Abstract:
Salt stress is the most significant constraint for agricultural production in arid and
semi-arid regions. This study was conducted to determine and assess the tolerance of
different tomato genotypes under saline conditions. Fourteen tomato genotypes were
grown in pots were assayed at three salinity levels viz., 50 mM NaCl, 100 mM NaCl
and 150 mM NaCl and compared with control (0 mM NaCl). The detrimental effects
of salt stress on the plants were evident with increasing doses of NaCl. Salt stress
significantly decreased the shoot and root length, seedling fresh weight, leaf area,
chlorophyll content and relative water content of tomato genotypes. The tested tomato
genotypes exhibited different responses for salinity severity indices (SSI). In all the
salinity treatments, shoot length reduction showed the positive and the highest
correlation with STI. Based on the results of the experiment, the genotypes BARI
Tomato-11, BARI Tomato-14, BARI Tomato-21 and Manik were found to be tolerant
to salinity. Therefore, these three genotypes may be recommended to cultivate under
the saline condition of Bangladesh and also may be used in the future breeding
program to develop salinity tolerant tomato genotypes.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
In Partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
HORTICULTURE
