title: [Effects of elevated atmospheric CO2 concentration on endogenous hormones in gingko leaves].
abstract: With top-opened chamber system, this paper studied the responses of endogenous hormones abscisic acid (ABA), indoleacetic acid (IAA), zeatin riboside (ZR) and gibberellins (GA3) in gingko leaves to elevated atmospheric CO2 concentration (ambient + 350 micromol x mol(-1), EC). The results showed that EC could decrease the ABA content. After treated with EC for 120 days, the ABA content could be decreased by 63.0%, in comparing with the control. EC could also decrease the contents of IAA and ZR, and the decrement could reach significant with the extension of the treatment. The IAA content was 2 times higher after 100 days treatment, and ZR content was 2.5 times higher after 80 days treatment than those of CK. Under EC, the peak of GA3 appeared earlier. The (IAA + GA3 + ZR)/ABA ratio decreased gradually with the growth of gingko, and was obviously higher than the control at later stage (after 40-60 days treatment), indicating that elevated atmospheric CO2 concentration could promote the growth and development of gingko.
authors: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. lxmls132@163.com
authors: Xue-Mei
authors: XM
authors: Li
authors: Xing-Yuan
authors: XY
authors: He
authors: Wei
authors: W
authors: Chen
authors: Shi-Lei
authors: SL
authors: Fu
authors: Li-Hong
authors: LH
authors: Zhang
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism; D000241:Adenosine / Q000031:analogs & derivatives / Q000378:metabolism; D000388:Air / Q000032:analysis*; D002245:Carbon Dioxide / Q000032:analysis*; D005875:Gibberellins / Q000378:metabolism; D020441:Ginkgo biloba / Q000378:metabolism*; D007541:Isopentenyladenosine / Q000031:analogs & derivatives / Q000378:metabolism; D010937:Plant Growth Regulators / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism
chemical_list: D005875:Gibberellins; D010937:Plant Growth Regulators; D002245:Carbon Dioxide; D000040:Abscisic Acid; D007541:Isopentenyladenosine; C009699:zeatin riboside; D000241:Adenosine