Pollen

Linskens, H. F.

doi:10.1007/978-3-642-95000-1_15

Cited by 11 publications

(7 citation statements)

References 135 publications

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“…Germination took place in the dark at 28°C. Differences were not observed in germination and growth between pollen in suspension culture or on solid sur faces, or between pollen grown on water or other media (Linskens 1967) (data not shown).…”

Section: Plant Materialsmentioning

confidence: 85%

Development and cellular organization of Pinus sylvestris pollen tubes

Win

Knuiman

Pierson

et al. 1996

Sexual Plant Reproduction

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The organization of Pinus sylvestris pollen tubes during growth was studied by video microscopy of living cells and by electron microscopy after freeze-fixation and freeze-substitution (FF-FS). Pollen germinated and the tubes grew slowly for a total period of about 7 days. Some of the grains formed two tubes, while 10-50% of the tubes ramified. These features are in accordance with development in vivo. The cytoplasmic hyaline cap at the tip disappeared during the 2nd or 3rd day of culture. Ag gregates of starch grains progressively migrated from the grain into the tube and later into the branches. Vacuoles first appeared at day 2 and eventually filled large parts of the tube. The tube nucleus was located at variable dis tances from the tip. Some of the organelles showed lin ear movements in a mostly circulatory pattern, but the majority of the organelles showed brownian-like move ments. Rhodamine-phalloidin-stained actin filaments had a gross axial orientation and were found throughout the tube including at the tip. The ultrastructure of pollen tubes was well preserved after FF-FS, but signs of shrinkage were visible. The secretory vesicles in grow ing tips were not organized in a vesicle cone, and coated pits had a low density with only local accumulations, which is in accordance with slow growth. The mitochon dria contained small cristae and a darkly stained matrix and were located more towards the periphery of the tube, indicating low respiratory activity and low oxygen lev els. The dictyosomes carried typical trans-Golgi net works, but some contained less than the normal number o f cisternae. Other elements of the cytoplasm were irreg ularly spaced rough endoplasmic reticulum, many multivesicular bodies, lipid droplets and two types of vacu oles. The typical organization associated with tip growth in angiosperm pollen tubes, e.g. Ni.coti

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Section: Plant Materialsmentioning

confidence: 85%

Development and cellular organization of Pinus sylvestris pollen tubes

Win

Knuiman

Pierson

et al. 1996

Sexual Plant Reproduction

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“…It is known that there is an exchange of numerous substances (probably also mineral elements) between the pollen and the pistil (Heslop-Harrison 1987;Linskens 1967;Linskens and Schrauwen 1969). Moreover, a complementary relationship has been observed for some amino acids between the pollen and the style in maize that is under genotypic control (Linskens and Pfahler 1977).…”

Section: Discussionmentioning

confidence: 97%

Wall ultrastructure and biochemical features of the Juglans regia L. and Juglans nigra L. male gametophyte

Calzoni

Speranza

Caramiello

et al. 1990

Sexual Plant Reprod

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Summary. The Juglans regia • Juglans nigra hybrid cannot be obtained because of stable interspecific barriers. We have analyzed and described various morphological and biochemical characters in J. regia and J. nigra pollen: differences in the mineral composition, polysaccharide reserves, wall ultrastructure and protein pattern of soluble cytoplasm, membranes, and cell-wall fractions. The absence of a glycoprotein fraction in the wall of J. nigra suggests that the regulation of critical steps in the interspecific matching with female tissues could be affected.

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“…It finds its way through different types of tissue, enters the ovule and grows into the embryosac where it releases its contents for fusion with the egg . This complex of events includes a chain of processes in both partners, of which those in the pollen (tube) must be accurately coordinated and interact with those in the pistil (LINSKENS, 1967(LINSKENS, , 1968STANLEY, 1971 ;ROSEN, 1971) . In this relationship the pistil material functions as a complex of barriers and promoters, the pollen grain as an organism carrying all genetic information necessary to penetrate all barriers and react to all promoters between pollination and fertilization .…”

mentioning

confidence: 99%

A model for incongruity in intimate partner relationships

Hogenboom¹

1973

Euphytica

118

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A model for incongruity in intimate partner relationships is described . The model is tested with results from earlier research on intimate partner relationships in plants and these results are reinterpreted . It is demonstrated that in relationships between partners from different populations incongruity, i .e . non-functioning of a partner relationship resulting from a lack of genetic information in one partner about the other, plays a major role, while that of incompatibility is secondary or absent . Sexual partner relationships and host-parasite relationships are shown to be essentially similar as regards their genetic basis . Some practical implications of incongruity are mentioned .

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Pollen

Cited by 11 publications

References 135 publications

Development and cellular organization of Pinus sylvestris pollen tubes

Development and cellular organization of Pinus sylvestris pollen tubes

Wall ultrastructure and biochemical features of the Juglans regia L. and Juglans nigra L. male gametophyte

A model for incongruity in intimate partner relationships

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