Environmental Controls of Reproduction and Early Growth of<i>Lindera melissifolia</i>(Lauraceae)

Unks, Ryan R.; Shear, Theodore H.; Krings, Alexander; Braham, Richard R.

doi:10.2179/14-034

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…In concurrence with our expectation, L. melissifolia shrubs acclimated to the low-light environment produced the least amount of biomass-this is consistent with the concept that with all other factors being equal, light is the primary limitation to plant growth (Luken et al 1997, Gardiner and Hodges 1998, Poorter et al 2012. Unks et al (2014) projected that low-light availability would limit biomass accumulation in this species during the first year of seedling growth, and our results extend this conclusion through the third growing season at the FRF. In addition to limiting whole-plant biomass accumulation, the stress of low-light availability appeared to trigger a plastic response in photosynthate allocation among tissues.…”

Section: Discussionsupporting

confidence: 92%

“…As we hypothesized, L. melissifolia raised under low light favored biomass accumulation in leaf and stem tissues over biomass accumulation in root tissue. Others have reported a corresponding shift in proportional biomass accumulation by seedlings (<1 year old) of this species (Unks et al 2014), but it is noteworthy that this response was confirmed in our study of plants with more advanced ontogeny. The plastic shift in photosynthate allocation to aboveground tissues is a strategy to increase light capture in low-light environments (Walters et al 1993).…”

Section: Discussionsupporting

confidence: 87%

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Biomass Accumulation in the Endangered Shrub Lindera melissifolia as Affected by Gradients of Light Availability and Soil Flooding

et al. 2018

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We studied the impacts of light availability and soil flooding on biomass accumulation and tissue biomass fractions in Lindera melissifolia (Walt.) Blume, an endangered woody shrub of the southeastern United States. Our experiment was located in a large-scale flooding research facility where plants were established and grown for three years while receiving combinations of 70%, 37%, or 5% of full sunlight with either 0, 45, or 90 days of soil flooding. We hypothesized that biomass accumulation would decrease with decreasing light availability and that soil flooding would further reduce plant mass. In the absence of soil flooding, shrubs receiving 37% light accumulated the greatest biomass (972 g), shrubs receiving 70% light were intermediate in biomass accumulation (737 g), and shrubs receiving 5% light accumulated the least biomass (14 g). Shrubs raised beneath 37% light had root biomass fractions less indicative of water stress than shrubs raised beneath 70% light, and leaf and stem biomass fractions less indicative of light deprivation than shrubs raised beneath 5% light. The light environment also influenced how soil flooding affected L. melissifolia biomass accumulation. Soil flooding had no detectable effect on the amount of biomass accumulated by shrubs acclimated to 5% light. However, shrubs acclimated to 70% or 37% light showed a 26% decrease in biomass accumulation after 90 days of soil flooding. Our findings demonstrate a responsive plasticity of L. melissifolia biomass accumulation relative to light availability and soil flooding, and this plasticity was driven by shifts among leaf, stem, and root biomass fractions. This plasticity supports development of silvicultural options for active management of this endangered species in floodplain forests of the Mississippi Alluvial Valley.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 87%

Biomass Accumulation in the Endangered Shrub Lindera melissifolia as Affected by Gradients of Light Availability and Soil Flooding

et al. 2018

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“…In contrast, Unks et al. ( 2014 ), who studied L. melissifolia at 2 field sites in North Carolina, USA, were unable to establish a correlation between light transmittance through the overstory and the number of flowering stems in colonies. Our results demonstrate the strong effect of light availability on intensity of sexual reproduction in L. melissifolia .…”

Section: Discussionmentioning

confidence: 92%

Intensity and mode of Lindera melissifolia reproduction are affected by flooding and light availability

Leininger

Gardiner

Lockhart

et al. 2021

Ecology and Evolution

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We studied the impact of flooding and light availability gradients on sexual and asexual reproduction in Lindera melissifolia (Walt.) Blume, an endangered shrub found in floodplain forests of the Mississippi Alluvial Valley (MAV), USA. A water impoundment facility was used to control the duration of soil flooding (0, 45, or 90 days), and shade houses were used to control light availability (high = 72%, intermediate = 33%, or low = 2% of ambient light) received by L. melissifolia established on native soil of the MAV. Sexual reproductive intensity, as measured by inflorescence bud count, fruit set, and drupe production, was greatest in the absence of soil flooding. Ninety days of soil flooding in the year prior to anthesis decreased inflorescence bud counts, and 45 days of soil flooding in the year of anthesis lessened fruit set and drupe production. Inflorescence bud development was the greatest in environments of intermediate light, decreased in high-light environments, and was absent in low light environments. But low fruit set diminished drupe production in intermediate light environments as compared to high light environments. Asexual reproduction, as measured by development of new ramets, was greatest in the absence of soil flooding and where plants were grown in high or intermediate light. Plants exhibited plasticity in reproductive mode such that soil flooding increased the relative importance of asexual reproduction. The high light environment was most favorable to sexual reproduction, and reproductive mode transitioned to exclusively asexual in the low light environment. Our results raise several implications important to active management for the conservation of this imperiled plant.

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Light availability and soil flooding regulate photosynthesis of an imperiled shrub in lowland forests of the Mississippi Alluvial Valley, USA

Lockhart¹,

Gardiner²,

Leininger³

et al. 2017

Photosynt.

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Environmental Controls of Reproduction and Early Growth ofLindera melissifolia(Lauraceae)

Cited by 3 publications

References 22 publications

Biomass Accumulation in the Endangered Shrub Lindera melissifolia as Affected by Gradients of Light Availability and Soil Flooding

Biomass Accumulation in the Endangered Shrub Lindera melissifolia as Affected by Gradients of Light Availability and Soil Flooding

Intensity and mode of Lindera melissifolia reproduction are affected by flooding and light availability

Light availability and soil flooding regulate photosynthesis of an imperiled shrub in lowland forests of the Mississippi Alluvial Valley, USA

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