Leaf anatomy and morphometry in three eucalypt clones treated with glyphosate

Santos, L.D. Tuffi; Sant’Anna-Santos, Bruno Francisco; Meira, Renata Maria Strozi Alves; Ferreira, F.A.; Tibúrcio, Rafael Augusto Soares; Machado, A.F.L.

doi:10.1590/s1519-69842009000100016

Cited by 29 publications

(13 citation statements)

References 20 publications

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“…An apparent increase in the number of root lateral ramifications was the only visible morphological alteration, which reinforces the importance of anatomical studies for the precocious diagnose of the damage caused by arsenic or other pollutants (Sant' Anna-Santos et al, 2007;Tuffi-Santos et al, 2009;Silva et al, 2005;Siqueira-Silva et al, 2012;Santana et al, 2014).…”

Section: Speciessupporting

confidence: 63%

Arsenic accumulation in Brassicaceae seedlings and its effects on growth and plant anatomy

Freitas-Silva

Araújo

Silva

et al. 2016

Ecotoxicology and Environmental Safety

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We wished to evaluate the effects of arsenic on the morphology and anatomy of Brassica oleracea, Raphanus sativus, Brassica juncea, Brassica oleracea var. capitata and Brassica oleracea var. italica. Seeds were subjected to concentrations 0µM, 250µM, 350µM and 450µM arsenic in the form of sodium arsenate (Na2HAsO4·7H2O) during 12 days. All species accumulated more arsenic in the roots than in the shoots, except for B. oleracea var. capitata. There was no difference of translocation factor between species and treatments. Growth decrease was observed in roots of B. oleracea and R. sativus, and in shoots of R. sativus and B. oleracea var. italica. All species presented anatomical alterations in the roots, such as: cell hypertrophy, protoplast retraction, cellular plasmolysis, and necrotic regions. B. juncea presented collapse and hypertrophy of cells from the leaf blade tissues. Quantitative anatomical analyses performed on the root and leaves of B. oleracea and B. juncea revealed that arsenic interfered on the root vascular cylinder diameter and on height of epidermal cells of the adaxial leaf surface of both species. We concluded that arsenic was absorbed from the culture medium and induced alterations both on root and shoot growth of the seedlings. Retention of arsenic within the root was responsible for major damage in this organ.

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Section: Speciessupporting

confidence: 63%

Arsenic accumulation in Brassicaceae seedlings and its effects on growth and plant anatomy

Freitas-Silva

Araújo

Silva

et al. 2016

Ecotoxicology and Environmental Safety

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“…Photosynthetic pigments are considered as one of the pillars of photosynthetic performance in plants (Tuffi Santos et al, 2009;Yanniccari et al, 2012;Zobiole et al, 2011). Therefore, decreases in the content of chlorophylls triggered by glyphosate at least partly contributed to the decreases in the efficiency of the photosynthetic apparatus.…”

Section: Discussionmentioning

confidence: 99%

Pouteria torta: a native species of the Brazilian Cerrado as a bioindicator of glyphosate action

