Pollen—stigma Interactions: Development and Cytochemistry of Stigma Papillae and their Secretions in Annona squamosa L. (Annonaceae)

Structure and Cytochemical Features of Stigma and Style of Ornithogalum Sigmoideum Freyn&Sint, Unpollinated and Pollinated Pistil

“…In Lilium (Loewus and Labarca, 1973), Annona (Vithanage, 1984) and Sternbergia (Ciampolini et al, 1990) the canal secretions are rich in polysaccharides but show a weak reaction for proteins. Light and EM observations of these canals revealed the almost complete absence of lipids.…”

“…Acid phosphatase activity is intense in the subepidermal cell layers, reflecting their secretory function (Vithanage, 1984). Peroxidase activity is very high during maturity and pollen-receptive stages of angiosperm stigmas.…”

Pollen, pistil and their interrelations inBorago officinalisandHeliotropium europaeum(Boraginaceae)

“…Many works have dealt with these problems (Ashford & Knox 1980, Clarke et al 1977, Dickinson & Lewis 1975, Elleman & Dickinson 1990, Heslop-Harrison 1975, Knox 1973, Lord & Heslop-Harrison 1984, Owens et al 1984, Pacini 1981, Rosen 1975, Sedgley 1981, Sedgley & Scholefield 1980, Sedgley & Smith 1989, Shivanna et al 1978, Vithanage 1984, Weller & Ornduff 1989.…”

“…These proteins are involved in pollen-pistil interaction (De Nettancourt 1972, Dickinson & Lewis 1973, Dumas 1989, Dumas & Gaude 1981Dumas & Russell 1992, Dumas et al 1993, Heslop-Harrison 1975, Knox et al 1976Pacini et al 1981, Roberts et al 1979,1984Sastri & Shivanna 1979, Sedgley et al 1985, Shivanna & Sastri 1981.…”

Floral color changes in Boswellia sacra Flueck. (Burseraceae): A dialogue between plant and pollinator

“…Post-pollination stigmatic secretion has been reported in many species, and it has been suggested to facilitate pollen germination (Kenrick and Knox, 1981;Marginson et al, 1985;Sedgley and Scholefield, 1980;Vithanage, 1984), providing additional nutrients.…”