Key leaf traits indicative of photosynthetic plasticity in tropical tree species

dosAnjos, Letícia; Oliva, Marco Antônio; Kuki, Kacilda Naomi; Mielke, Marcelo Schramm; Ventrella, Marília Contin; Galvão, M.F.; Pinto, Luiz Roberto Martins

doi:10.1007/s00468-014-1110-2

Cited by 32 publications

(37 citation statements)

References 55 publications

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“…The ability of plants to acclimate to different irradiances is a function of the morphophysiological adjustments of their leaves. These responses may vary among plant species or even with different development stages of a single species 6 . The amount of light that reaches leaves during development can cause structural adjustments in these organs, with significant changes in the thicknesses of the mesophyll and leaf blade, stomatal density, and the volume of the intercellular spaces 7 , 8 .…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the morphoanatomical plasticity, some plant species can adjust their photosynthetic responses to changes in irradiance, and these physiological variables play a decisive role in the acclimation of the plant to a shaded or full-sunlit environment 6 , 7 , 9 . The ability of plants to allocate biomass and survive under the most diverse lighting conditions depends on their photosynthetic capacity 11 , preventing photoinhibition under exposure to excessive light, or maximizing light capture when this resource is scarce 12 .…”

Section: Introductionmentioning

confidence: 99%

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Acclimation responses of macaw palm seedlings to contrasting light environments

Dias

Siqueira-Silva²,

Souza³

et al. 2018

Sci Rep

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The photosynthetic adjustments of macaw palm (Acrocomia aculeata) were evaluated in 30-day-old seedlings exposed to high and low light environments, and sudden transference from low to high light and comparisons were made with the hardening protocol used in nurseries. Furthermore, we evaluated the responses to long-term exposure (265 days) to high and low light environments. Macaw palm seedlings exhibited an efficient mechanism that maximized light capture under scarce conditions, and dissipated excess energy to avoid damaging to the photosystem II under high light. The seedlings showed low saturation irradiance but no photoinhibition when exposed to excess light. When grown under low light intensities, seedlings presented higher photochemical efficiency and minimized the respiratory costs with positive carbon balance at lower irradiance than hardened seedlings did. The hardening procedure did not appear to be an advantageous method during seedling production. Long-term exposure to either low or high light did not cause significant leaf anatomical adjustments. However, the low light seedlings showed higher leaf area and chlorophyll content than those exposed to higher light intensity did, which enabled shaded seedlings to maximize the captured light. Furthermore, the high non-photochemical dissipation allowed rapid acclimation to excessive light exposure. These responses allow macaw palm cultivation and establishment in very different light environments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acclimation responses of macaw palm seedlings to contrasting light environments

Dias

Siqueira-Silva²,

Souza³

et al. 2018

Sci Rep

Self Cite

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“…It is thus of great significance to study the stress resistance of plants by examining leaf anatomical structure 17,18 . Research on leaf anatomical structure has largely focused on the epidermis, mesophyll, and veins 19,20 . Some studies have revealed that leaf structure varies with the environment, with light intensity playing an important role in plant growth and morphological structure 21 .…”

Section: Discussionmentioning

confidence: 99%

Leaf structure and seed histochemistry analyses provided structural insights into the improved yield and quality of tree peony seed under light shading conditions

