Root cross section (30 μm) of Penstemon venustus. Lignified tissue is stained reddish using Phloroglucinol/HCL. Black markers denote annual ring borders. Individual collected at the Wallowa Mts., Oregon, USA (2003)Root cross section (30 μm) of Cirsium spinosissimum. Lignified tissue is stained reddish using Phloroglucinol/HCL. Black markers denote annual ring borders. Individual collected in the Churfirsten Mountain range, Switzerland (2002)Root cross section (30 μm) of Silene vulgaris. Lignified tissue is stained reddish using Phloroglucinol/HCL. Black markers denote annual ring borders. Individual collected at Davos, Switzerland (2003)
Herbchronology is the analysis of annual growth rings (or simply annual rings) in the secondary root xylem of perennial herbaceous plants. While leaves and stems of perennial herbs die down at the end of the growing season the root often persists for many years or even the entire life.[1] Perennial herb species belonging to the dicotyledon group (also known as perennial forbs) are characterized by secondary growth, which shows as a new growth ring added each year to persistent roots. About two thirds of all perennial dicotyledonous herb species with a persistent root that grow in the strongly seasonal zone of the northern hemisphere show at least fairly clear annual growth rings.[1]
Counting of annual growth rings can be used to determine the age of a perennial herb similarly as it is done in trees using dendrochronology.[2] This way it was found that some perennial herbs live up to 50 years and more.[3][4]
^ abDietz H, Schweingruber FH (2002). "Annual rings in native and introduced forbs of lower Michigan, USA". Canadian Journal of Botany. 80 (6): 642–649. doi:10.1139/b02-048.
^von Arx G, Dietz H (2006). "Growth rings in the roots of temperate forbs are robust annual markers". Plant Biology. 8 (2): 224–233. Bibcode:2006PlBio...8..224A. doi:10.1055/s-2005-873051. PMID 16547867. S2CID 17849550.
^Schweingruber FH, Poschlod P (2005). "Growth rings in herbs and shrubs: life span, age determination and stem anatomy". Forest Snow and Landscape Research. Bern: Haupt: 195–415. ISSN 1424-5108.
^von Arx G, Edwards PJ, Dietz H (2006). "Evidence for life history changes in high altitude populations of three perennial forbs". Ecology. 87 (3): 665–674. Bibcode:2006Ecol...87..665V. doi:10.1890/05-1041. PMID 16602296. S2CID 26567998.
Herbchronology is the analysis of annual growth rings (or simply annual rings) in the secondary root xylem of perennial herbaceous plants. While leaves...
Herbaceous plant – Plant that has no persistent woody stem above ground Herbchronology Perennial grain – Grain crops that remain productive for two or more...
lakes. The age of some herbaceous perennial plants can be determined by herbchronology, the analysis of annual growth rings in the secondary root xylem. Herbaceous...
Dendrochronology Electron spin resonance dating Fission track dating Geochronology Herbchronology Iodine–xenon dating Potassium–argon dating Lead–lead dating Luminescence...
extend the calibration on annual tree rings until ≈13 900 cal yr BP." Herbchronology is the analysis of annual growth rings (or simply annual rings) in the...
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