Figure 14 - uploaded by Paul Covey
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Early pollen tube development in tomato Early pollen tube growth starts with hydration and formation of the glebula (0 -10 min) and ends when an established pollen tube (90 min) is formed. Pollen tube growth can escape the effects of PRALF up to the transition from constant growth to oscillating growth (20 min). This is also the time the male germ unit (MGU) migrates into the tube. Tubes are sensitive to PRALF between 20 and 60 minutes (Window of PRALF sensitivity). Pollen tubes begin to become insensitive to PRALF starting around 50 min and are completely insensitive at 90 minutes.
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