Endogenous hormonal content during grain development in wheat
Gutam, Sridhar; Nath, Virendra and Srivastava, G.C. (2008) Endogenous hormonal content during grain development in wheat. Bangladesh Journal of Agricultural Research, 33 (3). pp. 493-502. ISSN 0258-7122
This is the latest version of this eprint.
Full text available as:
A pot experiment was conducted in the Rabi (post rainy) seasons of 2001 and 2002 to study the genotypic differences in grain growth rate and endogenous hormonal content in the developing grains of hexaploid and tetraploid wheat. The endogenous hormonal contents of grains in both the ploidy levels had changed in sequence. At 5 days after anthesis (DAA), gibberellic acid (GA3); at 15 DAA (rapid growth phase), indole-acetic acid (IAA); at 25 DAA (dough stage), abscisic acid (ABA) were maximum. At 35 DAA, all the endogenous hormonal level decreased and among the hormones, ABA was highest followed by IAA and GA3. Hexaploids recorded higher concentrations of endogenous hormones (13.38% IAA, 17.89% GA3 and 14.7% ABA) on fresh weight basis and resulted in higher seed weight (56.99 mg/grain) and grain growth rate (0.009 g/g/day) compared to tetraploids (49.08 mg/grain; 0.008 g/g/day) on dry weight basis by better mobilization of photosynthates during grain filling.
Available Versions of this Item
Archive Staff Only: edit this record