Estresse térmico no acúmulo de prolina livre de plântulas de guandu oriundas de sementes tratadas com poliaminas

Silva, Jéssica da; Saccini, Vanessa Aparecida Villanova; Santos, Durvalina Maria Mathias dos

doi:10.5433/1679-0359.2015v36n1p103

Cited by 2 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A temperature increase may promote the denaturation of membrane proteins, affecting the activity of enzymes that are important for the preservation of its integrity, such as peroxidase, catalase and superoxide temperature values. The high proline content found in V. ferruginea seedlings under thermal stress suggests that this amino acid has acted as an osmoregulator or a signal, capable of activating multiple responses that are part the acclimatization process (Silva et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

“…The proline accumulation tendency in plants under stress has been commonly reported in literature. Many studies have related proline accumulation to the induction of osmotic adjustment with low and high temperature stress protective effects, to prevent protein denaturation, to preserve the structure of enzymes, to protect membranes from the deleterious effects caused by reactive oxygen species (ROS) and to inhibit protein aggregation (Silva et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

“…Plants, as sessile organisms, are often exposed to adverse conditions such as water restriction, soil salinity, heavy metal toxicity, nutritional deficiency or toxicity, variations of ultraviolet radiation, as well as high and low temperatures (Silva et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Climatic factors, such as excessively low or high temperatures, are significant sources of abiotic stress, which act by potentiating or limiting the development of a species, as well as altering its photosynthetic capacity, biomass accumulation and even the senescence rate (Larcher, 2006;Silva et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Growth of Vernonia ferruginea Seedlings Submitted to Thermal Stress

et al. 2020

View full text Add to dashboard Cite

ABSTRACT: Stress caused by extreme temperatures is one of the main elements that limit the geographical distribution and the seasonal growth of several plants, causing a severe delay in their development, reducing the photosynthetic rate and signaling the synthesis of defense compounds. Considering the current environmental changes and the damages that these changes can cause in plant physiology and growth, the objective of this work was to understand the interactions between temperature, physiology and growth, and to characterize the impact of temperature changes on the initial development of Vernonia ferruginea Less. Seedlings of this species were conditioned in germination chambers at previously adjusted constant temperatures (10, 20, 25, 30, and 35 oC) for sixty days, in order to evaluate physiological and growth parameters. The optimum temperature range for the initial growth of V. ferruginea is between 25 and 30 oC. The stress caused by sub-optimal and over-optimal temperatures affected cell homeostasis and caused a delay in the growth and development of seedlings. In stressful situations, growth inhibition and the activation of response mechanisms were observed for the adaptation and maintenance of cellular homeostasis through the accumulation of the proline osmoprotectant and soluble carbohydrates. Additionally, plants presented a normal development within a wide temperature range, despite the development delay, the change in gas exchanges and the synthesis of substances related to the defense system.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Growth of Vernonia ferruginea Seedlings Submitted to Thermal Stress

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Application of either 0.1 or 1 mM of exogenous Put, Spd, or Spm in V. radiata seedlings resulted in an enhancement of the thermal protection, as shown by growth parameters (Basra et al, 1997). Also, exogenous Put or Spm application (0.5 mM) to C. cajan seeds resulted in a higher germination percentage, and when applied on the seedlings, it resulted in the accumulation of proline (Silva et al, 2015). The protective role of the de novo PAs synthesis was revealed by treating V. radiata seedlings with inhibitors of PAs biosynthesis [2 mM and 4 mM of either difluoromethylornithine (DFMO) or DFMA], which rendered them vulnerable to heat-shock (lower root, hypocotyl and whole seedling length), being the inhibitory effect reversed by exogenous Put (1 mM; Basra et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Polyamines and Legumes: Joint Stories of Stress, Nitrogen Fixation and Environment

et al. 2019

View full text Add to dashboard Cite

Polyamines (PAs) are natural aliphatic amines involved in many physiological processes in almost all living organisms, including responses to abiotic stresses and microbial interactions. On other hand, the family Leguminosae constitutes an economically and ecologically key botanical group for humans, being also regarded as the most important protein source for livestock. This review presents the profuse evidence that relates changes in PAs levels during responses to biotic and abiotic stresses in model and cultivable species within Leguminosae and examines the unreviewed information regarding their potential roles in the functioning of symbiotic interactions with nitrogen-fixing bacteria and arbuscular mycorrhizae in this family. As linking plant physiological behavior with “big data” available in “omics” is an essential step to improve our understanding of legumes responses to global change, we also examined integrative MultiOmics approaches available to decrypt the interface legumes-PAs-abiotic and biotic stress interactions. These approaches are expected to accelerate the identification of stress tolerant phenotypes and the design of new biotechnological strategies to increase their yield and adaptation to marginal environments, making better use of available plant genetic resources.

show abstract

Estresse térmico no acúmulo de prolina livre de plântulas de guandu oriundas de sementes tratadas com poliaminas

Cited by 2 publications

References 15 publications

Growth of Vernonia ferruginea Seedlings Submitted to Thermal Stress

Growth of Vernonia ferruginea Seedlings Submitted to Thermal Stress

Polyamines and Legumes: Joint Stories of Stress, Nitrogen Fixation and Environment

Contact Info

Product

Resources

About