Pollen
61Pollen barrier — A physical obstacle that hinders the movement of pollen from a field of genetically modified (GM) crops to neighbouring non GM crops is called a pollen barrier. Such barriers are erected with the aim of reducing the out crossing of GM plants. In… …
62Pollen Baronets — The Pollen Baronetcy, of Redenham in the County of Southampton, is a title in the Baronetage of Great Britain. It was created on 15 May 1795 for John Pollen. The family descended from Edward Pollen (d. 1636), a London merchant originally of… …
63Pollen analysis — Analysis of the distribution of pollen grains of various species contained in surface layer deposits, especially peat bogs and lake sediments, from which a record of past climate may be inferred. Because the lake sediments accumulate over time, a …
64Pollen core — A pollen core is a core sample of a medium containing a stratigraphic sequence of pollen. Analysis of the type and frequency of the pollen in each layer is used to study changes in climate or land use using regional vegetation as a proxy. This… …
65pollen count — noun the number of pollen grains (usually ragweed) in a standard volume of air over a twenty four hour period and a specified time and place • Hypernyms: ↑count * * * noun, pl ⋯ counts [count] : a number that indicates the amount of pollen in the …
66pollen sac — noun : one of the sacs in a seed plant that contain the pollen and that are initially four in number but are commonly reduced to two by disintegration of the intervening walls in the mature anther * * * Bot. one of the cavities in an anther in… …
67pollen count — UK / US noun [countable] Word forms pollen count : singular pollen count plural pollen counts a measurement of how much pollen there is in the air at a particular time, often given on weather reports in the summer for people who are allergic to… …
68Pollen (film) — Pour les articles homonymes, voir Pollen. Pollen est un film documentaire américain de Louie Schwartzberg sorti en 2011. Sommaire 1 Synopsis 2 Fiche technique …
69pollen analysis — noun : the identification and determination of frequency of pollen grains in peat bogs and other preservative situations as a means of dating fossil and other remains : the study of past vegetations and climates as indicated by the pollen content …
70Pollen-presenter — A pollen presenter is an area on the tip of the style in flowers of plants of the family Proteaceae. In this family, the anthers are difficult of access for potential pollination vectors such as bees, birds and nectariferous mammals. To ensure… …
