title: Auxin and cytoskeletal organization in algae.
abstract: Hormones affect growth and alter the cytoskeleton suggesting that hormones and the cytoskeleton interact with each other. The cytoskeleton of ancestral algae such as Chara showed similar sensitivity to auxin as higher plants, even in generative structures but the sensitivity differed between IAA and alpha-NAA and presumably other auxins. The ability of cells to elongate depends on microtubule organization during the transition from disorganized to perpendicular to longitudinal organization of the cytoskeleton. Because of the many functions of the cytoskeleton it is possible that its composition is influenced by selective gene expression and adaptation to growth regulators. Co-localization of microtubules and F-actin change at a high temporal and spatial scale. High resolution measurements of mRNA expression indicate rapid turnover that may affect the composition of the cytoskeleton.
authors.affiliation: Biology Department, University of Louisiana, Lafayette, LA 70504-2451, USA.
authors.forename: Qiaojun
authors.initials: Q
authors.lastname: Jin
authors.forename: Peter
authors.initials: P
authors.lastname: Scherp
authors.forename: Kirsten
authors.initials: K
authors.lastname: Heimann
authors.forename: Karl H
authors.initials: KH
authors.lastname: Hasenstein
mesh_terms: D044784:Chara / Q000166:cytology*; D000460:Chlorophyta / Q000166:cytology*; D020869:Gene Expression Profiling; D007150:Immunohistochemistry; D007210:Indoleacetic Acids / Q000494:pharmacology*; D008870:Microtubules / Q000187:drug effects* / Q000378:metabolism; D009280:Naphthaleneacetic Acids / Q000494:pharmacology*; D010937:Plant Growth Regulators / Q000494:pharmacology*
chemical_list: D007210:Indoleacetic Acids; D009280:Naphthaleneacetic Acids; D010937:Plant Growth Regulators; C034182:1-naphthaleneacetic acid; C030737:indoleacetic acid