Antioxidative response and photosynthetic regulatory mechanisms in common fig leaves after short‐term chilling stress

2021 ◽  
Author(s):  
Selma Mlinarić ◽  
Vera Cesar ◽  
Hrvoje Lepeduš
Keyword(s):  
Chilling Stress ◽  
Regulatory Mechanisms ◽  
Short Term ◽  
Antioxidative Response ◽  
Common Fig

scholarly journals The effect of the method of application and concentration of asahi sl on the response of cucumber plants to chilling stress

2012 ◽  
Vol 63 (2) ◽  
pp. 161-169
Author(s):  
Edward Borowski
Keyword(s):  
Chilling Stress ◽  
Growth Period ◽  
Growth Conditions ◽  
Early Growth ◽  
Proline Content ◽  
Carotenoid Content ◽  
Leaf Biomass ◽  
Fluorescent Light ◽  
Free Proline ◽  
Short Term

In pot experiments conducted on cucumber cv. Śremski F1, the effect was studied of short-term chilling stress on plants which had grown from seeds germinating in the solution of Asahi SL or treated with this biostimulator during the early growth period. The plants were grown in a phytotron at an air temperature of 27/22°C (day/night), using fluorescent light with FAR flux density of 220 &#956;mol x m<sup>-2</sup> x s<sup>-1</sup> and with a photoperiod of 16/8. The biostimulator was applied using the following methods: a) germination of seeds in 0.01% and 0.05% solution, b) watering of plants twice with 0.01% or 0.05% solution, c) spraying leaves with 0.3% or 0.5% solution. Plants sprayed with distilled water were the control. After 24 hours from foliar or root application of Asahi SL, one half of the plants from each experimental series was treated for a period of 3 days at a temperature of 12/6°C, with all the other growth conditions unchanged. The obtained results show that short-term chilling stress caused a significant increase in electrolyte leakage, free proline content and in the activity of ascorbate peroxidase in leaves, but a decrease in the content of chlorophyll, its maximum fluorescence (Fm) and quantum yield (Fv/Fm), carotenoid content, stomatal conductance, transpiration, photosynthesis, leaf biomass and in the activity of catalase in leaves. Foliar or root application of Asahi SL in the pre-stress period decreased the values of the traits which increased as a result of chilling or increased those which decreased. Higher concentrations of the biostimulator solutions, applied using this method, were more effective. The application of the biostimulator during seed germination did not result in significant changes in the response of plants to chilling stress.

scholarly journals Molecular Resiliency and Aging

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 163-163
Author(s):  
Adam Salmon
Keyword(s):  
Healthy Aging ◽  
Regulatory Mechanisms ◽  
Human Populations ◽  
Biological Mechanisms ◽  
Short Term ◽  
Biology Of Aging ◽  
Physiological Markers ◽  
Molecular Regulatory Mechanisms ◽  
Insight Into ◽  
Translational Models

Abstract Resilience is described as the ability to respond to acute forms of stress and recover to normal homeostasis. There is growing evidence that biology of resilience is entwined with the biology of aging. With increasing age, resilience decreases and is a likely contributor to increased morbidity, frailty and susceptibility to death with age. Conversely, increased resilience across numerous physiological markers of function is associated with longevity and healthy aging. The variation in resilience in populations suggests biological and molecular regulatory mechanisms that might provide insight into interventions to improve resilience, healthy aging and longevity. In this session, speakers will provide insight regarding short-term assays of resilience in animal models that prove useful both in delineating these biological mechanisms as well as inform on potential translational models to better understand biological resilience in human populations. The sessions focus is on defining these assays and discussion of the biological relevance each resilience assay in terms of the regulation of aging. The goals of these studies range from identifying potential predictors of individual lifespan within markers of functional resilience to leveraging geroscience to define whether markers of resilience can be modified through interventions to the aging process. Moreover, better understanding of the biology of resilience could assist in defining novel interventions that improve resilience and thereby enhance longevity.

Factors Limiting Photosynthetic Recovery in Sweet Pepper Leaves After Short-Term Chilling Stress Under Low Irradiance

2004 ◽  
Vol 42 (2) ◽  
pp. 257-262 ◽  
Author(s):  
X. G. Li ◽  
X. M. Wang ◽  
Q. W. Meng ◽  
Q. Zou
Keyword(s):  
Chilling Stress ◽  
Sweet Pepper ◽  
Short Term ◽  
Pepper Leaves ◽  
Photosynthetic Recovery

Selenium Modifies the Effect of Short-Term Chilling Stress on Cucumber Plants

2010 ◽  
Vol 138 (1-3) ◽  
pp. 307-315 ◽  
Author(s):  
Barbara Hawrylak-Nowak ◽  
Renata Matraszek ◽  
Maria Szymańska
Keyword(s):  
Chilling Stress ◽  
Short Term

scholarly journals Response to chilling in cucumber (Cucumis sativus L.) plants treated with triacontanol and Asahi SL.

2012 ◽  
Vol 62 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Edward Borowski
Keyword(s):  
Chilling Stress ◽  
Growth Conditions ◽  
Proline Content ◽  
Experimental Series ◽  
The Other ◽  
Fluorescent Light ◽  
Guaiacol Peroxidase ◽  
Free Proline ◽  
Short Term ◽  
Cucumis Sativus L

In pot experiments on cucumber cv. Śremski F<sub>1</sub>, the effect of short-term chilling on plants earlier treated with triacontanol (TRIA) and Asahi SL was investigated. These plants were grown in a phytotron at an air temperature of 27/22<sup>°</sup>C (day/night), using fluorescent light with far flux density of 220 µmol × m<sup>-2</sup> × s<sup>-1</sup>, with a photoperiod 16/8. At the 4th true leaf stage, the respective experimental series were sprayed with: 1) H<sub>2</sub>O - control, 2) TRIA 0.01, 3) TRIA 0.1, 4) TRIA 1.0 mg × dm<sup>-3</sup>, 5) Asahi SL 0.2, 6) Asahi SL 0.3%. After 24 hours one half of the plants from each experimental series was treated for a period of 3 days at a temperature of 12/6<sup>°</sup>C, with all the other growth conditions unchanged. The obtained results have shown that short-term chilling stress caused a significant increase in electrolyte leakage, free proline content and in the activity of guaiacol peroxidase in leaves, but a decrease in chlorophyll a+b content, stomatal conductance, transpiration, photosynthesis, leaf area and in the activity of catalase in leaves. The application of TRIA or ASAHI SL on leaves in the pre-stress period reduced the values of the traits which had been increased as a result of chilling and increased those which had reduced. Generally, TRIA was most effective at a concentration of 0.1 mg × dm<sup>-3</sup>, and Asahi SL at a concentration of 0.3%.

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