et al. 2017

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In Brazil, the expansion of agricultural activity and the associated indiscriminate use of herbicides such as glyphosate is directly related to the loss of biodiversity in the Cerrado. The identification of plant species as bioindicators of herbicide action, especially species native to the area, can help in monitoring the impacts of xenobiotics in the remaining Cerrado. Thus, this study was designed to evaluate the possible use of the native Cerrado species Pouteria torta as a bioindicator of glyphosate action via changes in physiological performance. At 16 months after sowing, the effect of glyphosate was evaluated by applying the following doses: 0 (control), 25, 50, 100, 200, 400, 800, and 1200 g a.e. ha -1 . In response to glyphosate, P. torta exhibited reductions in photosynthesis and chloroplastid pigment content, as well as accumulation of shikimic acid and the occurrence of chlorosis and necrosis. These changes demonstrate the high sensitivity of P. torta to glyphosate and its potential for use as a bioindicator of this herbicide.Keywords: phytotoxicity, photosynthetic processes, biomarker, guapeva, herbicide. Pouteria torta: espécie native do Cerrado Brasileiro como bioindicadora da ação do glyphosate ResumoNo Brasil, a expansão da atividade agrícola, aliada a utilização indiscriminada de herbicidas como o glyphosate, possui relação direta com a perda da biodiversidade no Cerrado. A identificação de espécies vegetais bioindicadoras da ação de herbicidas, particularmente as nativas do Cerrado, pode auxiliar em processos de monitoramento dos impactos desse xenobiótico nas remanescentes do Cerrado. Assim, este estudo foi projetado para avaliar o possível uso de Pouteria torta, espécie nativa do cerrado, como bioindicadora da ação do glyphosate via mudanças na sua performance fisiológica. Após 16 meses de semeadura, o efeito do glyphosate foi avaliado quando aplicadas as seguintes doses: 0 (controle), 25, 50, 100, 200, 400, 800 e 1200 g e. a. ha -1 . Em reposta ao glyphosate, as plantas de P. torta apresentaram redução na sua performance do processo fotossintético e no conteúdo de pigmentos cloroplastídicos, além do acúmulo de ácido chiquímico e da ocorrência de cloroses e necroses. Essas alterações demonstram a alta sensibilidade de P. torta ao glyphosate, o que potencializa a sua utilização como bioindicadora da ação desse herbicida.

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“…The epidermis is one of the most important tissues for plants and is related to plant tolerance for many environmental conditions, such as excessive radiation, pathogens and herbicides (Tuffi Santos et al, 2009;Parent et al, 2008). According to Braccini et al (2008) and Casa et al (2007), high density population of plants may lead to a higher incidence of pathogens.…”

Section: Discussionmentioning

confidence: 99%

Anatomical traits related to stress in high density populations of Typha angustifolia L. (Typhaceae)

et al. 2017

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Some macrophytes species show a high growth potential, colonizing large areas on aquatic environments. Cattail (Typha angustifolia L.) uncontrolled growth causes several problems to human activities and local biodiversity, but this also may lead to competition and further problems for this species itself. Thus, the objective of this study was to investigate anatomical modifications on T. angustifolia plants from different population densities, once it can help to understand its biology. Roots and leaves were collected from natural populations growing under high and low densities. These plant materials were fixed and submitted to usual plant microtechnique procedures. Slides were observed and photographed under light microscopy and images were analyzed in the UTHSCSA-Imagetool software. The experimental design was completely randomized with two treatments and ten replicates, data were submitted to one-way ANOVA and Scott-Knott test at p<0.05. Leaves from low density populations showed higher stomatal density and index. These modifications on stomatal characteristics were more evident on the leaf abaxial surface. Plants from low density populations showed thicker mesophyll and higher proportion of aerenchymal area. Roots from low density populations showed a higher proportion of the vascular cylinder. Whereas, plants from higher density populations showed greater thickness of the endodermis, exodermis, phloem and root cortex. Higher density populations showed a higher proportion of aerenchymal gaps in the root cortex. Therefore, cattail plants from populations growing under high density population show anatomical traits typical of plants under stress, which promotes the development of less functional anatomical modifications to aquatic environments.Keywords: anatomical plasticity, cattail, macrophytes, plant handling, eutrophication, stress. Características anatômicas relacionadas ao estresse em altas densidades populacionais de Typha angustifolia L. (Typhaceae)

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Leaf anatomy and morphometry in three eucalypt clones treated with glyphosate

Cited by 29 publications

References 20 publications

Arsenic accumulation in Brassicaceae seedlings and its effects on growth and plant anatomy

Arsenic accumulation in Brassicaceae seedlings and its effects on growth and plant anatomy

Pouteria torta: a native species of the Brazilian Cerrado as a bioindicator of glyphosate action

Anatomical traits related to stress in high density populations of Typha angustifolia L. (Typhaceae)

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