Pollen and Pollen Enzymes
نویسندگان
چکیده
منابع مشابه
Pollen 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 کاملAllergenic pollen and pollen allergy in Europe.
The allergenic content of the atmosphere varies according to climate, geography and vegetation. Data on the presence and prevalence of allergenic airborne pollens, obtained from both aerobiological studies and allergological investigations, make it possible to design pollen calendars with the approximate flowering period of the plants in the sampling area. In this way, even though pollen produc...
متن کاملPollen
Does cohesion fatigue play a role in the ‘maternal age effect’? The frequency of aneuploid conceptions in humans increases strikingly with maternal age, approaching 35% for women in their 40s. Remarkably, if studies of mouse oocytes are applicable to humans, it appears that the actual cohesin molecules that bind chromatids together in the oocytes of women may be decades old. In mammals, S phase...
متن کاملPollen sporoplasts: dissolution of pollen walls.
4-Methylmorpholine N-oxide monohydrate (MMNO.H(2)O), a potent solvent for polysaccharides, is an effective vehicle for release of membrane-enclosed male gametophytes (sporoplasts) from spore walls. This release occurs in minutes when pollen (Lilium longiflorum Thunb.) is suspended in a melt of MMNO.H(2)O at 75 degrees C. Continued heating at 75 degrees C leads to distintegration of the exine ;s...
متن کاملPollen spectrum and risk of pollen allergy in central Spain.
The present work analyses the airborne pollen dynamic of the atmosphere of Toledo (central Spain), a World Heritage Site and an important tourist city receiving over 2 millions of visitors every year. The airborne pollen spectrum, the annual dynamics of the most important taxa, the influence of meteorological variables and the risk of suffering pollen allergy are analysed. Results of the presen...
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: American Journal of Botany
سال: 1921
ISSN: 0002-9122
DOI: 10.2307/2435552