Pollen Production in Some Anemophilous Angiosperms
نویسندگان
چکیده
منابع مشابه
Region-Specific Sensitivity of Anemophilous Pollen Deposition to Temperature and Precipitation
Understanding relations between climate and pollen production is important for several societal and ecological challenges, importantly pollen forecasting for pollinosis treatment, forensic studies, global change biology, and high-resolution palaeoecological studies of past vegetation and climate fluctuations. For these purposes, we investigate the role of climate variables on annual-scale varia...
متن کاملCalcium gradients in conifer pollen tubes; dynamic properties differ from those seen in angiosperms.
Pollen tubes are an established model system for examining polarized cell growth. The focus here is on pollen tubes of the conifer Norway spruce (Picea abies, Pinaceae); examining the relationship between cytosolic free Ca2+, tip elongation, and intracellular motility. Conifer pollen tubes show important differences from their angiosperm counterparts; they grow more slowly and their organelles ...
متن کاملExtra-gynoecial pollen-tube growth in apocarpous angiosperms is phylogenetically widespread and probably adaptive.
• Fusion of floral carpels (syncarpy) in angiosperms is thought to have allowed for significant improvements in offspring quantity and quality in syncarpous species over gymnosperms and apocarpous (free-carpelled) angiosperms. Given the disadvantages of apocarpy, it remains an evolutionary puzzle why many angiosperm lineages with free carpels (apocarpy) have been so successful and why some line...
متن کاملChromosomes of some argentine angiosperms and their taxo - nomic
Meiotic or mitotic chromosomes of eleven species of angiosperms native in Argentina, belonging to seven families, were studied in order to be used in cytotaxonomic studies and gain some insights on the evolutive relationships of the different groups. Most of our data were the first cytological information for the species. The genus Alvaradoa Liebm. was investigated cytologically for the first t...
متن کاملPollen: Production, Nutrition and Health: A Review
The old Egyptians describe pollen as "a life-giving dust." Pollen and its nutritional value is still surrounded by mysteries. It is called the only perfectly complete food. The consumption of plant producing seed, the pollen, is praised in the Bible, Genesis 1:29: And God said, See, I have given you every plant producing seed, on the face of all the earth, and every tree which has fruit produci...
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: Grana
سال: 1986
ISSN: 0017-3134,1651-2049
DOI: 10.1080/00173138609429933