Culturing geranium at different doses of Zn from 0-1.0 g m-3 (Zn0 to Zn1.000) revealed that Zn is an antioxidant promoter, apart from its micronutrient essentiality. Zn0.250 was the critical concentration for maximum content (0.21 %) of total essential monoterpene oil(s). At Zn0.005-Zn0.250, net photosynthetic rate, and contents of chlorophyll and essential monoterpene oil(s) were affected. The maximum peroxidase activity was obtained at Zn0.250, with the production of biomolecule geraniol. We found an oxido-reducible reaction of Zn in the formation of monoterpene essential oil(s) and possibly major constituents of geraniol. and A. Misra ... [et al.].
Ve střední Evropě se vyskytují čtyři druhy kamyšníků (Bolboschoenus), které byli dříve považovány za jediný široce definovaný druh kamyšník přímořský (B. maritimus). Současná klasifikace spočívá v morfologii květenství a hlavně tvaru a anatomii nažek. Kamyšník širokoplodý (B. laticarpus) je na základě jeho přechodných znaků, chromozomového počtu a ekologie považován za hybridní druh. Taxonomická klasifikace středoevropských kamyšníků byla ověřena molekulární analýzou a rovněž se potvrdil i hybridní původ kamyšníku širokoplodého, jehož rodiče jsou kamyšník vrcholičnatý (B. yagara) a kamyšník polní (B. planiculmis)., Four taxa of the genus Bolboschoenus (Cyperaceae), formerly included in the broadly conceived species B. maritimus are distributed in Central Europe. Their current determination is based on the morphological characters of the inflorescence and especially the shape and anatomy of achenes. On the basis of intermediate morphology, chromosome numbers and ecological amplitude, B. laticarpus has been supposed to be a hybridogenous taxon. Taxonomical classification of Central European Bolboschoenus species was verified by genetic analyses and hybrid origin of B. laticarpus was verified, with the parentage B. yagara × B. planiculmis., and Soňa Píšová, Zdenka Hroudová, Tomáš Fér, Michal Ducháček, Petr Zákravský.