Effects of hydric deficiency on gas exchange parameters and metabolism of Eucalyptus grandis clones

Coscolin, Renata Bruna Santos; Broetto, Fernando; Marchese, José Abramo; Campohermoso, Marco Castillo; Paladini, Marcos Vily

doi:10.1590/s1677-04202011000400002

Cited by 10 publications

(10 citation statements)

References 34 publications

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“…SOD activity can be required, even in normal situations, to dismutate reactive oxygen species evolved in the metabolism of sugars in the mitochondria, being necessary for the use of SOD as biochemical marker of parameters of the activity of the enzyme in normal environments (Coscolin et al, 2011). E. F.…”

Section: Resultsmentioning

confidence: 99%

Salicylic acid as attenuator of drought stress on germination and initial development of sesame

Silva

Suassuna

Melo

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TSesame is an important crop in Northeast Brazil, where climate conditions require adapted genotypes and alternatives for plant defense against drought. This study aimed to evaluate the salicylic acid as drought attenuator in sesame genotypes. The experiment evaluated six genotypes (BRS Seda, CNPA-G2, CNPA-G3, CNPA-G4, LAG-Branquinha and LAGPretinha), five osmotic potentials (0, -0.2, -0.4, -0.6 and -0.8 MPa) and three seed treatments (soaking in distilled water, in salicylic acid and no treatment). CNPA-G4 is tolerant to drought in the germination stage. Salicylic acid at 10 -5 M induced tolerance to drought stress in sesame, but it is necessary to test other concentrations.Ácido salicílico como atenuador de estresse hídrico na germinação e no desenvolvimento inicial de gergelim R E S U M O O gergelim é uma importante cultura no Nordeste brasileiro, cujas condições de semiaridez exigem genótipos adaptados, além de alternativas para defesa da planta contra a seca. Assim, objetivou-se avaliar o ácido salicílico como atenuador do estresse hídrico em genótipos de gergelim. Foram estudados seis genótipos (BRS Seda, CNPA-G2, CNPA-G3, CNPA-G4, LAG-Branquinha e LAG-Pretinha); cinco potenciais osmóticos (0; -0,2; -0,4; -0,6 e -0,8 MPa) e três tratamentos das sementes (pré-embebição em água destilada; em ácido salicílico e sem embebição). O genótipo CNPA-G4 possui elevada capacidade de tolerância ao déficit hídrico, na fase de germinação. O ácido salicílico a 10 -5 M induziu tolerância ao estresse hídrico em gergelim, porém se necessita testar outras concentrações.

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Section: Resultsmentioning

confidence: 99%

Salicylic acid as attenuator of drought stress on germination and initial development of sesame

Silva

Suassuna

Melo

et al. 2017

Rev. bras. eng. agríc. ambient.

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“…Also, it is commonly used in artificial afforestation around the world, and as a unique commercial tree species, Eucalyptus is planted on a large scale. However, Eucalyptus is often affected by abiotic stresses such as drought, low temperature, and salt stress during its growth, resulting in a decline in the yield [59][60][61]. Therefore, it is crucial to study and analyze the stress response-related genes of Eucalyptus to improve the excellent traits and breeding.…”

Section: Introductionmentioning

confidence: 99%

Genome-wide characterization and expression profiling of Eucalyptus grandis HD-Zip gene family in response to salt and temperature stress

Zhang

Guo

et al. 2020

BMC Plant Biol

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Background The HD-Zip transcription factors are unique to plants and play an essential role in plant growth, development and stress responses. The HD-Zip transcription factor family consists of a highly conserved homeodomain (HD) and a leucine zipper domain (LZ) domain. Although the HD-Zip gene family has been extensively studied in many plant species, a systematic study of the Eucalyptus HD-Zip family has not been reported until today. Here, we systematically identified 40 HD-Zip genes in Eucalyptus (Eucalyptus grandis). Besides, we comprehensively analyzed the HD-Zips of Eucalyptus by studying the homology, conserved protein regions, gene structure, 3D structure of the protein, location of the genes on the chromosomes and the expression level of the genes in different tissues. Results The HD-Zip family in Eucalyptus has four subfamilies, which is consistent with other plants such as Arabidopsis and rice. Moreover, genes that are in the same group tend to have similar exon-intron structures, motifs, and protein structures. Under salt stress and temperature stress, the Eucalyptus HD-Zip transcription factors show a differential expression pattern. Conclusions Our findings reveal the response of HD-Zip transcription factors under salt and temperature stresses, laying a foundation for future analysis of Eucalyptus HD-Zip transcription factors.

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“…Salt stress is usually associated with water stress, since high concentrations of sodium in soil promote the restriction of water absorption by plants (Plazek et al, 2013). Under these conditions, a reduction in stomata opening occurs in order to avoid excessive loss of water from plant leaves, thus restricting their photosynthetic capacity by reduction in CO 2 acquisition (Coscolin et al, 2011;Kumar et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Photosynthetic performance in Eucalyptus clones cultivated in saline soil

et al. 2019

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The aim of this study was to evaluate the photosynthetic performance of Eucalyptus clones with the aim of identifying their tolerance to soil saline stress conditions. The experiment was arranged in a randomized block design with a 3 × 4 factorial arrangement: in five replications, totaling 60 plots, three Eucalyptus clones were used, VC865, I224, and I144, which were exposed to four concentrations of NaCl (0, 1, 2 and 3 g NaCl kg-1 of soil). Clone I144 shows mechanisms of salinity tolerance as smaller reductions in the stomatal conductance, transpiration, photosynthesis, photochemical efficiency of PSII, photosynthetic pigment content and total dry mass. On the other hand, clone I224 presents greater physiological damage, indicating high susceptibility to salt stress, while VC865 shows moderate sensitivity to salinity. Variables related to photosynthetic performance, such as gas exchange, photochemical efficiency of PSII and photosynthetic pigments are potentially reliable physiological indicators for selecting of tolerant Eucalyptus clones to salt stress.

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Effects of hydric deficiency on gas exchange parameters and metabolism of Eucalyptus grandis clones

Cited by 10 publications

References 34 publications

Salicylic acid as attenuator of drought stress on germination and initial development of sesame

Salicylic acid as attenuator of drought stress on germination and initial development of sesame

Genome-wide characterization and expression profiling of Eucalyptus grandis HD-Zip gene family in response to salt and temperature stress

Photosynthetic performance in Eucalyptus clones cultivated in saline soil

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