title: Intraseasonal carbon sequestration and allocation in larch trees growing on permafrost in Siberia after13C labeling (two seasons of 2013-2014 observation).
abstract: This research is an attempt to study seasonal translocation patterns of photoassimilated carbon within trees of one of the high latitudes widespread deciduous conifer species Larix gmelinii (Rupr. Rupr). For this purpose, we applied whole-tree labeling by13CO2, which is a powerful and effective tool for tracing newly developed assimilates translocation to tissues and organs of a tree. Experimental plot has been established in a mature 105-year-old larch stand located within the continuous permafrost area near Tura settlement (Central Siberia, 64°17'13″N, 100°11'55″E, 148 m a.s.l.). Measurements of seasonal photosynthetic activity and foliage parameters (i.e., leaf length, area, biomass, etc.), and sampling were arranged from early growing season (June 8, 2013; May 14, 2014) until yellowing and senescence of needles (September 17, 2013; September 14, 2014). Labeling by13C of the tree branch (June 2013, for 3 branch replicates in 3 different trees) and the whole tree was conducted at early (June 2014), middle (July 2014), and late (August 2013) phase of growing season (for different trees in 3 replicates each time) by three pulses [(CO2)max = 3000-4000 ppmv,13CO2(30 % v/v)]. We found at least two different patterns of carbon translocation associated with larch CO2assimilation depending on needle phenology. In early period of growing season (June),13C appearing in newly developed needles is a result of remobilized storage material use for growth purposes. Then approximately at the end of June, growth processes is switching to storage processes lasting to the end of growing season.
authors.affiliation: V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russian Federation. oxanamas@mail.ru.
authors.forename: Oxana
authors.identifier: http://orcid.org/0000-0002-0768-3049
authors.initials: O
authors.lastname: Masyagina
authors.affiliation: V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russian Federation.
authors.forename: Anatoly
authors.initials: A
authors.lastname: Prokushkin
authors.affiliation: V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russian Federation.
authors.forename: Alexander
authors.initials: A
authors.lastname: Kirdyanov
authors.affiliation: NRC Kurchatov Institute, Moscow, Russian Federation.
authors.forename: Aleksey
authors.initials: A
authors.lastname: Artyukhov
authors.affiliation: NRC Kurchatov Institute, Moscow, Russian Federation.
authors.forename: Tatiana
authors.initials: T
authors.lastname: Udalova
authors.affiliation: NRC Kurchatov Institute, Moscow, Russian Federation.
authors.forename: Sergey
authors.initials: S
authors.lastname: Senchenkov
authors.affiliation: SRC Planeta, Moscow, Russian Federation.
authors.forename: Aleksey
authors.initials: A
authors.lastname: Rublev
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism; D002247:Carbon Isotopes / Q000378:metabolism; D057965:Carbon Sequestration; D028221:Larix / Q000254:growth & development / Q000378:metabolism*; D065946:Permafrost; D010788:Photosynthesis; D018515:Plant Leaves / Q000254:growth & development / Q000378:metabolism; D012621:Seasons; D012800:Siberia
chemical_list: D002247:Carbon Isotopes; D002245:Carbon Dioxide
keywords: 13C; Larix; Permafrost; Photoassimilation; Stable isotopes