Quantifying individual and interactive effects of elevated temperature and drought stress on cotton yield and fibre quality

2020 ◽  
Author(s):  
Min Gao ◽  
Bingjie Xu ◽  
Youhua Wang ◽  
Zhiguo Zhou ◽  
Wei Hu
Keyword(s):  
Elevated Temperature ◽  
Drought Stress ◽  
Interactive Effects ◽  
Fibre Quality ◽  
Cotton Yield

scholarly journals Interactive effects of elevated CO2 and drought stress on leaf water potential and growth in Caragana intermedia

Trees ◽  
2005 ◽  
Vol 19 (6) ◽  
pp. 712-721 ◽  
Author(s):  
Chun-Wang Xiao ◽  
Osbert J. Sun ◽  
Guang-Sheng Zhou ◽  
Jing-Zhu Zhao ◽  
Gang Wu
Keyword(s):  
Drought Stress ◽  
Water Potential ◽  
Elevated Co2 ◽  
Leaf Water Potential ◽  
Leaf Water ◽  
Interactive Effects ◽  
Caragana Intermedia

Leaf structural responses to pre-industrial, current and elevated atmospheric [CO2] and temperature affect leaf function in Eucalyptus sideroxylon

2012 ◽  
Vol 39 (4) ◽  
pp. 285 ◽  
Author(s):  
Renee A. Smith ◽  
James D. Lewis ◽  
Oula Ghannoum ◽  
David T. Tissue
Keyword(s):  
Elevated Temperature ◽  
Photosynthetic Capacity ◽  
Leaf Structure ◽  
Atmospheric Co2 ◽  
Interactive Effects ◽  
Effect Of Temperature ◽  
Leaf Mass Per Area ◽  
Climate Change Research ◽  
Photosynthetic Responses ◽  
Eucalyptus Sideroxylon

Leaf structure and chemistry both play critical roles in regulating photosynthesis. Yet, a key unresolved issue in climate change research is the role of changes in leaf structure in photosynthetic responses to temperature and atmospheric CO2 concentration ([CO2]), ranging from pre-industrial to future levels. We examined the interactive effects of [CO2] (290, 400 and 650 μL L–1) and temperature (ambient, ambient +4°C) on leaf structural and chemical traits that regulate photosynthesis in Eucalyptus sideroxylon A.Cunn. ex Woolls. Rising [CO2] from pre-industrial to elevated levels increased light-saturated net photosynthetic rates (Asat), but reduced photosynthetic capacity (Amax). Changes in leaf N per unit area (Narea) and the number of palisade layers accounted for 56 and 14% of the variation in Amax, respectively, associated with changes in leaf mass per area. Elevated temperature increased stomatal frequency, but did not affect Amax. Further, rising [CO2] and temperature generally did not interactively affect leaf structure or function. These results suggest that leaf Narea and the number of palisade layers are the key chemical and structural factors regulating photosynthetic capacity of E. sideroxylon under rising [CO2], whereas the lack of photosynthetic responses to elevated temperature may reflect the limited effect of temperature on leaf structure and chemistry.

Effect of Elevated Temperature and Drought Stress on Growth of Lycium barbarum

2013 ◽  
Vol 864-867 ◽  
pp. 2435-2439
Author(s):  
Qin Zhao ◽  
Jing Pan ◽  
Bing Cao
Keyword(s):  
Elevated Temperature ◽  
Drought Stress ◽  
Soil Drought ◽  
Seedling Height ◽  
Lycium Barbarum ◽  
Morphological Response ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
One Year ◽  
Root Collar

to test the Effect of elevated temperature and drought stress on growth of Lycium barbarum, the one-year-old seedling of L. barbarum were planted in ambient temperature condition or elevated temperature (2.5~3.7°Cabove ) condition using open top chambers for one growing season. The seedling height, root-collar diameter, new shots length and diameter etc. were tested to analyze the morphological response of L. barbarum to climate change. The result showed that soil drought stress reduced the height, root-collar, and new shot diameter growth of L. barbarum seedling, and elevated temperature increased the root-collar growth of L. barbarum seedling. The effect of elevated temperature on seedling height and new shot growth depended on the soil moisture condition.

