Pollen tubes lacking a pair of K+ transporters fail to target ovules in Arabidopsis.

@article{Lu2011PollenTL,
  title={Pollen tubes lacking a pair of K+ transporters fail to target ovules in Arabidopsis.},
  author={Yongxian Lu and Salil Chanroj and Lalu Zulkifli and Mark A Johnson and Nobuyuki Uozumi and Alice Y. Cheung and Heven Sze},
  journal={The Plant cell},
  year={2011},
  volume={23 1},
  pages={
          81-93
        }
}
Flowering plant reproduction requires precise delivery of the sperm cells to the ovule by a pollen tube. Guidance signals from female cells are being identified; however, how pollen responds to those cues is largely unknown. Here, we show that two predicted cation/proton exchangers (CHX) in Arabidopsis thaliana, CHX21 and CHX23, are essential for pollen tube guidance. Male fertility was unchanged in single chx21 or chx23 mutants. However, fertility was impaired in chx21 chx23 double mutant… CONTINUE READING

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