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- W2018084837 abstract "Using pairs of pollen donors, I analyzed the growth of pollen tubes growing in different channels of the same style in Erythronium grandiflorum. After 24 hr the length of pollen tubes of randomly selected pollen donors was affected by the presence of other donors. The mean pollen tube lengths of donors did not differ when taken across all of the donor pairings, but in individual pairs, pollen from one donor was often significantly longer than pollen from the other donor when tested across several recipients. Pollen tube lengths were also consistently longer for pollen paired with pollen from the same donor than when paired with pollen from other donors, apparently because of mutual stimulation between the pollen populations from the same plant. In a second experiment, the amount of pollen tube attrition after five days of growth of pollen from a donor growing near (within 3 m) the recipient depended upon the source of other pollen growing in the same style. Local pollen experienced more attrition paired with self pollen than when paired with outcross pollen. Pollen from different outcross distances also modified the attrition of local pollen, but local pollen usually outcompeted pollen from greater distances. Since the growth of local pollen was modified depending upon the source of other pollen growing in the same style, it is probable that recipient styles are selectively inhibiting pollen tubes to produce the patterns of pollen tube interaction observed. The results from these two experiments indicate that the amount of attrition for pollen can be dependent on the composition of the pollen pool. Both direct pollen tube interactions and mediation by the stylar tissue appear to affect the growth rate and attrition of pollen in Erythronium." @default.
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- W2018084837 date "1990-01-01" @default.
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- W2018084837 title "POLLEN‐POLLEN AND POLLEN‐STYLE INTERACTIONS DURING POLLEN TUBE GROWTH IN ERYTHRONIUM GRANDIFLORUM (LILIACEAE)" @default.
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- W2018084837 doi "https://doi.org/10.1002/j.1537-2197.1990.tb13534.x" @default.
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