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.
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References in periodicals archive ?
However, it has previously been showed that Mikania micrantha was protandrous and had a secondary pollen presentation system which characterizes the family Asteraceae (Hong et al., 2008).
A protandrous male optimizes his chances to encounter females by mating early in the flight period (Zonneveld 1992).
This pattern has been reported in other places for other species including snappers, Pristipomoides filamentosus [40]; Aprion virescens and Etelis coruscans [39]; black breams, Acanthopagrus butcheri [41] and sharks, Acanthopagrus latus [42] who added a note that once a protandrous hermaphrodite fish has become a functional female, it remains a female throughout the rest of its life.
Corolla zygomorphic, 4.5-5 cm long, oblique relative to calyx, protandrous, infundibuliform; base gibbous, 6-7 mm in diameter, gibbosity 4-5.5 mm long; tube 3.5-4 cm long, 0.8-1.6 cm wide, outer surface white, sometimes pink ventrally, villous to lanate, inner surface white to yellow, glabrate; throat 9.5-16 mm in diameter, inner surface with dark red or purple spots, glandular trichomes dorsally; corolla lobes 5, subequal, spreading, white, apex rounded, ventral lobe 16-17 x 12-14 mm, oblong, margin slightly erose, glabrous, lateral lobes 8-13 x 9-10 mm, ovate to oblong, margin slightly erose, lanate abaxially, glabrous adaxially, dorsal lobes 8-10 x 8-11 mm, ovate, margin entire.
This fish is a protandrous hermaphrodite species (TAYLOR et al., 2000) that has been studied in the United States (YANES-ROCCA et al., 2009), Mexico (IBARRA-CASTRO et al., 2011) and Brazil (SOLIGO et al., 2011).
Passion fruit flowers are protandrous as anther dehisces before stigma become receptive, and stigma remains receptive from the time of flower opening to closing (Cox, 1957).
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.
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.