HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

What's this?

This Article Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Web of Science (4) Citing Articles via Google Scholar Google Scholar Articles by Jacobs, W. P. Search for Related Content PubMed Articles by Jacobs, W. P. Agricola Articles by Jacobs, W. P. Social Bookmarking                            What's this?

Hormone transport and action in the green shoot:long-term studies of a clonal stock of Coleus blumei(Labiatae)¹

^a Biology Department,Princeton University, Princeton, New Jersey 08544

A decades-long study of hormone production, transport, developmentalactions, and hormonal interactions in the green shoots of mature plantshas exploited a clone of Coleus blumei. To obtain data bothquantitative and reproducible, we greatly increased sample size over theclassical anatomical models, initiated round-the-clock collections, andcountered that increased workload by clearing and staining organs ratherthan by embedding and serially sectioning them. Major developmentalevents occurred at night. The control of the normal differentiation andregeneration of tracheary cells and sieve-tube members byindole-3-acetic acid (IAA) and cytokinins and of fibers by IAA andgibberellic acid have been major findings from this approach. IAA fromthe leaf blade controls the timing of leaf abscission. As the leafages, the ability of the petiole to transport IAA from the blade to theabscission zone declines, with abscisic acid (ABA) decreasing IAAtransport down the petiole and concomitantly increasing the conjugationof IAA with aspartic acid. Evidence for transport barriers was found atnodes and abscission zones.

Key Words: abscisicacid • abscission • Coleusblumei; • cytokinins • fibers • gibberellicacid • indole-3-aceticacid • Labiatae • transport • vascularcells

CiteULike    Complore    Connotea    Del.icio.us    Digg    Facebook    Reddit    Technorati    Twitter    What's this?