The Production of Cytokinin, Abscisic Acid and Auxin by CAM Orchid Aerial Roots

Aerial roots of two monopodial thick-leaved epiphytic orchids (Aranda and Vanda) are a poßible source of endogenous plant hormones (abscisic acid, cytokinins, indole-3-acetic acid). Using a monoclonal antibody-based immunoaßay, this study also revealed that the levels of plant hormones in root tips...

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Bibliographic Details
Published in:Journal of plant physiology 1995-01, Vol.147 (3), p.371-377
Main Authors: Zhang, N.G., Yong, T.W.H., Hew, C.S., Zhou, X.
Format: Article
Language:English
Subjects:
ABA
abscisic acid
ADVENTITIOUS ROOTS
aerial roots
AIA
ARANDA
AUXINAS
AUXINE
AUXINS
Biological and medical sciences
CAM
CAM PATHWAY
CICLO CAM
CITOQUININAS
cytokinin
CYTOKININE
CYTOKININS
EPIFITAS
EPIPHYTE
EPIPHYTES
Fundamental and applied biological sciences. Psychology
Growth regulators
HORMONAS
HORMONE
HORMONES
IAA
indole-3-acetic acid
Luftwurzel
Metabolism
Miß Joaquim
Noorah Alsagoff
orchid
ORCHIDACEAE
Orchidee
Pflanzenhormon
PLANT GROWTH SUBSTANCES
Plant physiology and development
RACINE
RACINE ADVENTIVE
RAICES
RAICES ADVENTICIAS
ROOTS
SUBSTANCE DE CROISSANCE VEGETALE
SUSTANCIAS DE CRECIMIENTO VEGETAL
VANDA
VOIE DU METABOLISME CAM
Wurzelspitze
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Summary:Aerial roots of two monopodial thick-leaved epiphytic orchids (Aranda and Vanda) are a poßible source of endogenous plant hormones (abscisic acid, cytokinins, indole-3-acetic acid). Using a monoclonal antibody-based immunoaßay, this study also revealed that the levels of plant hormones in root tips of Aranda could vary with root position along the stem, time and growth stages. The levels of plant hormones are usually higher in root tips than elsewhere in the roots. Higher levels of cytokinin (mainly isopentenyladenosine) were detected in root tips of flowering plants than in non-flowering plants of Aranda. Lateral aerial roots(s) could be induced by the removal of root tip. A poßible role for these rootderived plant hormones is discußed in relation to orchid growth and development.
ISSN:0176-1617
1618-1328
DOI:10.1016/S0176-1617(11)82170-X