Dissecting the Impact of Brassinolide Levels on Different Tomato Varieties
Dissecting the Impact of Brassinolide Levels on Different Tomato Varieties
Gulzar Ullah1*, Riaz Alam1, Gohar Ayub2 and Ibrar Hussain3
ABSTRACT
A field experiment was carried out to study the role of brassinolide treatments (0, 0.5 ppm, 1 ppm and 1.5 ppm) on growth and development of three tomato varieties (Yaqui, Roma and Rio Grande) at Horticulture Research Farm of Department of Horticulture, The University of Agriculture Peshawar during 2017-18. The experiment was conducted in a randomized complete block design (RCBD) with two factors replicated three times. 24-Epibrassinolide was used as a source for brassinolide. Results revealed that brassinolide and varieties significantly influenced the growth and yield parameters of tomato. Regarding different varieties, maximum number of leaves per plant (118.47), plant height (82.72 cm), number of flowers per cluster (5.91), number of flower clusters per plant (16.95) and yield (22.27 t ha-1) was obtained in Rio Grande plants in contrast to Roma and Yaqui plants. Roma plants resulted in lowest blossom end rot (14.96%) as compared to Yaqui and Rio Grande. Regarding various brassinolide levels, maximum number of leaves per plant (116.41), plant height (85.48 cm), number of flowers per cluster (5.83), yield (22.24 t ha-1) and decreased blossom end rot (15.31%) was noted in plants treated with 2ppm brassinolide concentration which were significantly not different from results recorded for plants applied with 1.5ppm brassinolide except for plant height. Furthermore, number of flower clusters per plant (16.75) resulted in plants treated with 1.5ppm brassinolide concentration. The interaction between varieties, brassinolide concentration and years of study revealed non-significant results for most of the studied attributes. It was concluded that treatment of tomato plants with 1.5ppm brassinolide concentration resulted in maximum growth and yield attributes.
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