Abstract:
Drought is one of the major limiting factors that have a significant impact on global
tomato production. A reliable evaluation system is needed to identify true droughttolerant
tomato genotypes, which will aid in the breeding program. Therefore, this
study was conducted to determine the drought tolerance of nineteen tomato
genotypes. Drought stress was achieved by fully turning off the water supply to plants
grown in shed house conditions. Two weeks after transplanting, the seedlings
received the treatments (drought and regular irrigation) for two weeks. Two weeks
after water stress, several parameters such as shoot and root length, plant biomass,
photosynthetic pigments, relative water content, reducing sugar and total phenol were
measured. Research revealed significant differences in the evaluated traits between
the control and drought-stressed plants. Drought severity stress showed a positive
correlation with the reduction of plant growth, relative water content, and
photosynthetic pigments, as well as an increase in reducing sugar and phenol levels.
BARI Tomato 14, BARI Tomato 15, and BARI F
1
Tomato 4 were found to be
drought tolerant than other cultivars based on the various measured parameters. The
findings indicate that measurements of shoot dry weight, relative water content, and
shoot length are better for determining drought stress and screening drought-tolerant
tomato genotypes.
Description:
A Thesis
Submitted to Department of Entomology,
Faculty of Agriculture.
Sher-e-Bangla Agricultural University,
Dhaka-
In partial fulfillment of the requirements for the degree of
MASTERS OF SCIENCE (MS)
IN
DEPARTMENT OF HORTICULTURE