scholarly journals Hot and bothered: effects of elevated Pco2 and temperature on juvenile freshwater mussels

2018 ◽  
Vol 315 (1) ◽  
pp. R115-R127 ◽  
Author(s):  
Jennifer D. Jeffrey ◽  
Kelly D. Hannan ◽  
Caleb T. Hasler ◽  
Cory D. Suski
Keyword(s):  
Elevated Temperature ◽  
Freshwater Mussels ◽  
Physiological Responses ◽  
Environmental Stressors ◽  
Interactive Effects ◽  
Mrna Levels ◽  
Acid Base ◽  
Consumption Rates ◽  
The Individual ◽  
Measured Exposure

Multiple environmental stressors may interact in complex ways to exceed or diminish the impacts of individual stressors. In the present study, the interactive effects of two ecologically relevant stressors [increased temperature and partial pressure of carbon dioxide (Pco2)] were assessed for freshwater mussels, a group of organisms that are among the most sensitive and rapidly declining worldwide. The individual and combined effects of elevated temperature (22°C–34°C) and Pco2 (~230, 58,000 µatm) on juvenile Lampsilis siliquoidea were quantified over a 5- or 14-day period, during which physiological and whole animal responses were measured. Exposure to elevated temperature induced a series of physiological responses, including an increase in oxygen consumption rates following 5 days of exposure at 31°C and an increase in carbonic anhydrase ( ca) and heat shock protein 70 mRNA levels following 14 days of exposure at 28°C and 34°C, respectively. Treatment with elevated Pco2 activated acid-base regulatory responses including increases in CA and Na+-K+-ATPase activity and a novel mechanism for acid-base regulation during Pco2 exposure in freshwater mussels was proposed. Thermal and CO2 stressors also interacted such that responses to the thermal stressor were diminished in mussels exposed to elevated Pco2, resulting in the greatest level of mortality. Additionally, larger mussels were more likely to survive treatment with elevated Pco2 and/or temperature. Together, exposure to elevated Pco2 may compromise the ability of juvenile freshwater mussels to respond to additional stressors, such as increased temperatures, highlighting the importance of considering not only the individual but also the interactive effects of multiple environmental stressors.

scholarly journals Interactive effects of water limitation and elevated temperature on the physiology, development and fitness of diverse accessions of Brachypodium distachyon

2016 ◽  
Vol 214 (1) ◽  
pp. 132-144 ◽  
Author(s):  
David L. Des Marais ◽  
Jesse R. Lasky ◽  
Paul E. Verslues ◽  
Trent Z. Chang ◽  
Thomas E. Juenger
Keyword(s):  
Elevated Temperature ◽  
Brachypodium Distachyon ◽  
Interactive Effects ◽  
Water Limitation

scholarly journals Effect of Foliar Application with Salicylic Acid on Some Morphological and Physiological Characteristics of Sesame (Sesamum indicum L.) Under Drought Stress

2016 ◽  
Vol 49 (4) ◽  
pp. 35-42 ◽  
Author(s):  
A. Khatiby ◽  
F. Vazin ◽  
M. Hassanzadeh ◽  
A. Ahmadi Shadmehri
Keyword(s):  
Salicylic Acid ◽  
Water Stress ◽  
Drought Stress ◽  
Foliar Application ◽  
Morphological Characteristics ◽  
Interactive Effects ◽  
Area Index ◽  
Physiological Processes ◽  
Significant Difference ◽  
Four Levels

Abstract Drought is an important factor that could restrict plants growth and productivity through several biological and physiological processes. Salicylic acid (SA) has a key role in many physiological processes of plants and stimulate specific responses against various stresses biotic and abiotic, in some of plants. In order to evaluate the effect of foliar application by salicylic acid (SA) under drought stress on some morphological characteristics sesame, a split-plot experiment with a completely random design with three replications was performed. There were three levels of irrigation: control (normal irrigations), water stress at flowering stage and water stress at seed production stage, as main plot and sub plot consisting of four levels of the foliar application of salicylic acid: 0 (control), 1, 1.5 and 2.25 mM. Results indicated that the effects of water stress on traits, such as plant height, height of first capsule from soil surface, number of branches, number of capsules per plant showed significant difference at a level of 1%, while on the number of seeds per capsule, seed weight, leaf area index, biological yield, grain yield sesame, without significant difference indicated. Foliar application with salicylic acid was not so significant (P< 0.05) at different concentrations on measured traits, as well as interactive effects between drought stress and different amounts of salicylic acid, without significant difference observed.

