01875nas a2200217   4500008004100000245010700041210006900148260016800217300001200385490000600397520103300403653001901436653001101455653001901466653002001485653001401505653001001519653001501529100001601544856009701560       2002                        eng d00aInfluence of ultra-high carbon dioxide levels on growth and morphogenesis of Lamiaceae species in soil0 aInfluence of ultrahigh carbon dioxide levels on growth and morph  aAffiliation: USDA, Natl. Ctr. Agricultur. Utiliz. Res., Ferment. Biochemistry Research Unit, 1815 North University Street, Peoria, IL 61604, United Statesc2002///  a81 - 890 v93 aThe growth and morphogenesis of spearmint (Mentha spicata L.), thyme (Thymus vulgaris L.), and water mint (Mentha aquatica L.) were determined after four weeks under various levels of CO2. Those plants grown in a greenhouse in ultra-high CO2 levels (≥3,000 μl CO2/liter) had increased fresh weight, and leaf, root, and shoot numbers as compared with plants grown under the same conditions in ambient air or in high CO2 levels (7,500 μl CO2/liter). For example, fresh weight of spearmint and water mint increased 150 and 220 percent, respectively, under 10,000 μl CO2/liter as compared with growth under 350 μl CO2/liter. Thyme fresh weight increased 160 percent under 3,000 μl CO2/liter as compared with growth under ambient air. Shoot cultures given an elevated CO2 (10,000 μl CO2/liter) pretreatment invariably exhibited higher rates of growth and morphogenesis upon transfer to soil as compared with shoots pretreated with ambient air, regardless if the plant was subsequently grown in ambient or elevated CO2 levels.10aCO2 enrichment10aGrowth10aRoot formation10aShoot formation10aSpearmint10aThyme10aWater mint1 aTisserat, B  uhttp://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-0036200944&partnerID=40&rel=R6.5.0