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The occurrence of estrogens in relation to reproductive processes in flowering plants

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Estrogens, a group of steroidal sex hormones, were determined in pollen, styles or whole pistils using a highly sensitive and specific radioimmunoassay (RIA) and found to be present at levels between 10−11 and 10−10 g/g FW. In the style of Liliun davidii Duch., the levels of total estrogen decreased after self-pollination of the open flower. After bud pollination, which partly overcame incompatibility, the levels of both estradiol and total estrogen increased. The levels of estradiol and total estrogen in the pistils of Brassica pekinensis Rupr. increased after compatible pollination during the first 3 days following pollination and decreased thereafter when the data were expressed on a FW basis. These results suggest that estrogens are to some extent associated with the reproductive processes.

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Correspondence to T. H. Tsao.

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Zhang, J., Yang, Z. & Tsao, T.H. The occurrence of estrogens in relation to reproductive processes in flowering plants. Sexual Plant Reprod 4, 193–196 (1991). https://doi.org/10.1007/BF00190004

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Key words

  • Estradiol
  • Estrogens
  • Pollination
  • Radioimmunoassay
  • Lilium
  • Brassica