Features of ionogenic group composition in polymeric matrix of lily pollen wall

Meychik, N.R.; Matveyeva, N.P.; Nikolaeva, Y.I.; Chaikova, A.V.; Yermakov, I.P.

Авторы: Meychik N.R., Matveyeva N.P., Nikolaeva Yu I., Chaikova A.V., Yermakov I.P.
Журнал: Biochemistry (Moscow)
Том: 71
Номер: 8
Год издания: 2006
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 893
Последняя страница: 899
DOI: 10.1134/S0006297906080116
Аннотация: The composition of ionogenic groups and ion-exchange capacity were studied in the polymeric matrix of cell walls isolated from the pollen grain and tissues of vegetative organs (leaves and stems) of Lilium longiflorum Thunb. The ion-exchange capacity was evaluated at different pH values and ionic strength of 100 mM. In the two-layered pollen wall and the somatic cell walls four types of ionogenic groups were found: amino groups, two carboxyl groups (represented by residues of uronic and hydroxycinnamic acids), and phenolic OH-groups. The groups of all four types are present in the intine, whereas the exine contains one type of anion-exchange and two types of cation-exchange groups. The contents of each type group and their ionization constants were determined. The qualitative and quantitative compositions of structural polymers of the pollen intine and somatic cell walls are significantly different. It is suggested that hydroxycinnamic acids should be involved in cross-linking of polysaccharide chains in both the intine and somatic cell primary walls, and such cross-links play a crucial role in the structural organization and integrity of the pollen grain wall.
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Features of ionogenic group composition in polymeric matrix of lily pollen wallстатья