title: Preparation of oligoalginate plant growth promoter by γ irradiation of alginate solution containing hydrogen peroxide.
abstract: Degraded alginate compounds with molecular weights of 7-26, 40-77, or 11-26 kDa were obtained by γ irradiation, hydrogen peroxide (5% H(2)O(2)) treatment, or a combination treatment involving ionizing radiation and H(2)O(2), respectively. The 14 kDa oligoalginate, prepared by the combined method, promoted the growth of mustard greens and lettuce at an optimal concentration of 75 mg/L. The growth promotion effects of the oligoalginate prepared by γ irradiation in the presence of H(2)O(2) were statistically equivalent to those of the oligoalginate prepared by γ irradiation only. The combination of γ irradiation and H(2)O(2) reduced the required irradiation dosage by a factor of 9 relative to the oligoalginate produced by γ irradiation only. The combination treatment (γ irradiation/H(2)O(2)) may be carried out on a large scale at low cost to produce oligoalginate for use as a plant growth promoter in agricultural industries.
authors.affiliation: Center for Nuclear Techniques, Vietnam Atomic Energy Commission, Ho Chi Minh City, Vietnam. lequangluan@gmail.com
authors.forename: Le Quang
authors.initials: le Q
authors.lastname: Luan
authors.forename: Vo Thi Thu
authors.initials: VT
authors.lastname: Ha
authors.forename: Nguyen Huynh Phuong
authors.initials: NH
authors.lastname: Uyen
authors.forename: Le Thi Thuy
authors.initials: le TT
authors.lastname: Trang
authors.forename: Nguyen Quoc
authors.initials: NQ
authors.lastname: Hien
mesh_terms: D000464:Alginates / Q000737:chemistry* / Q000494:pharmacology / Q000528:radiation effects; D005720:Gamma Rays; D020723:Glucuronic Acid / Q000737:chemistry / Q000494:pharmacology / Q000528:radiation effects; D006603:Hexuronic Acids / Q000737:chemistry / Q000494:pharmacology / Q000528:radiation effects; D006861:Hydrogen Peroxide / Q000737:chemistry*; D018545:Lactuca / Q000187:drug effects / Q000254:growth & development; D008970:Molecular Weight; D009149:Mustard Plant / Q000187:drug effects / Q000254:growth & development; D010937:Plant Growth Regulators / Q000138:chemical synthesis* / Q000494:pharmacology; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D010937:Plant Growth Regulators; D012996:Solutions; D020723:Glucuronic Acid; D006861:Hydrogen Peroxide