Uncoupling secretion and tip growth in lily pollen tubes: evidence for the role of calcium in exocytosis

  title={Uncoupling secretion and tip growth in lily pollen tubes: evidence for the role of calcium in exocytosis},
  author={Dipankar Roy and Holdaway-Clarke and Hackett and Kunkel and Lord and Hepler},
  journal={The Plant journal : for cell and molecular biology},
  volume={19 4},
Cytoplasmic calcium concentration ([Ca2+]i) and extracellular calcium (Ca2+o) influx has been studied in pollen tubes of Lilium longliflorum in which the processes of cell elongation and exocytosis have been uncoupled by use of Yariv phenylglycoside ((beta-D-Glc)3). Growing pollen tubes were pressure injected with the ratio dye fura-2 dextran and imaged after application of (beta-D-Glc)3, which binds arabinogalactan proteins (AGPs). Application of (beta-D-Glc)3 inhibited growth but not… CONTINUE READING


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