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Trends in Biosciences
Year : 2011, Volume : 4, Issue : 2
First page : ( 222) Last page : ( 223)
Print ISSN : 0974-8431. Online ISSN : 0976-2485.

Effect of developmental stage and plant spacing on artemisinin and essential oil yield in Artemisia annua Plants

Tiwari Sugandha

Department of Botany, D.G. College, C.S.J.M. University, Kanpur. e-mail: sugandhatiwari7@gmail.com

Online published on 12 March, 2012.

Received:  14  October,  2011; Accepted:  20  November,  2011.


The study was undertaken to assess the effect of plant density and plant age on artemisinin content in antimalarial plant A. annua. Treatment consisted of five planting densities (12500, 20825, 41650, 62500 and 83300 plants/hectare) with four replicates. Observations were taken for plant height and artemisinin content in the months of June (180 days old plants), July (210 days old plants) and August (240 days old plants) when the plants were in vegetative stage. Maximum artemisinin content was recorded in the samples harvested in the month of July (210 days old plants) which later declined in the samples harvested in the month of August (240 days old plants) in all the planting densities tested. Maximum artemisinin content was recorded in planting density of 41,650 plants per hectare with plant to plant spacing of 50 cm X 30 cm. Essential oil was estimated in 210 days old plants in the month of July. Highest essential oil yield was obtained in the planting density of 20,825 plants per hectare with plant to plant spacing of 50cm X 80cm.



Plant density, Plant height, Plant age, Malaria.


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