self-pollination


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Related to self-pollination: cross-pollination
Self-incompatibilityclick for a larger image
Fig. 279 Self-incompatibility . The process depicted results in the progeny being S 1 /S3 and S2 /S3.

self-pollination

the transfer of pollen from the stamen of a flower either to the stigma of the same flower or to another flower on the same plant. Since self-pollination leads to self-fertilization which is a form of inbreeding, many plants have developed mechanisms to prevent its occurrence. For example, plants can be DIOECIOUS, show SELF-INCOMPATIBILITY, and have differential maturation times of male and female floral organs on the same plants (for example, see ARUM LILY). Compare CROSS-POLLINATION.
References in periodicals archive ?
The high fruit production in treatments with spontaneous self-pollination and manual self-pollination confirms that 'Bordo' cv.
Flowers within a plant were assigned to the following treatments: (1) agamospermy (flowers had their stigma removed at the beginning of anthesis); (2) autonomous self-pollination (un-manipulated bagged flowers); (3) hand self-pollination (flowers hand-pollinated with their own pollen); (4) hand cross-pollination (previously emasculated flowers hand-pollinated with pollen from another plant), and (5) natural pollination (un-manipulated and randomly selected flowers exposed to pollinators in the field).
The use of self-pollination to assist the selection of germination uniformity and increased emergence speed in passion fruit should be a goal of future studies.
This evidence becomes stronger because the manual self-pollination presented the second best rate of initial fruit set, implying the existence of a strong autogamy in this species.
These characteristics suggest that the tree species is adapted for crosspollination which is further substantiated by the lack of fruit set in manual self-pollination treatments.
The Self-compatibility and automatic self-pollination is a common phenomenon in many species of Fabaceae (BORGES, 2006; JACOBI et al.
Considering the discrepancy of this result with those of other studies and the fact that in evolutionary terms, self-pollination does not appear as a survival strategy, it can be hypothesized that this result may be associated with a deficiency in the attraction and the abundance or dispersal of pollinators.
However, production of achenes alone is not a good measure of reproductive success of Asteraceae, especially when flowers are self-pollinated, because a high percentage of achenes produced by self-pollination do not contain an embryo (Nielsen et al.
Considering the effect of self-pollination on the levels of soluble solids, the depression was more pronounced for the self obtained from SP88-869 and SP90-1314, while depression was null for the self-pollinations of CTC95-106, IAC91-2202, SP88-920, SP90-1501, SP90-1517, SP90-1616, SP91-3637, SP92-1583, SP94-3374, SP95-1005, SP95-3184, WI78455.
To the studied sunflower hybrids, determinations were performed in view to establish the flowering period and duration of this stage, the nectar secretion and sugar nectar concentration in view to calculate the potential honey yield, as well as the number of seeds per sunflower head isolated from insects and number of seeds per sunflower head free-pollinated in view to calculate the degree of self-pollination and to establish if there is a correlation between the self-pollination and the melliferous potential.
We performed the following five treatments: self-pollination, spontaneous self-pollination, geitonogamy, xenogamy and agamospermy.