title: The effect of photoperiod on endogenous gamma-tocopherol and plastochromanol in leaves of Xanthium strumarium L. (cocklebur).
mesh_terms: D001578:Benzopyrans / Q000378:metabolism*; D002839:Chromans / Q000378:metabolism*; D003624:Darkness; D008027:Light; D010944:Plants / Q000378:metabolism*; D013997:Time Factors; D014810:Vitamin E / Q000378:metabolism*
chemical_list: D001578:Benzopyrans; D002839:Chromans; D014810:Vitamin E