scholarly journals Vegetative support of functional reserves in the post-stress recovery period

2019 ◽  
Author(s):  
Marina Butakova ◽  
Andrey Gryaznikh ◽  
Maria Kiseleva
Keyword(s):  
Recovery Period ◽  
Stress Recovery ◽  
Functional Reserves ◽  
Post Stress

scholarly journals Maize (Zea mays L.) landraces classified by drought stress tolerance at the seedling stage

2021 ◽  
pp. 29
Author(s):  
Víctor A. González Hernández ◽  
Eleazar Lugo Cruz ◽  
Leopoldo E. Mendoza Onofre ◽  
Amalio Santacruz Varela ◽  
Ma. Alejandra Gutiérrez Espinosa ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Water Deficit ◽  
Recovery Period ◽  
Shoot Biomass ◽  
Limiting Factor ◽  
Stress Recovery ◽  
Total Biomass ◽  
Maize Landraces ◽  
Post Stress

Drought is the main limiting factor for maize production, and climate change can aggravate this water scarcity. One way to mitigate this problem is to plant drought tolerance maize genotypes. In landrace maize grown under rainfed conditions there are drought-adapted genotypes, which can be used in breeding programs for drought tolerance. The objective of this study was to evaluate the effect of an early water deficit on the seedling growth of 41 maize landraces from Nuevo León, Mexico, plus seven varieties, by means of drought tolerance indices based on biomass accumulation during both stress and post-stress recovery period, for identifying tolerant and susceptible genotypes. This study was performed at 2016 in Texcoco, Mexico (19°27’N, 98°54’W, 2241 masl). In the greenhouse, 96 treatments were compared (48 genotypes × two soil water regimes: without and with drought) under randomized complete blocks experimental design. After the drought stress period, normal irrigation was resumed for 15 days for recovery. In maize landraces there is genetic diversity in drought tolerance. Landraces GalTrini and SITexas outstanded as the most water deficit tolerant, whereas landraces Berrones, Rodeo, Sabanilla, Carmen, AraTrini and the inbred line L65 were the most drought susceptible. The total biomass measured before water stress was not related to drought adaptability. This study demonstrates that the post stress recovery is more important in drought stress adaptability than the drought resistance, regarding root biomass, shoot biomass and total biomass. Thus, to include the post stress recovery in drought tolerance studies can produce a more precise genotypic classification for drought stress resistance and adaptability.

Human Stress Recovery during Exposure to Geranium Visual Stimuli

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 505b-505 ◽  
Author(s):  
Eunhee Kim ◽  
Richard H. Mattson
Keyword(s):  
Recovery Period ◽  
Visual Stimuli ◽  
Stress Recovery ◽  
Emotional States ◽  
Finger Skin Temperature ◽  
Physiological Indicators ◽  
Treatment Groups ◽  
Human Situation ◽  
Human Stress ◽  
Finger Skin

Evaluating human psychophysiological responses to plant visual stimuli provides a clearer understanding of factors within plant environments that enhance or maximize recovery from stress. Advances in physiological monitoring technology allow continuous recording and more-refined data collection of human responses to environmental stimuli. The objective of this study was to compare effects on stress recovery by exposures to geranium visual stimuli following an induced stressor, by measuring changes in physiological indicators and emotional states. One-hundred-fifty college students were randomly assigned to one of three treatment groups: red-flowering geraniums, non-flowering geraniums, or no geraniums. Each student viewed a 10-min film of a stressful human situation following a 5-min baseline, then was exposed to an assigned treatment setting during a 5-min recovery period. Continuous physiological measurements were taken of brainwave activities (EEG), skin conductance (EDR), and finger skin temperature. Self-rating scores of subjects' feelings were taken using the Zuckerman Inventory of Personal Reactions. Comparisons among treatment groups will be discussed based on gender and other demographic factors.

scholarly journals Influence of abiotic stress during soybean germination followed by recovery on the phenolic compounds of radicles and their antioxidant capacity

2014 ◽  
Vol 83 (3) ◽  
pp. 209-218 ◽  
Author(s):  
Sylwia Swigonska ◽  
Ryszard Amarowicz ◽  
Angelika Król ◽  
Agnieszka Mostek ◽  
Anna Badowiec ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Phenolic Compounds ◽  
Osmotic Stress ◽  
Antioxidant Capacity ◽  
Secondary Metabolism ◽  
Phenolic Acids ◽  
Stress Factors ◽  
Stress Recovery ◽  
Soybean Seeds ◽  
Post Stress

Abiotic stress factors are among the major causes of lower crop yields. It is known, that in response to cold and/or osmotic stress, crops activate various defense mechanisms, including morphological, physiological and metabolic adaptations. Secondary metabolism, especially phenolic compounds, seem to be an important factor of stress-induced metabolic re-engineering as their levels are alternated by abiotic stress in plants. Despite the fact, that the nature and function of phenolic compounds was already studied in various plant species, it is important to define tissue-specific changes induced by two most potent abiotic stressors – low temperature and decreased water potential. Moreover, in fields, the appearance of single stress is rather rare. Usually two or more factors are acting in parallel, which may potentially result in different effects. Therefore, the aim of this study was to analyze selected elements of secondary metabolism in roots of germinating soybean seeds under cold stress, osmotic stress and both stresses combined. In addition the effects of constant and persistent stress were compared to those induced by sudden and brief stress appearance, as well as after the post-stress recovery process. In the presented study standard methods for identification and quantification of phenolic acids and isoflavones were used and the antioxidant capacity of the radicle extracts was measured. The phenolic metabolism in plants was greatly intensified in response to cold and osmotic stress and remained at high level during the post-stress recovery. The amount and composition of both phenolic acids and identified isoflavones also changed in stress- and duration-dependent manner. This proves an important role of phenolic compounds in abiotic stress response of germinating soybean seeds and opens up new perspectives for further investigations.

