title: Impact of sunflower (Helianthus annuus L.) extracts upon reserve mobilization and energy metabolism in germinating mustard (Sinapis alba L.) seeds.
abstract: One commonly observed effect of phytotoxic compounds is the inhibition or delay of germination of sensitive seeds. Mustard (Sinapis alba L.) seeds were incubated with aqueous extracts of sunflower (Helianthus annuus L.) leaves. Although sunflower phytotoxins did not influence seed viability, extracts completely inhibited seed germination. Inhibition of germination was associated with alterations in reserve mobilization and generation of energy in the catabolic phase of germination. Degradation of lipids was suppressed by sunflower foliar extracts resulting in insufficient carbohydrate supply. The lack of respiratory substrates and decrease in energy (ATP) generation resulted in suppression of the anabolic phase of seed germination and ultimately growth inhibition.
authors.affiliation: Department of Plant Anatomy and Cytology, Institute of Experimental Plant Biology, Warsaw University, Miecznikowa 1, 02-096, Warsaw, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Kupidłowska
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Gniazdowska
authors.forename: Joanna
authors.initials: J
authors.lastname: Stepień
authors.forename: Francoise
authors.initials: F
authors.lastname: Corbineau
authors.forename: Dominique
authors.initials: D
authors.lastname: Vinel
authors.forename: Andrzej
authors.initials: A
authors.lastname: Skoczowski
authors.forename: Anna
authors.initials: A
authors.lastname: Janeczko
authors.forename: Renata
authors.initials: R
authors.lastname: Bogatek
mesh_terms: D000255:Adenosine Triphosphate / Q000096:biosynthesis; D004734:Energy Metabolism / Q000187:drug effects; D018525:Germination / Q000187:drug effects*; D006368:Helianthus / Q000737:chemistry*; D050356:Lipid Metabolism; D010936:Plant Extracts / Q000494:pharmacology*; D012639:Seeds / Q000187:drug effects / Q000502:physiology; D031226:Sinapis / Q000187:drug effects* / Q000254:growth & development; D014118:Toxins, Biological / Q000494:pharmacology*
chemical_list: D010936:Plant Extracts; D014118:Toxins, Biological; D000255:Adenosine Triphosphate