Effect of NaCl salinity
on germination,
growth,gas exchanche
and yield of greenhouse
eggplant
solanaceae
Solanum melongena var.
Delica
Eggplant :
The completely randomized
block design
6 treatments
Zero (cintrol)
10mmol
25
50
100
150
16 plant for per treatment
Effect of salinity on
germination
External NaCl salinity up to 50
mmol delayed germination but did
not reduce the final percentage: at
100 mmol and 150mmol the seed
germination was reduced
significantly.
Effect of salinity on radicle length of
eggplant seeds
No diffrences were found in radicle elongation up to
50mmol NaCl. Only at 100mmol and 150 mmol
NaCl was radicle elongation severely affected by
salinity when at day 7 after starting the test, 36%
and 74% reductions in length respectively, were
observed compared with the other salinity levels.
Effect of salinity on the
emergence of germinated seeds
and growth of seedlings
Seedling emergence was reduced significantly at
100 mmol and 150 mmol NaCl, where 85% and
75% of the germinated seeds had emerged,
respectivly, after 14 days.
The seedling height as well as the leaf area
and dry weight were significantly higher at 0
and 10 mmol NaCl, decreased as the external
salinity increased.
Effect of salinity on shoot length(SL)
and shoot dry weight(SDW)
Wegetative growth, i.e. shoot length and dry
weight, 6 weeks after salt imposition, were
significantly reduced at salinities higher than
10 mmol.
Effect of salinity on total leaf
area
Leaf size was the most sensitive
parameter to NaCl salinity while
leaf number was not affected.
Effect of salinity on the
concentration of various ions
within the leaves
Leaf tissue concentrations of Cl‾ and
Na+ increased significantly with
increasing external NaCl salinity in the
rooting medium while K+ showed a
trend to decrease.
Effect of salinity on
photosynthetic rate
There was significantl difference in
Pn rate between leaves 20 and 28
on a unit area basis.
Effect of salinity on
yield
yield decreased significantly with
increasing salinity over 10 mmol NaCl.
 The average fruit weight was reduced
significantly at 50mmol NaCl, while the
totol number of fruit harvested at 25mmol.
 The lower yield at25mmol NaCl was due
to a decrease in number of fruits per plant
only, whereas at 50mmol,100mmol and
150mmol both the number and size of the
fruit were reduced.