Summary
This paper describes the unequal distribution of plastids in the developing microspores of Impatiens walleriana and Impatiens glandulifera which leads to the exclusion of plastids from the generative cell. During the development from young microspore to the onset of mitosis a change in the organization of the cytoplasm and distribution of organelles is gradually established. This includes the formation of vacuoles at the poles of the elongate-shaped microspores, the movement of the nucleus to a position near the microspore wall in the central part of the cell, and the accumulation of the plastids to a position near the wall at the opposite side of the cell. In Impatiens walleriana, the accumulated plastids are separated from each other by ER cisterns, and some mitochondria are also accumulated. In both Impatiens species, the portion of the microspore in which the generative cell will be formed is completely devoid of plastids at the time mitosis starts.
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References
Brighigna L, Cecchi-Fiordi A, Palandri MR (1981) Ultrastructural investigations on the two-nucleate pollen grain of Tillandsia caput-medusae Morr. (Bromeliaceae). Am J Bot 68:1033–1041
Burgess J (1979) Cell shape mitotic spindle formation in the generative cell of Endymion non-scriptus. Planta 95:72–85
Carniel K (1972) Elektronenmikroskopische Analyse der Pollenentwicklung von Heleocharis palustris. Österr Bot Z 120: 223–234
Cass DD (1973) An ultrastructural and Nomarski-interference study of the sperms of barley. Can J Bot 51:601–605
Cocucci A, Jensen WA (1969) Orchid embryology: pollen tetrads of Epidendrum scutella in the anther and on the stigma. Planta 184:215–229
Cresti M, Ciampolini F, Pacini E, Sarfatti G, Donini B (1979) Ultrastructural features of Prunus avium L. pollen tube in vivo. 1. The compatible pollen tube. Caryologia 32:433–440
Dupuis F (1972) Formation de la paroi de séperation entre la cellule génératrice et la cellule végétative dans le pollen d'Impatiens balsamina L. Bull Soc Bot Fr 119:41–50
Hagemann R (1981) Unequal plastid distribution during the development of the male gametophyte of angiosperms. Acta Soc Bot Pol 50:321–327
Hoefert LL (1969) Ultrastructure of Beta pollen. 1. Cytoplasmic constituents. Am J Bot 56:363–368
Karas I, Cass DD (1976) Ultrastructural aspects of sperm cell formation in rye: evidence for cell plate involvement in generative cell division. Phytomorphology 26:36–45
Larson DA (1965) Fine structural changes in the cytoplasm of germinating pollen. Am J Bot 52:139–154
Pacini E, Cresti M (1976) Close association between plastids and endoplasmic reticulum cisterns during pollen grain development in Lycopersicon peruvianum. J Ultrastruct Res 57:260–265
Richter-Landmann W (1959) Der Befruchtungsvorgang bei Impatiens glandulifera royle unter Berücksichtigung der plasmatischen Organelle von Spermazelle, Eizelle und Zygote. Planta 53:162–177
Sanger JM, Jackson WT (1971) Fine structure study of pollen development in Haemanthus katherinae Baker. 1. Formation of vegetative and generative cells. J Cell Sci 8:289–301
Van Went JL (1974) The ultrastructure of Impatiens pollen. In: Linskens HF (ed) Fertilization in higher plants. North Holland, Amsterdam, pp 81–88
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Communicated by R. Hagemann
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van Went, J.L. Unequal distribution of plastids during generative cell formation in Impatiens . Theoret. Appl. Genetics 68, 305–309 (1984). https://doi.org/10.1007/BF00267882
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DOI: https://doi.org/10.1007/BF00267882