Abstract：
:Root fluorescence is a phenomenon in which roots of seedlings fluoresce when irradiated with ultraviolet (UV) light. Soybean (Glycine max) and rye grass (Elymus glaucus) are the only plant species that have been reported to exhibit this occurrence in germinating seedling roots. The trait has been useful as a marker in genetic, tissue culture and diversity studies, and has facilitated selection of plants for breeding purposes. However, the biological significance of this occurrence in plants and other organisms is unknown. Here we report that the Andean tuber crop species Oxalis tuberosa, known as oca in the highlands of South America, secretes a fluorescent compound as part of its root exudates. The main fluorescent compounds were characterized as harmine (7-methoxy-1-methyl-beta-carboline) and harmaline (3, 4-dihydroharmine). We also detected endogenous root fluorescence in other plant species, including Arabidopsis thaliana and Phytolacca americana, a possible indication that this phenomenon is widespread within the plant kingdom.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Bais HP,Park SW,Stermitz FR,Halligan KM,Vivanco JMdoi
10.1016/s0031-9422(02)00235-2subject
Has Abstractpub_date
2002-11-01 00:00:00pages
539-43issue
5eissn
0031-9422issn
1873-3700pii
S0031942202002352journal_volume
61pub_type
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