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首页> 外文期刊>Nordic Journal of Botany >Eco-physiological potential of jack pine (Pinus banksiana) forassisted northward migration: interactions among photoperiod,[CO2] and moisture stress
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Eco-physiological potential of jack pine (Pinus banksiana) forassisted northward migration: interactions among photoperiod,[CO2] and moisture stress

机译：Eco-physiological杰克松(松果体的潜力banksiana) forassisted向北迁移:光周期之间的交互,二氧化碳和水分压力

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Climate change will cause northward shifts of climate envelopes for boreal plants, however, the different photoperiod andsoil moisture regimes at higher latitudes will likely influence the success of species migrations (natural and assisted). Theobjective of this study was to assess the effects of photoperiod regime and its interactions with soil moisture and carbondioxide concentration ([CO2]) on the morpho-physiological processes in jack pine Pinus banksiana. One-year old seedlingswere exposed to two [CO2] (400 and 950 mmol mol–1), two soil moistures (60–70% and 30–40% of field water capacity)and three photoperiod regimes (photoperiods at seed origin, 5° and 10° north of the seed origin) in environment controlledgreenhouses. The impacts of photoperiod, soil moisture and elevated [CO2] on growth and physiological processes in theseedlings were examined. The results suggest that the response of jack pine to climate change will be complex under theinteractive effects of northward migration associated longer photoperiod, soil moisture stress and elevated [CO2]. Thelonger photoperiod associated with higher latitudes under elevated [CO2] significantly advanced the budburst at bothhigh and low soil moisture regimes, which may likely increase the risk of late spring frosts damage prior to and duringbudburst. The interactive effects of longer photoperiod and low soil moisture significantly increased the water use efficiencyunder elevated [CO2]. However, the significant 2- and 3-way interactions suggest that drought and longer photoperiodswith northward migration will limit the positive effects of elevated [CO2] on growth and physiological processes in thespecies. These results might have important implications in assisted migration/seed transfer of the species following climatechange.
机译：气候变化将导致向北转移然而,气候信封北方植物不同的光周期andsoil水分政权高纬度地区可能会影响成功的物种迁移(自然和协助)。评估光周期的影响及其政权相互作用与土壤水分和二氧化碳morpho-physiological浓度([CO2])流程在杰克松松果体banksiana。老seedlingswere暴露于两个[CO2] (400950年更易mol-1),两个土壤深层(60 - 70%30 - 40%的水容量)和三个领域光周期的政权(光周期种子来源,5°和10°以北的种子来源)环境controlledgreenhouses。光周期、土壤水分和高[CO2]生长和生理过程theseedlings检查。杰克松对气候变化的响应将复杂的交互式影响下向北迁移相关的长光周期、土壤水分压力和提升[CO2]。高纬度地区下升高[CO2]明显先进budburst bothhigh和较低的土壤水分的政权,可能增加春末霜冻损害的风险之前和duringbudburst。长光周期和较低的土壤的影响水分显著增加水使用efficiencyunder升高[CO2]。重要的2 -和3路交互显示干旱和photoperiodswith更长向北迁移将限制积极的一面高架(二氧化碳)对经济增长的影响在thespecies生理过程。结果可能有重要的意义协助迁移/种子转移的物种气候变化。

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