Content of basic macroelements in common parasitical weeds

Abstract

The content of N, P₂O₅, K₂O, CaO and MgO was measured in parasitical weeds, as well as in their host plants and in the soil. The soil was also analyzed for its humus content and pH. The statistical analysis of the results justified the ascertation that, on the average, weeds were richer in macroelements then their host plants. In the investigated two groups of plants, both differences as well as similarities in the usage of the mentioned components were found, and the component content in parasites was dependent not only on particular chemical compositions of host plants, but also on soil characteristics

Drought or Severe Drought? Hemiparasitic Yellow Mistletoe (Loranthus europaeus) Amplifies Drought Stress in Sessile Oak Trees (Quercus petraea) by Altering Water Status and Physiological Responses

“…This may be the main reason why the content of some mineral nutrients is higher in mistletoe leaves than in infested and non-infested oak trees. Many other authors have reported similar findings on various host and mistletoe species [89][90][91] Mistletoe parasitism is a strategy for N acquisition [61,88]. In our study, the N content was markedly lower in mistletoe than in both infested and non-infested oaks.…”

Alterações fisiológicas e bioquímicas da interação >i<Cuscuta racemosa>/i< Mart. x >i<Malvaviscus arboreus>/i< Cav.

“…manteve o efeito da infecção primária, constatando-se assim a ação dos diferentes parasitas sobre o mesmo hospedeiro, comprovando respostas à infecção. Malicki & Berbeciowa (1986) Cuscuta spp. em petúnia hfürida, os níveis de proteína e fósforo sofreram redução na planta hospedeira pela primeira infecção por Orobanche spp., mantendo-se assim durante a segunda infecção por Cuscuta spp.…”