Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 139-145 |
| Seitenumfang | 7 |
| Fachzeitschrift | Plant Science |
| Jahrgang | 53 |
| Ausgabenummer | 2 |
| Publikationsstatus | Veröffentlicht - 1987 |
| Extern publiziert | Ja |
Abstract
We have investigated the sequential stages of microgametogenesis by electron microscopy, to determine the basis of maternal inheritance of plastids in Epilobium. The development of both the vegetative and generative cells has been followed using a semi-artificial growth system for pollen tubes. The generative cells inside the pollen grain contains numerous mitochondria, 5-8 proplastids, and, in contrast to the vegetative cytoplasm, only a few vacuoles. When the generative cell has divided into the two sperm cells inside the pollen tube, small vesicles deriving from dicytosome cisternae become abundant. These vesicles appear to form vacuoles by fusion which then contain remnants of fibrillar, globular or membranaceous material. It is suggested that this material derives from proplastids as the proplastids disappear either before or shortly after the generative cell has divided, concurrently with the appearance of the 'remnants' in the vacuoles. The mitochondria of the sperm cells remain intact.
ASJC Scopus Sachgebiete
- Biochemie, Genetik und Molekularbiologie (insg.)
- Genetik
- Agrar- und Biowissenschaften (insg.)
- Agronomie und Nutzpflanzenwissenschaften
- Agrar- und Biowissenschaften (insg.)
- Pflanzenkunde
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in: Plant Science, Jahrgang 53, Nr. 2, 1987, S. 139-145.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Why are plastids maternally inherited in epilobium?
T2 - Ultrastructural observations during microgametogenesis
AU - Schmitz, Udo
AU - Kowallik, Klaus V.
PY - 1987
Y1 - 1987
N2 - We have investigated the sequential stages of microgametogenesis by electron microscopy, to determine the basis of maternal inheritance of plastids in Epilobium. The development of both the vegetative and generative cells has been followed using a semi-artificial growth system for pollen tubes. The generative cells inside the pollen grain contains numerous mitochondria, 5-8 proplastids, and, in contrast to the vegetative cytoplasm, only a few vacuoles. When the generative cell has divided into the two sperm cells inside the pollen tube, small vesicles deriving from dicytosome cisternae become abundant. These vesicles appear to form vacuoles by fusion which then contain remnants of fibrillar, globular or membranaceous material. It is suggested that this material derives from proplastids as the proplastids disappear either before or shortly after the generative cell has divided, concurrently with the appearance of the 'remnants' in the vacuoles. The mitochondria of the sperm cells remain intact.
AB - We have investigated the sequential stages of microgametogenesis by electron microscopy, to determine the basis of maternal inheritance of plastids in Epilobium. The development of both the vegetative and generative cells has been followed using a semi-artificial growth system for pollen tubes. The generative cells inside the pollen grain contains numerous mitochondria, 5-8 proplastids, and, in contrast to the vegetative cytoplasm, only a few vacuoles. When the generative cell has divided into the two sperm cells inside the pollen tube, small vesicles deriving from dicytosome cisternae become abundant. These vesicles appear to form vacuoles by fusion which then contain remnants of fibrillar, globular or membranaceous material. It is suggested that this material derives from proplastids as the proplastids disappear either before or shortly after the generative cell has divided, concurrently with the appearance of the 'remnants' in the vacuoles. The mitochondria of the sperm cells remain intact.
KW - Epilobium
KW - microgametogenesis
KW - plastids
KW - ultrastructural observations
UR - http://www.scopus.com/inward/record.url?scp=3242857753&partnerID=8YFLogxK
U2 - 10.1016/0168-9452(87)90123-3
DO - 10.1016/0168-9452(87)90123-3
M3 - Article
AN - SCOPUS:3242857753
VL - 53
SP - 139
EP - 145
JO - Plant Science
JF - Plant Science
SN - 0168-9452
IS - 2
ER -