NDLI: Tissue proliferation condition in micropropagated ericaceous plants

Content Provider	Springer Nature Link
Author	Brand, Mark H.
Copyright Year	2010
Abstract	Tissue proliferation (TP) is an abnormal tumor-like growth produced at or near the crown of the plant, but may also be found on aerial plant parts of some genotypes. Basal tumors may or may not be accompanied by proliferation of compact shoots with short internodes and a whorled leaf arrangement. Genera exhibiting TP include Rhododendron, Kalmia and Pieris of the Ericaceae family. Development of TP symptoms in a plant is highly correlated to a history of micropropagation and also to genetic background of the genotype. Similarities of TP symptoms to crown gall caused by Agrobacterium tumefaciens led many to initially believe TP to be a form of crown gall, but all evidence suggests that a pathogen is not involved in the TP disorder. Abnormal lignotuber formation is another possible cause for TP for which little supportive evidence could be developed. An epigenetic condition, possibly cytokinin habituation, is the possible cause of TP that is best supported by the majority of research evidence. It is likely that TP is induced in vitro by adventitious shoot formation, resulting from high cytokinin concentrations used to rapidly proliferate shoots. Some nursery production practices may result in increased TP symptoms development post-propagation. TP is well managed now due to greater awareness and adoption of sound micropropagation practices for ericaceous plants by tissue culture labs.
Starting Page	131
Ending Page	136
Page Count	6
File Format	PDF
ISSN	01676903
Journal	Plant Growth Regulation
Volume Number	63
Issue Number	2
e-ISSN	15735087
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-10-21
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Epigenetic Habituation Tumor Rhododendron Tissue culture Somaclonal variation Plant Anatomy/Development Plant Physiology Agriculture Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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