The geometry of elongating plant cells
1993
Korn, R.W.
Shape and size of elongating cells were examined in three plant tissues: the adaxial epidermis of the petiole of Zebrina pendula L., the abaxial epidermis of Anacharis densa L. leaves and the abaxial epidermis of the scale leaf of Allium cepa L. Based on a few simple assumptions, the expected probability distribution frequencies (pdf) for cell length and number of adjacent walls were calculated. Actual data of cell lengths closely approximated those expected with the pdfs being asymmetrical since there are more younger, shorter cells than older, longer cells. Data for number of lateral walls of real cells were similar to that expected and these walls increase in number exponentially with age, also as expected. Several lines of evidence suggest a compensating mechanism exists to maintain a constant range of cell lengths through many cell generations. It is expressed by longer than average new daughter cells dividing relatively soon while shorter than average new daughter cells divide after a relatively long cycle.
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