, physiological and biochemical responses in
five Cyperus species. The germination experiment in Petri dishes and the
growth phase in soil on the five Cyperus species, namely Cyperus
esculentus var. macrostachyus (KX369456.1), Cyperus malaccensis
(OR438648.1), Cyperus rotundus (NC_050170.1), Cyperus rotundus
(MT937176.1), and Cyperus esculentus (NC_058698.1) at varying
concentrations (25%, 50%, 75% and 100%) of sodium chloride (NaCl) and seawater
treatments, with distilled water as control. Data was analysed
using multivariate analysis of variance with Cyperus species, salinity types
and concentrations as factors. All germination indices
measured decreased significantly (p <0.05) with an increase in NaCl and
seawater concentrations across the five species. The increasing order of
germination of the plant is NC_058698.1>KX369456.1>MT937176.1>NC_050170.1>OR438648.1
for both stressors, with germination percentages ranging from 98% to 2.00%.
Germination occurred in all species treated with NaCl, but none occurred at 75%
and 100% seawater. Proximate composition of the species increased in order
NC_058698.1>KX369456.1>MT937176.1> OR438648.1>NC_050170.1. Mineral
nutrient analysis revealed that iron content decreased with increasing NaCl and
seawater. Sodium content increased significantly (p<0.05) across all species
with increasing NaCl and seawater concentrations. Biochemical compositions of
the five Cyperus showed similar tolerance levels to salinity across
minerals, antioxidant enzyme activities, and amino acid profiles in order of
NC_050170.1> KX369456.1>OR438648.1> NC_058698.1>MT937176.1. Both salinity treatments increased the
synthesis of secondary metabolites compared to the control in all five Cyperus
species. In conclusion, salinity tolerance
in Cyperus species varies with salinity concentration and is controlled by a
coordinated network of morpho-physiological and biochemical responses.
OYETUNJI OPEYEMI is a Lecturer II at the Department of Botany
OYETUNJI has a Ph.D in Botany from Department of Botany, Lagos state university
