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

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Abstract

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.

EPrint Type:Article
Uncontrolled Keywords:Grain Growth Rate, Hormones, Indole-acetic Acid, Gibberellic Acid, Abscisic Acid, Hexaploids, Tetraploids, Grains, Wheat
Subjects:Genetic Structures > Genome Components
Growth Substances, Pigments, and Vitamins > Growth Substances > Plant Growth Regulators
Growth Substances, Pigments, and Vitamins > Growth Substances
Food and Beverages > Food
Genetic Structures > Genome
Technology, Industry, and Agriculture > Agriculture
Plants > Plants, Edible
Genetic Phenomena > Ploidies
Plants > Plant Families and Groups > Angiosperms
Biological Phenomena, Cell Phenomena, and Immunity > Plant Physiology
ID Code:3167
Deposited By:Dr Sridhar Gutam
Deposited On:19 November 2008

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