Han

Mei

et al. 2020

Sci Rep

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in biology, structure is the basis of function. for plants, changes in their physiological and ecological functions are usually caused by structural changes. to understand how shading conditions change the plant structures, thereby providing structural insights into the improved yield and quality, oilseed tree peony were shaded with different densities of polyethylene nets from 28 days after pollination (DAP) until harvesting. The thickness of the leaf (LT), vein (VT), upper epidermis (UET), lower epidermis (LET), palisade tissue (PT), sponge tissue (ST), as well as the accumulation and distribution of starch, protein, and fat, were observed at 14-day intervals. The results showed that shading had a significant effect on the anatomical structure of the leaves. In the rapid growth period (before 70 DAP), the LT, ET, and VT under shading were significantly lower than under non-shading. During this period, the accumulation of starch and protein under shading was lower than that under non-shading. At the maturation period (99-112 DAP), the LT and PT under shading were higher than under non-shading, indicating that light shading delayed leaf senescence and increased photosynthetic capacity. Shading delayed the degradation of the integument cells and prolonged seed development and nutrient accumulation.Tree peony (Paeonia section Moutan DC.) is indigenous to China, and its wild germplasms are mainly distributed in mountainous shrublands and secondary broad-leafed forests in the provinces of Henan, Gansu, and Shanxi 1 . In the transplantation process of oilseed tree peony from mountainous shrublands to the field, their leaves usually turn yellow, senescence prematurely, or even fall off due to the high light intensity and temperature, which seriously reduces the yield and quality of the tree peony seeds 2 . Shading is the preferred method for providing a suitable environment during the growth period since high light intensity and temperature are detrimental to ornamenta shrubs growth 3 . For example, when kiwi fruit plants were shaded, the canopy microclimate was significantly optimized, the temperature was lowered, and the humidity was increased, which effectively alleviated the physiological stress of the leaves and fruits and reduced the fallen fruit 4 . Under shading, Trollius chinensis Bunge grew relatively better and exhibited an extended viewing life 5 .Light is a primary factor of the physical environment. Shading changes the microenvironment, which consequently alters leaf physiological characteristics 6 as well as leaf structure 7-9 . Shading increases leaf area and reduces leaf thickness 7 and reduces palisade tissue and stomatal density 8 . It also increases the intercellular space between the palisade tissue and spongy tissue, as well as the numbers of vascular bundles 5 . Shading has also been found to reduce the palisade tissue thickness, stomatal density, and the ratio of palisade tissue to sponge tissue 10 . Shading www.nature.com/scientificreports www.nature.com/scientificreports/ than that under non-s...

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“…The damage of the photosynthetic apparatus makes plants more susceptible to other environmental stresses. It affects plant growth and establishment (Anjos et al, 2015). The species that do not show damage to photosynthetic apparatus and exposes higher phenotypic plasticity can explain the establishment in a wide range of different environmental conditions (Barros et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

WATER DEFICIT ENSURES THE PHOTOCHEMICAL EFFICIENCY OF Copaifera langsdorffii Desf1

et al. 2017

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The intensity and frequency of drought periods has increased according to climate change predictions. The fast overcome and recovery are important adaptive features for plant species found in regions presenting water shortage periods. Copaifera langsdorffii is a neotropical species that has developed leaves presenting physiological mechanisms and morphological adaptations that allow its survival under seasonal water stress. We aimed in this work to observe substantial physiological responses for water saving and damage representative to the photochemical reaction after exposed plants to water stress and to subsequent recovery. We found in plants mechanisms to control water loss through the lower stomatal conductance, even after rehydration. It goes against the rapid recovery of leaves, indicated by the relative water content values restored to previously unstressed plants. Stomatal conductance was the only variable presenting high plasticity index. In photochemical activity, the species presented higher photochemical quenching, electron transport rate and effective quantum yield of photosystem II when they were subjected to rehydration after water stress period. Our results suggest that C. langsdorffii presented rapid rehydration and higher photochemical efficiency even after water restriction. These data demonstrate that this species can be used as a model for physiological studies due to the adjustment developed in response to different environmental schemes.

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Key leaf traits indicative of photosynthetic plasticity in tropical tree species

Cited by 32 publications

References 55 publications

Acclimation responses of macaw palm seedlings to contrasting light environments

Acclimation responses of macaw palm seedlings to contrasting light environments

Leaf structure and seed histochemistry analyses provided structural insights into the improved yield and quality of tree peony seed under light shading conditions

WATER DEFICIT ENSURES THE PHOTOCHEMICAL EFFICIENCY OF Copaifera langsdorffii Desf1

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