Analysis of lateral root growth in Arabidopsis in response to physiologically active auxin analogues.

Thu, 03/03/2011 - 14:09 — Virgilija Gaveliene

Publication Type:

Journal Article

Authors:

Novickiene, L.; Gaveliene, V.; Miliuviene, L.; Kazlauskiene, D.; Pakalniskyte, L.

Source:

Acta Agronomica Hungarica (Akadémiai Kiadó), , Volume 58, Issue 1, p.1-10 (2010)

Keywords:

Arabidopsis; alf4-1 mutant; auxin analogues; lateral root

Abstract:

 The aim of this work was to investigate the formation and development of lateral roots in model trials on Arabiidopsis thaliana L. Heynh wild type (Col-), the alf4-1 mutant and its allele by applying the physiologically active analogues IBA, IAA, Ta-12 and TA-14.

Differences were observed between the alf4-1 mutant its allele phenotype in the formation of lateral roots. The application of auxin analogues was unable to restore the formation of lateral roots in the alf4-1 mutant. In some cases, under the impact of IBA  cases, under the impact of IBA, a cluster of xylem cells was activated in the pericycle of the primary roots in the alf4-1 allele and the formation and growth of lateral roots. The impact of IBA,  TA-12 (1 mM) and IAA  was paricularly evident. THe intensive formation of lateral roots under the impact of IBA and TA-12 could be related with the ability of these compounds to intensify mitotic activity in the apical meristem cells of the lateral roots. New data were obtained, showing that IBA and other physiologically acive auxin analogues can modify the root system architecture of the test-plant Arabidopsis.