Pollen differentiation as well as pollen tube guidance and discharge are independent of the presence of gametes
نویسندگان
چکیده
منابع مشابه
Pollen differentiation as well as pollen tube guidance and discharge are independent of the presence of gametes
After meiosis, an unequal cell division generates the male gamete lineage in flowering plants. The generative cell will undergo a second division, giving rise to the two gametes, i.e. the sperm cells. The other cell will develop into the vegetative cell that plays a crucial role in pollen tube formation and sperm delivery. Recently, the vegetative cell has been suggested to be important for pro...
متن کاملPollen tube guidance by the female gametophyte.
In flowering plants, pollen grains germinate on the pistil and send pollen tubes down the transmitting tract toward ovules. Previous genetic studies suggested that the ovule is responsible for long-range pollen tube guidance during the last phase of a pollen tube's journey to the female gametes. It was not possible, however, to unambiguously identify the signaling cells within an ovule: the hap...
متن کاملPollen Tube Guidance in Flowering Plants
Higher “plants minimize their exposure to pollen from diverse species by precise regulation of flowering time, development of floral organs, and interactions with specific pollinators. These measures do not guarantee success, however, because of the vast quantities of pollen in the environment. Consequently, to ensure that only the appropriate sperm are delivered to the eggs, many plants have e...
متن کاملPollen and Pollen Tube Proteomics
Germinated pollen grains form pollen tubes that accomplish rapid polarized growth within female gametophytic tissues in order to deliver the sperm cell to the ovule. This process is essential for successful plant fertilization in vivo. Pollen tubes are considered to be an ideal model system to study tip growth. A more comprehensive understanding of proteins involved in pollen development, germi...
متن کاملFemale gametophyte-controlled pollen tube guidance.
During the evolution of flowering plants, their sperm cells have lost mobility and are transported from the stigma to the female gametophyte via the pollen tube to achieve double fertilization. Pollen tube growth and guidance is largely governed by the maternal sporophytic tissues of the stigma, style and ovule. However, the last phase of the pollen tube path is under female gametophyte control...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Development
سال: 2017
ISSN: 1477-9129,0950-1991
DOI: 10.1242/dev.152645