Water Stress Increases Alkaloid Concentrations in Threadleaf Groundsel (Senecio longilobus)
- 1 January 1982
- journal article
- research article
- Published by Cambridge University Press (CUP) in Weed Science
- Vol. 30 (1) , 106-108
- https://doi.org/10.1017/s0043174500026278
Abstract
The influence of water stress on toxic alkaloid concentrations in threadleaf groundsel (Senecio longilobus Benth.) was investigated in a controlled environment by monitoring leaf xylem water potential during a 32-day period, and then analyzing for alkaloid concentration by plant part. Total plant alkaloid concentration increased with increasing severity of water stress. The most severe water stress (−2.0 MPa) for the 32-day period increased alkaloid concentration by 4.6 times, compared to the least stress imposition (−1.0 MPa). Averaged across watering regimes, alkaloid concentrations (percent dry weight) were highest in threadleaf groundsel roots (0.088%) and occurred in similar concentrations in stems (0.046%) and leaves (0.050%). These results indicate the importance of considering the influence of plant water stress when investigating secondary plant compounds.Keywords
This publication has 13 references indexed in Scilit:
- Alkaloid Levels in Reed Canarygrass Grown on Wet Meadows in British ColumbiaJournal of Range Management, 1979
- Chemistry of toxic range plants. Determination of pyrrolizidine alkaloid content and composition in Senecio species by nuclear magnetic resonance spectroscopyJournal of Agricultural and Food Chemistry, 1979
- Alkaloid Levels in Phalaris aquatica L. as Affected by Environment 1Agronomy Journal, 1978
- Biological Significance of Reed Canarygrass Alkaloids and Associated Palatability Variation to Grazing Sheep and Cattle1Agronomy Journal, 1976
- Alkaloid-Bearing Plants: An Ecogeographic PerspectiveThe American Naturalist, 1976
- Metabolism and Function of Alkaloids in PlantsScience, 1974
- Alkaloids and Palatability of Phalaris arundinacea L. Grown in Diverse Environments 1Agronomy Journal, 1973
- Effects of time of day, moisture stress, and frosting on the alkaloid content of Phalaris tuberosaAustralian Journal of Agricultural Research, 1972
- Senecio Alkaloids: The Alkaloids of Senecio Douglasii, Carthamoides, Eremophilus, Ampullaceus and ParksiiJournal of the American Chemical Society, 1949
- Senecio Alkaloids: α- and β-Longilobine from Senecio longilobusJournal of the American Chemical Society, 1949