protandrous


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Related to protandrous: protogynous

protandrous

(prō-tăn′drəs)
adj.
Of or relating to an organism, especially a plant, in which the male reproductive organs mature before the female reproductive organs.

pro·tan′dry (-drē) n.

protandrous

  1. (of male gametes) ripening before the female gametes. Compare PROTOGYNOUS.
  2. (of plant flowers) possessing ANTHERS which ripen before the stigma is able to receive the pollen, thereby preventing SELF POLLINATION.
References in periodicals archive ?
Ultrastructural and in vitro steroidogenesis of the gonads in the protandrous clownfish.
Here, an opposing direction of selection acting on males may come to act: the reproductive benefit of protandrous males, which selects for small body size (Gotthard 2004; Stillwell et al.
ovalifoliolata, the flowers are weakly protandrous, produce considerable per cent of sterile pollen and present the capitate, wet papillate tri-lobed stigma above the stamens as in case of its allied species B.
Pregnant females of the parasite have the characteristic of presenting the posterior pleopods as the stylets of males, which indicates that they are protandrous hermaphrodites (Lemos de Castro, 1955), reaching the hosts as males, but after a short period of free life as juveniles, later transforming themselves into females in the gills or mouth (Eiras, 1994).
Many self-compatible species have special adaptations to prevent the automatic self-pollination, such as species herkogamous, protandrous and protogynous.
Female mating success and risk of pre-reproductive death in a protandrous grasshopper.
Flowers are produced over a terminal portion of the stalks, have pale blue tubular corollas (tube length 6-8 mm), and are hermaphroditic and protandrous.