The Biobrio 2(1 & 2), 2015

EFFECT OF CERTAIN PHYTOHORMONES ON SEED GERMINATION AND SEEDLING GROWTH OF TECOMA STANS (L.) H.B.K.

M. Kumar, D. K. Soni and U. Jain

ABSTRACT:

Tecoma stans popularly known as yellow elder, yellowbells is the member of the family Bignoniaceae. The plant is a shrub or a small tree upto six meter tall. Seeds of T. stans are flat oblong with transparent wings on each end. Fresh seeds germinate readily in sandy soil in the spring. In the present investigation, various plant growth regulators viz., IAA, IBA, NAA and GA have been used to study their effect on seed germination and seedling 3 growth. Various concentrations (10, 50, 100, 500 and 1000 ppm) of PGRs have been taken along with control. Maximum seed germination was recorded at 10 and 50 ppm of IAA whereas least germination was recorded at 100 ppm of IBA. Radicle length was observed maximum at 10 ppm of IAA. Hypocotyle length was observed maximum at 100 ppm of GA 3 (4.72 cm) and minimum at 50 ppm of NAA (1.56 cm). Overall, the result was observed nil at 500 and 1000-ppm concentrations of all PGRs for all the 3 parameters.

Keywords:    

Tecoma stans, growth regulators, seed dormancy and seed germination

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