iridoids and raubasine

iridoids has been researched along with raubasine* in 2 studies

Other Studies

2 other study(ies) available for iridoids and raubasine

Article	Year
Precursor limitations in methyl jasmonate-induced Catharanthus roseus cell cultures. Plant cell reports, 2006, Volume: 25, Issue:6 Jasmonates enhance the expression of various genes involved in terpenoid indole alkaloid (TIA) biosynthesis in Catharanthus roseus. We applied precursor feeding to our C. roseus suspensions to determine how methyl jasmonate (MJ) alters the precursor availability for TIA biosynthesis. C. roseus suspensions were induced with MJ (100 microM) on day 6 and fed loganin (0.30 mM), tryptamine (0.15 mM), loganin plus tryptamine, or geraniol (0.1-1.0 mM) on day 7. While MJ increased ajmalicine production by 3-fold, induced cultures were still limited by terpenoid precursors. However, both induced and non-induced cultures became tryptamine-limited with excess loganin. Geraniol feeding also increased ajmalicine production in non-induced cultures. But MJ appeared to increase geraniol availability in induced cultures, due presumably to the increased expression of Dxs with MJ addition. Topics: Acetates; Acyclic Monoterpenes; Catharanthus; Cells, Cultured; Cyclopentanes; Iridoids; Oxylipins; Secologanin Tryptamine Alkaloids; Terpenes; Tryptamines	2006
2,4-D and alkaloid accumulation in periwinkle cell suspensions. Biochimie, 1994, Volume: 76, Issue:5 Omission of 2,4-D from culture medium during one subculture of Catharanthus roseus cells, strain C20, resulted in an increased alkaloid accumulation, without effect on growth. Alkaloid accumulation, rather than growth, seemed to be more sensitive to 2,4-D. 2,4-D inhibited alkaloid accumulation essentially during growth phase, but its inhibitory effect during this period was partially reversible. As this reversibility was underlined only during the stationary phase, this suggested that this action could be situated upstream in a terpenoid non-specific pathway. 2,4-D feeding showed that inhibition is weaker and weaker as the alkaloid accumulation period proceeds. Auxin action during this period could take place downstream in specific alkaloid pathways. The lower alkaloid accumulation obtained after loganic acid feeding compared to that obtained with secologanin and loganin could indicate that loganic acid methylation should be one of the 2,4-D target(s). Topics: 2,4-Dichlorophenoxyacetic Acid; Cells, Cultured; Glucosides; Iridoid Glucosides; Iridoids; Plants, Medicinal; Pyrans; Secologanin Tryptamine Alkaloids; Vinca Alkaloids; Yohimbine	1994

Article

Year

Precursor limitations in methyl jasmonate-induced Catharanthus roseus cell cultures.

Plant cell reports, 2006, Volume: 25, Issue:6

Jasmonates enhance the expression of various genes involved in terpenoid indole alkaloid (TIA) biosynthesis in Catharanthus roseus. We applied precursor feeding to our C. roseus suspensions to determine how methyl jasmonate (MJ) alters the precursor availability for TIA biosynthesis. C. roseus suspensions were induced with MJ (100 microM) on day 6 and fed loganin (0.30 mM), tryptamine (0.15 mM), loganin plus tryptamine, or geraniol (0.1-1.0 mM) on day 7. While MJ increased ajmalicine production by 3-fold, induced cultures were still limited by terpenoid precursors. However, both induced and non-induced cultures became tryptamine-limited with excess loganin. Geraniol feeding also increased ajmalicine production in non-induced cultures. But MJ appeared to increase geraniol availability in induced cultures, due presumably to the increased expression of Dxs with MJ addition.

Topics: Acetates; Acyclic Monoterpenes; Catharanthus; Cells, Cultured; Cyclopentanes; Iridoids; Oxylipins; Secologanin Tryptamine Alkaloids; Terpenes; Tryptamines

2006

2,4-D and alkaloid accumulation in periwinkle cell suspensions.

Biochimie, 1994, Volume: 76, Issue:5

Omission of 2,4-D from culture medium during one subculture of Catharanthus roseus cells, strain C20, resulted in an increased alkaloid accumulation, without effect on growth. Alkaloid accumulation, rather than growth, seemed to be more sensitive to 2,4-D. 2,4-D inhibited alkaloid accumulation essentially during growth phase, but its inhibitory effect during this period was partially reversible. As this reversibility was underlined only during the stationary phase, this suggested that this action could be situated upstream in a terpenoid non-specific pathway. 2,4-D feeding showed that inhibition is weaker and weaker as the alkaloid accumulation period proceeds. Auxin action during this period could take place downstream in specific alkaloid pathways. The lower alkaloid accumulation obtained after loganic acid feeding compared to that obtained with secologanin and loganin could indicate that loganic acid methylation should be one of the 2,4-D target(s).

Topics: 2,4-Dichlorophenoxyacetic Acid; Cells, Cultured; Glucosides; Iridoid Glucosides; Iridoids; Plants, Medicinal; Pyrans; Secologanin Tryptamine Alkaloids; Vinca Alkaloids; Yohimbine

1994