Tradescantia bracteata pollen in vitro: pollen tubes development and mitosis
نویسندگان
چکیده
منابع مشابه
How pollen tubes grow.
Sexual reproduction of flowering plants depends on delivery of the sperm to the egg, which occurs through a long, polarized projection of a pollen cell, called the pollen tube. The pollen tube grows exclusively at its tip, and this growth is distinguished by very fast rates and reaches extended lengths. Thus, one of the most fascinating aspects of pollen biology is the question of how enough ce...
متن کاملDetermination of secretory vesicle production rates by dictyosomes in pollen tubes of Tradescantia using cytochalasin D.
Pollen tubes of Tradescantia were grown in vitro and exposed to 0.3 microgram/ml cytochalasin D for 5 or 10 min. Fine-structural observations revealed no visible effect of the drug on the organelles. Stereological analysis, using a method recently developed by Rose (1980) to obtain sphere size-distributions corrected for section thickness, revealed substantial increase in the number of secretor...
متن کاملA Study of Chemotropism of Pollen Tubes in Vitro.
Introduction Although much has been added to our knowledge concerning the requirements for pollen germination and pollen tube growth in recent years (1, 2, 4, 10, 17, 18), very little progress has been made in studying chemotropism of pollen tubes. Literature dealing with this subject prior to 1924 has been reviewed by BRINK (3). There is an obvious lack of agreement among the different workers...
متن کاملPlant Fertilization: Bursting Pollen Tubes!
Higher plants don't have motile sperm; they rely on pollen tubes to deliver them. Recent research has identified key components involved in pollen tube tip bursting that allow sperm release and fertilization.
متن کاملStructural and functional compartmentalization in pollen tubes.
Eukaryotic cellular functions are achieved by concerted activities in the cytosol and functions compartmentalized in the nucleus and other membrane-bound organelles. Moreover, the cytosol and nucleoplasm are populated with mega molecular ensembles that are specialized for different metabolic and biochemical processes. Pollen tubes are unique plant cells with a dramatic growth polarity. Tube gro...
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: Acta Societatis Botanicorum Poloniae
سال: 2015
ISSN: 2083-9480
DOI: 10.5586/asbp.1977.047