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Establishment Of Polarity During Organization Of The Acentrosomal Plant Cortical Microtubule Array, Ram Dixit, Eric Chang, Richard Cyr
Establishment Of Polarity During Organization Of The Acentrosomal Plant Cortical Microtubule Array, Ram Dixit, Eric Chang, Richard Cyr
Biology Faculty Publications & Presentations
The plant cortical microtubule array is a unique acentrosomal array that is essential for plant morphogenesis. To understand how this array is organized, we exploited the microtubule (+)-end tracking activity of two Arabidopsis EB1 proteins in combination with FRAP (fluorescence recovery after photobleaching) experiments of GFP-tubulin to examine the relationship between cortical microtubule array organization and polarity. Significantly, our observations show that the majority of cortical microtubules in ordered arrays, within a particular cell, face the same direction in both Arabidopsis plants and cultured tobacco cells. We determined that this polar microtubule coalignment is at least partially due to a …