Journal of Pharmacognosy and Phytochemistry
Vol. 9, Issue 1 (2020)
Gibberellin sensitivity study shows key insights into the GA3 pathway in a semi-dwarf rice mutant of improved white Ponni
Andrew-Peter-Leon MT, M Arumugam Pillai, Kumar KK, R Pushpam and R Kannan
Improved White Ponni (IWP) is a popular rice variety in south India. We have developed WP-22-2, a semi-dwarf mutant of Improved White Ponni through gamma-ray induced mutation breeding. Gibberellin sensitivity of the mutant was studied by spraying 50 μM GA3
hormone on ten days old seedlings and after three days, seedling height, 1st
internode and 2nd
leaf lengths were measured. The variances between the treatments were compared using Student’s t-test. The IWP was 2.54 cm taller than the untreated mutant. The 1st
internode length between the two varied with high significance (P =
.003). The GA3
treatment has increased the seedling height of the mutant 6.0 cm in three days. The reversion of plant height in the mutant showed that the mutations in the GA3
pathway have caused defective gibberellin production which ultimately reduced the plant height in the mutant.
Pages: 2075-2077 | 606 Views 206 Downloads
Andrew-Peter-Leon MT, M Arumugam Pillai, Kumar KK, R Pushpam and R Kannan. Gibberellin sensitivity study shows key insights into the GA3 pathway in a semi-dwarf rice mutant of improved white Ponni. J Pharmacogn Phytochem 2020;9(1):2075-2077.