Interactive Effects of Salt and Drought Stresses on Seed Germination of Ammopiptanthus mongolicus in Northwest China

2014 ◽  
Vol 614 ◽  
pp. 653-657 ◽  
Author(s):  
Xiao Xue Shen ◽  
Min Wei Chai ◽  
Rui Li Li ◽  
Guo Yu Qiu
Keyword(s):  
Drought Stress ◽  
Seed Germination ◽  
Constant Temperature ◽  
Germination Rate ◽  
Northwest China ◽  
Interactive Effects ◽  
Regression Coefficients ◽  
Ammopiptanthus Mongolicus ◽  
Salt And Drought Stresses

A study quantifying the role of the interactive effects of salt and drought stresses, generally co-occurred in deserts, on seed germination in Ammopiptanthus mongolicus was conducted in a constant temperature incubator. The experiment consisted of seven levels of salinity stress (0, 0.3, 0.6, 0.9, 1.2, 1.5 and 1.8% NaCl) as well as six drought stress levels (0, -0.2, -0.4, -0.8, -1.6 and-2.0 MPa PEG). Accordant to our expectations, the interactive effects of salinity and drought stresses were additive on seed germination percentages, germination rate, and germination energy; significant decreases were seen in all of them in response to increases in salt and/or drought stresses. Furthermore, regression coefficients of salinity (β1) were higher than drought (β2), indicating that salinity was the first factor, and drought was secondary for salt and drought mixed stresses.

scholarly journals Combined effects of ocean acidification and elevated temperature on feeding, growth, and physiological processes of Antarctic krill Euphausia superba

2021 ◽  
Vol 665 ◽  
pp. 1-18
Author(s):  
GK Saba ◽  
AB Bockus ◽  
CT Shaw ◽  
BA Seibel
Keyword(s):  
Elevated Temperature ◽  
Metabolic Rate ◽  
Ambient Temperature ◽  
Antarctic Krill ◽  
Ph Effect ◽  
Euphausia Superba ◽  
Low Ph ◽  
Interactive Effects ◽  
Growth And Survival ◽  
Key Species

Antarctic krill Euphausia superba is a key species in the Southern Ocean, where its habitat is projected to undergo continued warming and increases in pCO2. Experiments during 2 summer field seasons at Palmer Station, Antarctica, investigated the independent and interactive effects of elevated temperature and pCO2 (decreased pH) on feeding, growth, acid-base physiology, metabolic rate, and survival of adult Antarctic krill. Ingestion and clearance rates of chlorophyll were depressed under low pH (7.7) compared to ambient pH (8.1) after a 48 h acclimation period, but this difference disappeared after a 21 d acclimation. Growth rates were negligible and frequently negative, but were significantly more negative at high (3°C, -0.03 mm d-1) compared to ambient temperature (0°C, -0.01 mm d-1) with no effect of pH. Modest elevations in tissue total CO2 and tissue pH were apparent at low pH but were short-lived. Metabolic rate increased with temperature but was suppressed at low pH in smaller but not larger krill. Although effects of elevated temperature and/or decreased pH were mostly sublethal, mortality was higher at high temperature/low pH (58%) compared to ambient temperature/pH or ambient temperature/low pH (>90%). This study identified 3 dominant patterns: (1) shorter-term effects were primarily pH-dependent; (2) krill compensated for lower pH relatively quickly; and (3) longer-term effects on krill growth and survival were strongly driven by temperature with little to no pH effect.

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