Leaf trait plasticity in six forest tree species of central Amazonia

Marenco, Ricardo Antonio; Camargo, Miguel Ângelo Branco; Antezana-Vera, Saul Alfredo; Oliveira, M. F.

doi:10.1007/s11099-017-0703-6

Cited by 22 publications

(13 citation statements)

References 53 publications

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“…Asat and gsCO2 were measured at 1000 μmol m -2 s -1 , ambient temperature (27 °C), relative humidity of 70 ± 5%, and CO2 concentration of 400 ppm (ambient CO2 treatment) and 700 ppm (eCO2 treatment). We also determined light and CO2-saturated photosynthesis (Amax) at a [CO2] of 2000 ppm (Ca), as previously described (Marenco et al 2017). To obtain Asat-mass, Amax-mass, CEmass and gsCO2-mass, photosynthetic rates, CE and gsCO2 per unit area were converted to a mass basis by multiplying them by SLA.…”

Section: Gas Exchange Parametersmentioning

confidence: 99%

Gas exchange, biomass allocation and water-use efficiency in response to elevated CO2 and drought in andiroba (Carapa surinamensis, Meliaceae)

Oliveira¹,

Marenco²

2019

iForest

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Biogeosciences and Forestry Biogeosciences and Forestry Gas exchange, biomass allocation and water-use efficiency in response to elevated CO 2 and drought in andiroba (Carapa surinamensis, Meliaceae) Marcilia Freitas de Oliveira (1) , Ricardo Antonio Marenco (2) Prolonged droughts are predicted for some parts of the Amazon; however, it is still unclear how Amazonian trees will respond to water stress under the ongoing increase in CO2 concentration. The aim of this study was to assess the effect of elevated CO2 (eCO2) and drought on photosynthetic rates, water-use efficiency, and biomass allocation in andiroba (Carapa surinamensis). The plants were grown in pots at ambient (400 ppm CO2) and eCO2 (700 ppm) at two water regimes, soil at 50% field capacity, FC (drought) and soil at 100% FC for 163 days. We measured light saturated photosynthesis on a mass basis (Asat-mass), stomatal conductance to CO2 on a mass basis (gsCO2-mass), whole-plant water-use efficiency (WUEP), biomass accumulation, specific leaf area (SLA) and total leaf area. At eCO2, Asat-mass increased 28% in well-watered plants and 93% under drought, whereas gsCO2-mass declined 39% in well-watered plants at eCO2, with no effect of drought on gsCO2-mass at eCO2. The total biomass gain improved 73% at eCO2 and over CO2 levels it was reduced (54%) by drought. WUEP improved (188%) at eCO2 in well-watered plants and 262% under drought. SLA declined 23% at eCO2, but the effect of drought on SLA was null. On the contrary, total leaf area was greatly reduced (67%) by drought, but it was not affected by eCO2. The large increase in total biomass and the substantial improvement in WUEP under eCO2, and the sharp decline in leaf area under water stress widen our knowledge on the physiology of this important species for the forest management of large areas in the Amazon region.

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Section: Gas Exchange Parametersmentioning

confidence: 99%

Gas exchange, biomass allocation and water-use efficiency in response to elevated CO2 and drought in andiroba (Carapa surinamensis, Meliaceae)

Oliveira¹,

Marenco²

2019

iForest

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“…番茄中, 根据茸毛是否含有或分泌对昆虫或病原体具有抗性的化合物, 将多细胞茸毛分为ⅠV [49] , 并且随着叶片个体差异而有所变化 [50] , 而茸毛长度增加会导致叶片对光的吸收率下降. 致密的茸毛能够调节叶片的热量平衡, 并且拦截光量子, 从而影响植物体的气体交换, 在高光强时具有保护作用 [51] . 有研究表明, 叶片茸毛的密度是可变的, 并且受遗传和环境因素决定 [1] , 当土壤水分不足, 高温, 蒸气压亏缺(vapour pressure deficit, VPD)时能增加叶片茸毛密度 [52,53] .…”

Section: 和非腺毛结构有研究表明很多已经被定位和克隆unclassified

Molecular mechanism and physiological function of trichome formation in plant

et al. 2017

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“…It has been frequently assumed that within-species variation is smaller than among species. This is exemplified by the large number of studies based on species means (e.g., Liu et al, 2021;Kelly et al, 2021) regardless of both theoretical background (Bolnick et al, 2011;Violle et al, 2012) and empirical evidence for intraspecific variation (e.g., Albert et al, 2011;Marenco et al, 2017;Osnas et al, 2018;Dong et al, 2020), pointing out that we still know little at which scales, life-forms, taxa and across which environmental gradients intraspecific variation is relevant to ecological processes. Moreover, there is a virtual lack of information on these patterns of intra to interspecific trait variation in palms, which have been suggested to be particularly susceptible to droughts (Eiserhardt et al, 2011;Esquivel-Muelbert et al, 2019; but see Emilio et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Intraspecific Variation on Palm Leaf Traits of Co-occurring Species—Does Local Hydrology Play a Role?

Emilio¹,

Pereira²,

Costa³

2021

Front. For. Glob. Change

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The study of plant species and trait distributions can provide answers to many of the ecological challenges of our times, from climate change to the biodiversity crisis. Although traits are classically measured at the species level, understanding intraspecific variation is necessary to determine the type of response species will have to climate change. Here we measured and analyzed seven leaf traits (leaf area—LA, specific leaf area—SLA, leaf thickness—LT, leaf dry mass content—LDMC, venation density—VD, stomata length—SL, and stomata density—SD) across 14 locally dominant palm species (10 individuals/species) distributed along hydro-topographic gradients (1.4–37 m of terrain height above nearest drainage) of a central Amazonian forest to disentangle the role of species identity, relatedness, and local hydrology on trait variation and covariation. Our results show that trait variation is not always larger between species than within species as expected. Intraspecific variation accounted for 23–74% of trait variation depending on the trait. Most of the variation happened at species level for SL, LA, LT, and SD but not for SLA, VD, and LDMC. For a third of the traits (LDMC, SLA, and SD), we found some evidence of phylogenetic inertia. This lack of independency among traits is confirmed by the maintenance of strong correlation among some of those traits after controlling for local environmental conditions. Intraspecific variation, however, was not related to height above nearest drainage for any of the traits. Most of the trait–environment relationships were species-specific. Therefore, the change in palm trait composition detected along topography, from higher community means of SLA and LA, lower LT, LDMC, SL, and SD in the wet valleys to opposite traits in drier plateaus, is mostly due to the turnover in species composition and relative abundance variation. We conclude these palm species have well-defined hydrological niches, but their large intraspecific variation in leaf traits does not contribute to the adjustment of individuals to the local hydrological conditions in this Amazonian forest.

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Leaf trait plasticity in six forest tree species of central Amazonia

Cited by 22 publications

References 53 publications

Gas exchange, biomass allocation and water-use efficiency in response to elevated CO2 and drought in andiroba (Carapa surinamensis, Meliaceae)

Gas exchange, biomass allocation and water-use efficiency in response to elevated CO2 and drought in andiroba (Carapa surinamensis, Meliaceae)

Molecular mechanism and physiological function of trichome formation in plant

Intraspecific Variation on Palm Leaf Traits of Co-occurring Species—Does Local Hydrology Play a Role?

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