Chlorophyll fluorescence parameters in populations of two legume trees: Stryphnodendron adstringens (Mart.) Coville (Mimosoideae) and Cassia ferruginea (Schrad.) Schrad. ex DC. (Caesalpinoideae)

Filho, José Pires Lemos; Goulart, Maíra Figueiredo; Lovato, Maria Bernadete

doi:10.1590/s0100-84042004000300012

Cited by 9 publications

(1 citation statement)

References 22 publications

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“…Higher ETR values with increased values of photosynthetically active radiation (PAR), and the consequent reduction in the values of DF/Fm 0 , are a pattern that has been previously documented in woody species of the Cerrado (Lemos-Filho 2000;Lemos-Filho et al 2004;Ribeiro et al 2004;Barros et al 2012). A study involving Ouratea hexasperma (A.St.-Hil) showed that the species increases ETR and decreases DF/Fm 0 throughout the day as PAR increases (Franco and Lüttge 2002), so it can be said that the long-life span leaves of O. castaneifolia seem to respond in a similar way as other species of the genus Ouratea from the Cerrado.…”

Section: Discussionmentioning

confidence: 53%

How the long-life span leaves of Ouratea castaneifolia Engl. (Ochnaceae) differ in distinct light conditions

et al. 2018

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Plants respond to variation in luminosity leading to the existence of distinct leaf traits in plants that inhabit the understory, edge, and canopy of tropical forests. In the present work, the long-life leaves of Ouratea castaneifolia Engl. (Ochnaceae) in forest edge and understory were evaluated. Leaves of 20 individuals were collected from each habitat. Median regions of leaves from the third node were fixed in FAA. Freehand-cut transverse sections were stained in astra blue and safranin. The thickness of tissues, leaf area, specific leaf mass, and relative water content were quantified. Quantum yield of photosynthesis was measured by Fv/Fm, and instantaneous light response curves were performed to extract ETR max , PAR sat , and DF/Fm 0 sat. Quantification of photosynthetic pigments was also performed. Leaf area was lower at the forest edge, while the specific leaf mass was higher. No structural differences or differences in relative water content were observed between individuals of the two environments. The thicknesses of the cuticle on the adaxial surface, the epidermal cells on the abaxial surface, and the palisade and spongy parenchyma were greater in individuals at the forest edge. The values of Fv/ Fm were around 0.8 in the predawn. In midday, higher values of Fv/Fm were observed in individuals located in the understory. Individuals of the understory had higher levels of chlorophyll a, chlorophyll b, and total chlorophyll. The morphological traits were the most plastic, but modulations in both morphology and pigment concentration may explain the maintenance of a similar predawn quantum yield between environments.

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Section: Discussionmentioning

confidence: 53%

How the long-life span leaves of Ouratea castaneifolia Engl. (Ochnaceae) differ in distinct light conditions

et al. 2018

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Can the Chlorophyll-a Fluorescence be Useful in Identifying Acclimated Young Plants from Two Populations of Cecropia Pachystachya Trec. (Urticaceae), Under Elevated CO2 Concentrations?

et al. 2014

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The physiological behavior of PSII measured by chlorophyll a fluorescence explains stress responses; wonders if it can differentiate plants from different populations. For this purpose, acclimated young plants of two C. pachystachya populations were cultivated from seeds. Chlorophyll-a fluorescence was measured after fertilization and [CO(2)](e). In the first 48 h after fertilization there was a reduction in the maximum quantum yield of PSII, while the means obtained under [CO(2)](e) were significantly higher than in other treatments (0.8 and 0.81). The variable PI best expressed the different conditions tested. Compared to their respective controls, the reduction of DIo/CS was 35.89 % in population (P) and 41.89 % in population (I), while the polyphasic fluorescence kinetics differed between treatments, but not necessarily between populations, except for post-fertilization at I-P steps. The analysis of kinetics between Fo and Fj (Wt) showed no K band during the O-J phase. The interferences found in PSII reinforces the idea of reversible damage to PSII. This effect is directly related to the reduced electron transport rate and increased non-photochemical dissipation and may be similar to those observed under field conditions after planting; adjustment time depends, among other factors, on the genetic potential of the species.

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Ultrastructural and functional chloroplast changes promoting photoacclimation after forest management in a tropical secondary forest

Teixeira

Trindade

Cunha

et al. 2018

Forest Ecology and Management

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Chlorophyll fluorescence parameters in populations of two legume trees: Stryphnodendron adstringens (Mart.) Coville (Mimosoideae) and Cassia ferruginea (Schrad.) Schrad. ex DC. (Caesalpinoideae)

Cited by 9 publications

References 22 publications

How the long-life span leaves of Ouratea castaneifolia Engl. (Ochnaceae) differ in distinct light conditions

How the long-life span leaves of Ouratea castaneifolia Engl. (Ochnaceae) differ in distinct light conditions

Can the Chlorophyll-a Fluorescence be Useful in Identifying Acclimated Young Plants from Two Populations of Cecropia Pachystachya Trec. (Urticaceae), Under Elevated CO2 Concentrations?

Ultrastructural and functional chloroplast changes promoting photoacclimation after forest management in a tropical secondary forest

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