Journal
PLANT AND CELL PHYSIOLOGY
Volume 41, Issue 8, Pages 932-939Publisher
JAPANESE SOC PLANT PHYSIOLOGISTS
DOI: 10.1093/pcp/pcd018
Keywords
cortical microtubule; gibberellin; Lemna minor; root elongation; uniconazole-P; taxol
Categories
Ask authors/readers for more resources
Hormonal control of elongation growth was analyzed in segments excised from the elongation zone of Lemna roots. Exogenous GA(3) did not promote the segment elongation but rather inhibited it. Uniconazole-P, a gibberellin biosynthesis inhibitor, significantly inhibited the segment elongation, and the inhibitory effect was completely nullified by GA(3). In the epidermis, cell elongation was inhibited, but lateral cell expansion was not affected by uniconazole-P. Orientation of cortical microtubules of epidermal cells was disturbed by treatment with uniconazole-P for 12 h, and the disorganization of cortical microtubules was ameliorated by GA(3). These findings suggested that disorganization of cortical microtubules induced inhibition of elongation growth of root. However, stabilization of cortical microtubules by taxol, a microtubule-stabilizing agent, did not affect the inhibition of segment elongation by uniconazole-P. These results suggested that endogenous gibberellin controls the elongation growth of root by regulating cell elongation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available