Flavonoid composition of the pollen (pollen pellets) fromSalix caprea andS. alba

Chemistry of Natural Compounds -     

Flavonoids and silicon in certain plant pollen

The flavonoid composition of certain plant pollens is studied. Pollen from representatives of various families differs in the quantitative and qualitative composition of the flavonoid complex. A specially developed method is used to estimate the content of three Si species that differ in the strength of bonding to organic substances in the pollen samples. The coexistence in plant pollen of the bioflavonoids and Si increases the pharmacological value of this natural product. Translated from Khimiya Prirodnykh Soedinenii. No. 5, pp. 592–597, September–October, 1999.     

Carotenoids of Rhizobia. I. New Carotenoids from Rhizobium lupini

The main pigments of Rhizobium lupini were 2,3,2′,3′-di-trans-tetrahydroxy-β,β-caroten-4-one and 2,3,2′,3′-di-trans-tetrahydroxy-β,β-carotene. As minor components 7,8,7′,8′-tetrahydro-ψ, ψ-carotene (ζ-carotene), β, β-carotene (β-carotene), and tentatively, a 2,3,2′(or 3′)-trihydroxy-β, β-caroten-4-one and a 2,3,2′(or 3′)-trihydroxy-β, β-carotene were identified.     

Alkanes in the pollen and spores of various plants

Institute of Oceanology, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 135–136, January–February, 1989.