..., NO is generated in pollen tubes (PTs) and affects intracellular responses through the modulation of Ca 2+ signaling, actin organization, vesicle trafficking and cell wall deposition, bearing consequences in pollen-stigma interactions and PT guidance. In contrast, the NO-responsive proteins that mediate...

... between the male and female gametophyte. We report here molecular data on one of the key events underpinning this process – the death of the receptive synergid cell and the coincident bursting of the pollen tube inside the ovule to release the sperm. We show that two REM transcription factors, VALKYRIE...

... and female tissues. In angiosperms, molecular mechanisms have recently been revealed that are crucial for the dialog between male (pollen tube) and female gametophytes required for successful sperm delivery. When pollen tubes reach the female gametophyte, they arrest growth, burst and discharge their sperm...

... anthers continue to synthesize DNA, and at the time of pollination, contain approximately 1.5C DNA. Following pollination, sperm continue through the S phase of the cell cycle during pollen tube growth. By the time pollen tubes reach the ovary, sperm nuclei contain approximately 1.75C DNA. Just prior...