scholarly journals Interactive effects of drought and pathogens in forest trees

2006 ◽  
Vol 63 (6) ◽  
pp. 597-612 ◽  
Author(s):  
Marie-Laure Desprez-Loustau ◽  
Benoit Marçais ◽  
Louis-Michel Nageleisen ◽  
Dominique Piou ◽  
Andrea Vannini
Keyword(s):  
Interactive Effects ◽  
Forest Trees ◽  
Effects Of Drought

scholarly journals Interactive effects of ambient ozone and climate measured on growth of mature loblolly pine trees

1996 ◽  
Vol 26 (4) ◽  
pp. 670-681 ◽  
Author(s):  
S.B. McLaughlin ◽  
D.J. Downing
Keyword(s):  
Soil Moisture ◽  
Loblolly Pine ◽  
Moisture Stress ◽  
Growth Patterns ◽  
Forest Growth ◽  
Interactive Effects ◽  
Forest Trees ◽  
Short Term ◽  
Data Set ◽  
Ambient Ozone

Seasonal growth patterns of mature loblolly pine (Pinustaeda L.) trees over the interval 1988–1993 have been analyzed to evaluate the effects of ambient ozone on growth of large forest trees. Patterns of stem expansion and contraction of 34 trees were examined using serial measurements with sensitive dendrometer band systems. Study sites, located in eastern Tennessee, varied significantly in soil moisture, soil fertility, and stand density. Levels of ozone, rainfall, and temperature varied widely over the 6-year study interval. Regression analysis identified statistically significant influences of ozone on stem growth patterns, with responses differing widely among trees and across years. Ozone interacted with both soil moisture stress and high temperatures, explaining 63% of the high frequency, climatic variance in stem expansion identified by stepwise regression of the 5-year data set. Observed responses to ozone were rapid, typically occurring within 1–3 days of exposure to ozone at ≥40 ppb and were significantly amplified by low soil moisture and high air temperatures. Both short-term responses, apparently tied to ozone-induced increases in whole-tree water stress, and longer term cumulative responses were identified. These data indicate that relatively low levels of ambient ozone can significantly reduce growth of mature forest trees and that interactions between ambient ozone and climate are likely to be important modifiers of future forest growth and function. Additional studies of mechanisms of short-term response and interspecies comparisons are clearly needed.

scholarly journals Biochar addition alleviate the negative effects of drought and salinity stress on soybean productivity and water use efficiency

2020 ◽  
Author(s):  
Yaojun Zhang ◽  
Jiaqi Ding ◽  
Hong Wang ◽  
Lei Su ◽  
Cancan Zhao
Keyword(s):  
Grain Yield ◽  
Water Use Efficiency ◽  
Water Use ◽  
Salinity Stress ◽  
Crop Growth ◽  
Interactive Effects ◽  
Gaseous Exchange ◽  
Negative Effects ◽  
Use Efficiency ◽  
Effects Of Drought

Abstract Background: Environmental stress is a crucial factor restricting plant growth as well as crop productivity, thus influencing the agricultural sustainability. Biochar addition is proposed as an effective management to improve crop performance. However, there were few studies focused on the effect of biochar addition on crop growth and productivity under interactive effect of abiotic stress (e.g., drought and salinity). This study was conducted with a pot experiment to investigate the interaction effects of drought and salinity stress on soybean yield, leaf gaseous exchange and water use efficiency (WUE) under biochar addition. Results: Drought and salinity stress significantly depressed soybean phenology (e.g. flowering time) and all the leaf gas exchange parameters, but had inconsistent effects on soybean root growth and WUE at leaf and yield levels. Salinity stress significantly decreased photosynthetic rate, stomatal conductance, intercellular CO2 concentration and transpiration rate by 20.7%, 26.3%, 10.5% and 27.2%, respectively. Lower biomass production and grain yield were probably due to the restrained photosynthesis under drought and salinity stress. Biochar addition significantly enhanced soybean grain yield by 3.1-14.8%. Drought stress and biochar addition significantly increased WUE-yield by 27.5% and 15.6%, respectively, while salinity stress significantly decreased WUE-yield by 24.2%. Drought and salinity stress showed some negative interactions on soybean productivity and leaf gaseous exchange. But biochar addition alleviate the negative effects on soybean productivity and water use efficiency under drought and salinity stress. Conclusions: The results of the present study indicated that drought and salinity stress could significantly depress soybean growth and productivity. There exist interactive effects of drought and salinity stress on soybean productivity and water use efficiency, while we could employ biochar to alleviate the negative effects. We should consider the interactive effects of different abiotic restriction factors on crop growth thus for sustainable agriculture in the future.

scholarly journals Individual and interactive effects of drought and heat on leaf physiology of seedlings in an economically important crop

AoB Plants ◽  
2016 ◽  
pp. plw090 ◽  
Author(s):  
Honglang Duan ◽  
Jianping Wu ◽  
Guomin Huang ◽  
Shuangxi Zhou ◽  
Wenfei Liu ◽  
...  
Keyword(s):  
Interactive Effects ◽  
Leaf Physiology ◽  
Important Crop ◽  
Effects Of Drought

scholarly journals Interactive effects of drought, organic fertilizer, and zinc oxide nanoscale and bulk particles on wheat performance and grain nutrient accumulation

2020 ◽  
Vol 722 ◽  
pp. 137808 ◽  
Author(s):  
Christian O. Dimkpa ◽  
Joshua Andrews ◽  
Joaquin Sanabria ◽  
Prem S. Bindraban ◽  
Upendra Singh ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Organic Fertilizer ◽  
Interactive Effects ◽  
Nutrient Accumulation ◽  
Effects Of Drought

Interactive effects of drought, elevated CO2 and warming on photosynthetic capacity and photosystem performance in temperate heath plants

2011 ◽  
Vol 168 (13) ◽  
pp. 1550-1561 ◽  
Author(s):  
Kristian Rost Albert ◽  
Teis N. Mikkelsen ◽  
Anders Michelsen ◽  
Helge Ro-Poulsen ◽  
Leon van der Linden
Keyword(s):  
Elevated Co2 ◽  
Photosynthetic Capacity ◽  
Interactive Effects ◽  
Effects Of Drought
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