scholarly journals Beyond the extreme: recovery of carbon and water relations in woody plants following heat and drought stress

2019 ◽  
Vol 39 (8) ◽  
pp. 1285-1299 ◽  
Author(s):  
Nadine K Ruehr ◽  
Rüdiger Grote ◽  
Stefan Mayr ◽  
Almut Arneth
Keyword(s):  
Heat Stress ◽  
Gas Exchange ◽  
Water Relations ◽  
Woody Plants ◽  
Leaf Gas Exchange ◽  
Experimental Studies ◽  
Drought Severity ◽  
Stress Recovery ◽  
Mild Stress ◽  
Post Stress

Abstract Plant responses to drought and heat stress have been extensively studied, whereas post-stress recovery, which is fundamental to understanding stress resilience, has received much less attention. Here, we present a conceptual stress-recovery framework with respect to hydraulic and metabolic functioning in woody plants. We further synthesize results from controlled experimental studies following heat or drought events and highlight underlying mechanisms that drive post-stress recovery. We find that the pace of recovery differs among physiological processes. Leaf water potential and abscisic acid concentration typically recover within few days upon rewetting, while leaf gas exchange-related variables lag behind. Under increased drought severity as indicated by a loss in xylem hydraulic conductance, the time for stomatal conductance recovery increases markedly. Following heat stress release, a similar delay in leaf gas exchange recovery has been observed, but the reasons are most likely a slow reversal of photosynthetic impairment and other temperature-related leaf damages, which typically manifest at temperatures above 40 °C. Based thereon, we suggest that recovery of gas exchange is fast following mild stress, while recovery is slow and reliant on the efficiency of repair and regrowth when stress results in functional impairment and damage to critical plant processes. We further propose that increasing stress severity, particular after critical stress levels have been reached, increases the carbon cost involved in reestablishing functionality. This concept can guide future experimental research and provides a base for modeling post-stress recovery of carbon and water relations in trees.

scholarly journals The influence of plant species richness on stress recovery of humans

Web Ecology ◽  
2018 ◽  
Vol 18 (2) ◽  
pp. 121-128 ◽  
Author(s):  
Petra Lindemann-Matthies ◽  
Diethart Matthies
Keyword(s):  
Blood Pressure ◽  
Species Richness ◽  
Plant Species ◽  
Landscape Management ◽  
Plant Species Richness ◽  
Stress Recovery ◽  
Intermediate Species ◽  
Bare Ground ◽  
Relaxation Period ◽  
Post Stress

Abstract. Natural sceneries or single plants may have positive influences on human health. Here we show that plant species richness can positively influence recovery from stress. Meadow-like arrays of different species richness (1, 16, 32, 64 species) were presented to visitors (n=171) of a popular park in Zurich, Switzerland (one array per participant). Participants' systolic blood pressure was measured twice: directly after they had been stressed and once again after a 2 min post-stress relaxation period during which they looked at one of either the meadow-like arrangements of plants in pots or at bare ground, shielded on three sides by a tent-like structure. The decrease in blood pressure was larger when respondents could view an arrangement of plants instead of ground without vegetation. Relaxation was strongest at intermediate species richness (32 species). Age, gender, and a person's attachment to nature did not influence relaxation. Our results indicate that species-rich vegetation may contribute to recovery from stress which should be considered in landscape management and planning.

scholarly journals HDAC6 regulates sensitivity to cell death in response to stress and post-stress recovery

2017 ◽  
Vol 22 (2) ◽  
pp. 253-261 ◽  
Author(s):  
Hyun-Wook Ryu ◽  
Hye-Rim Won ◽  
Dong Hoon Lee ◽  
So Hee Kwon
Keyword(s):  
Cell Death ◽  
Stress Recovery ◽  
Response To Stress ◽  
Post Stress

Nanosilicon-based recovery of barley (Hordeum vulgare) plants subjected to drought stress

2020 ◽  
Vol 7 (2) ◽  
pp. 443-461 ◽  
Author(s):  
Mansour Ghorbanpour ◽  
Hamid Mohammadi ◽  
Khalil Kariman
Keyword(s):  
Drought Stress ◽  
Hordeum Vulgare ◽  
Vegetative Growth ◽  
Silicon Nanoparticles ◽  
Stress Recovery ◽  
Recovery Performance ◽  
Potential Impact ◽  
Post Stress

The study explores the potential impact of silicon nanoparticles (Si NPs), in comparison with their bulk counterpart (silicate), on post-stress recovery performance of barley (Hordeum vulgare) seedlings under different drought stress intensities during vegetative growth.

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