EFFECT OF SALINITY STRESS ON SEED GERMINATION OF SOME TOMATO VARIETIES

Document Type : Research articles.

Author

Dept. of Horticulture, Faculty of Agric., Al-Furat Univ.

Abstract

Several experiments were carried out during 2006-2007 seasons in
Horticulture Laboratory, Faculty of Agriculture Al-Furat Univ. to evaluate three
tomato varieties under different levels of salinity at germination stage and select
salt tolerant varieties compared with sensitive ones. Split Blot Design with
eighth replicates was used. Two factors were applied: Salt concentrations (0,
0.28, 0.57 and 0.85 % NaCl) and three varieties (e.g. Pakmor, Special Back and
Call Ace or Ice).
Data analysis showed significant differences in response between
studied tomato varieties and salinity stress at germination stage. Increasing salt
concentration in planting medium –except at 2nd treatment- caused decreased in
all studied growth criteria, especially decreasing in germination time and
elongating of necessary ability to germinate in all concerned varieties.
On the other hand, increasing of salinity caused a growth inhibition, as
radicl length, root and shoot living mass were decreased. According to the
results, Special Back was more sensitive to high salinity, whereas Pakmor less
one and Call Ice the medium. Also, variation analysis showed a exchangeable
interaction between varieties and salinity, indicating that varieties had different
response at each salinity concentration.


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