منابع مشابه
The mechanisms of pollination and fertilization in plants.
In flowering plants, pollen grains germinate to form pollen tubes that transport male gametes (sperm cells) to the egg cell in the embryo sac during sexual reproduction. Pollen tube biology is complex, presenting parallels with axon guidance and moving cell systems in animals. Pollen tube cells elongate on an active extracellular matrix in the style, ultimately guided by stylar and embryo sac s...
متن کاملMechanisms and evolution of deceptive pollination in orchids.
The orchid family is renowned for its enormous diversity of pollination mechanisms and unusually high occurrence of non-rewarding flowers compared to other plant families. The mechanisms of deception in orchids include generalized food deception, food-deceptive floral mimicry, brood-site imitation, shelter imitation, pseudoantagonism, rendezvous attraction and sexual deception. Generalized food...
متن کاملResponse to Viola Schiaffonati
Her comments on my work cover a rich variety of topics. I won't try to comment on everything she has to say, but she has focused on a number of issues that I have also thought about and think are important. Broadly speaking we do agree, I believe, about the role of models in the philosophy of science and also in various parts of science as well. I have several comments, so I will highlight each...
متن کاملPollination
Berry formation is the process of ovary conversion into a functional fruit, and is characterized by abrupt changes in the content of several phytohormones, associated with pollination and fertilization. Much effort has been made in order to improve our understanding of berry development, particularly from veraison to post-harvest time. However, the period of berry formation has been poorly inve...
متن کاملPollination and Fruit Set: Pollination Requirement
Considerable infonnation has been developed on floral induction and the flowering process in Citrus in the papers which precede this one. Flower induction is a prerequisite to fruit production, so it is very important to have a clear understanding ofthe process. However, simply producing large numbers offlowers does not necessarily guarantee a subsequent large crop of fruit to harvest when they...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1971
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1971.tb02533.x