caa a22 4500 475817583 CHVBK 20180406123813.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1007/s004970050199 doi (NATIONALLICENCE)springer-10.1007/s004970050199 Pollen coatings - chimaeric genetics and new functions [Elektronische Daten] [H. G. Dickinson, C. J. Elleman, J. Doughty] Abstract : Pollen coatings have long been assumed to play a pivotal role in pollen-stigma interactions, but until now little clear evidence supporting such a function has been available. Recently, however, the use of isolated coatings of Brassica sp. in experiments in vivo has unequivocally demonstrated that the pollen coat layer is responsible for activation of the stigmatic surface, and that it contains the male determinant of the self-incompatibility system. Surprisingly, molecular analysis of the Brassica pollen coat reveals this layer to include both sporophytic and gametophytic components, the latter including a family of small highly-charged proteins which interact with stigmatic molecules known to be encoded by the S(incompatibility)-locus. Most recently, work on Brassica and Arabidopsis suggests that the adhesive function of the coating is more complex than suspected and involves both stigmatic factors and the exine surface itself. Despite this new insight into the genetics and function of pollen coatings, the mechanisms by which components of these layers are formed in the tapetum and translocated to the pollen grain surface remain far from clear. Springer-Verlag Berlin Heidelberg, 2000 Key words Arabidopsis, Brassica nationallicence Pollen coating nationallicence Pollination nationallicence Self-incompatibility nationallicence Dickinson H. G. Department of Plant Sciences, University of Oxford, Oxford, OX1 3RB, UK, E-mail: hugh.dickinson@plants.ox.ac.uk Fax: +44-1865-275805, GB aut Elleman C. J. Department of Plant Sciences, University of Oxford, Oxford, OX1 3RB, UK, E-mail: hugh.dickinson@plants.ox.ac.uk Fax: +44-1865-275805, GB aut Doughty J. Department of Plant Sciences, University of Oxford, Oxford, OX1 3RB, UK, E-mail: hugh.dickinson@plants.ox.ac.uk Fax: +44-1865-275805, GB aut https://doi.org/10.1007/s004970050199 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004970050199 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dickinson H. G. Department of Plant Sciences, University of Oxford, Oxford, OX1 3RB, UK, E-mail: hugh.dickinson@plants.ox.ac.uk Fax: +44-1865-275805, GB aut NATIONALLICENCE 700 1- Elleman C. J. Department of Plant Sciences, University of Oxford, Oxford, OX1 3RB, UK, E-mail: hugh.dickinson@plants.ox.ac.uk Fax: +44-1865-275805, GB aut NATIONALLICENCE 700 1- Doughty J. Department of Plant Sciences, University of Oxford, Oxford, OX1 3RB, UK, E-mail: hugh.dickinson@plants.ox.ac.uk Fax: +44-1865-275805, GB aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer