pollinium


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pollinium

a mass of POLLEN GRAINS stuck together and carried as a whole during POLLINATION.
References in periodicals archive ?
On withdrawing the pencil, a pollinium was stuck to it, with the stalk straight up.
Anther flaps from the recipient flower were gently splayed so that a pollinium could be inserted into the stigmatic chamber with its convex surface innermost.
Plants may receive 0 or 1 pollinium and may disperse 0, 1, or 2 pollinia.
Subtraction of the number of pollinia removals from the number of pollinations indicated minimum pollinium losses ranged from 4% to 16%.
A projecting pollinium indicates that another connected pollinium is inserted in the chamber.
Angular transformations were applied to percentage data (number of fruits matured per flower, number of successful pollinium dispersals per flower), as recommended by Sokal and Rohlf (1981).
In the first trend the pollinia produced by one flank of an anther are closely adpressed to one another (as noted above for some Periplocoideae as well), thereby giving the impression that each anther produces only one pollinium on either side and that each corpuscle thus has only two pollinia attached to it.
Because hundreds of pollen grains are dispersed in each milkweed pollinium, we predict that pollen-mediated gene flow should be high between populations, as dispersal of a single pollinium can result in the maturation of a large multiseeded fruit.
Because pollination is likely only during attempted copulation when the thorax is aligned with the floral column (bearing the orchid's pollinium and stigma), we analyzed the results for the number of pseudocopulations alone.