scholarly journals Continuous Isoprene Measurements in a UK Temperate Forest for a Whole Growing Season: Effects of Drought Stress During the 2018 Heatwave

2020 ◽  
Vol 47 (15) ◽  
Author(s):  
Valerio Ferracci ◽  
Conor G. Bolas ◽  
Ray A. Freshwater ◽  
Zosia Staniaszek ◽  
Thomas King ◽  
...  
Keyword(s):  
Drought Stress ◽  
Temperate Forest ◽  
Growing Season ◽  
Effects Of Drought

scholarly journals Does Drought Stress on Seedlings Have Longer Term Effects on Sapling Phenology, Reshooting, Growth and Plant Architecture in Quercus robur, Q. petraea and Their Morphological Intermediates?

Forests ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 1012 ◽  
Author(s):  
Kristine Vander Mijnsbrugge ◽  
Arion Turcsan ◽  
Stefaan Moreels ◽  
Michiel Van Goethem ◽  
Steven Meeus ◽  
...  
Keyword(s):  
Drought Stress ◽  
Quercus Robur ◽  
Western Europe ◽  
Plant Architecture ◽  
Growing Season ◽  
Treated Group ◽  
Sympatric Species ◽  
Drought Treatment ◽  
After Effects ◽  
Effects Of Drought

Background and Objectives: Summer droughts are expected to increase in central and western Europe both in terms of frequency and intensity, justifying studies on longer term legacies of drought stress on tree species and their hybrids. Materials and Methods: We studied the longer-term after effects of water withholding and re-watering in the first growing season of potted seedlings from the sympatric species Quercus robur L., Q. petraea (Matt.) Liebl. and their morphological intermediates. Phenology, growth, and plant architecture were examined after a cut-back of the stems at the end of the third growing season. Results: The legacy of the first-year water limitation is faded in the phenological response. Nonetheless, leaf senescence occurred later in offspring from Q. robur than in offspring from Q. petraea at the end of the fourth growing season and leafing out tended to be later in the subsequent growing season. Offspring from the intermediate forms displayed variable phenological responses. Height and radial growth were still affected by the drought stress in a taxon-dependent way, with the offspring from Q. petraea displaying growth reduction both in height and diameter, whereas offspring from Q. robur did not show any differences anymore between control and treated plants, demonstrating better post-stress recovery in Q. robur. Offspring from morphological intermediates responded again in a variable way. Although the number of reshoots after cutting back the stems was not affected anymore by the drought treatment in the first growing season, the number of side shoots on the reshoots was still reduced in the drought treated group of plants, independent of the taxon of the mother tree. Conclusions: Together, our results demonstrate the longer-lasting effects of drought stress on oak saplings with regard to growth and plant architecture, with the first being taxon dependent.

Impact of transpiration rates on foliar silicon concentrations across a range of angiosperm species exposed to water stress.

2021 ◽  
Author(s):  
Thomas Guzman ◽  
Regis Burlett ◽  
Camille Delvigne ◽  
Camille Parise ◽  
Sabrina Dubois ◽  
...  
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Growing Season ◽  
Plant Water ◽  
Water Fluxes ◽  
Evergreen Species ◽  
Positive Effects ◽  
First Results ◽  
Effects Of Drought ◽  
The Relationship

<p>It is widely observed that silicon availability (Si) can enhance plant growth and increase the tolerance of plants to a range of biotic and abiotic stresses, although the specific mechanisms underlying these positive effects are not always understood. Silicon is acquired by plants both actively via transporters located in roots and/or passively as plants transport water during transpiration. The relative importance of each of these mechanisms depends strongly on the plant species and the level of stress experienced by the plant. Currently there is a lively debate in the literature regarding the relationship between plant Si accumulation and transpiration rates. Rates of transpiration can affect the amount of Si moving through a plant and in turn the concentration of available Si in soils can make the plant less vulnerable to the effects of drought stress. In order to better understand these relationships between plant water fluxes and Si accumulation in leaves, nine angiosperm tree species (from five families including both deciduous and evergreen species) were grown in a greenhouse and exposed to contrasting watering treatments. For each species, three trees were well watered throughout the growing season whilst three others were exposed to water stress. Whole plant transpiration fluxes were monitored continuously with balances, and pre-dawn leaf water potentials were measured regularly during the experiment. In addition the foliar Si concentrations of each plant were measured by ICP-AES after alkaline fusion both at the beginning and the middle of the growing season. In this presentation, we show our first results examining the relationship between leaf Si concentrations and plant water fluxes in contrasting species. We tested the hypothesis that drought stress significantly decreased the foliar Si concentration in all of the species measured and that foliar Si concentrations were correlated with the cumulative transpiration rates of plants and thus expected to increase significantly over the growing season. </p>

Effects of drought stress on growth, photosynthesis and alkaloid accumulation of Lycoris aurea

2020 ◽  
Vol 52 (4) ◽  
Author(s):  
Juan Liang ◽  
Miaohua Quan ◽  
Chaowen She ◽  
Anna He ◽  
Xiaoliang Xiang ◽  
...  
Keyword(s):  
Drought Stress ◽  
Lycoris Aurea ◽  
Effects Of Drought

Effects of Drought Stress on Physiological Characteristics and Dry Matter Production in Maize Silking Stage

2013 ◽  
Vol 38 (10) ◽  
pp. 1884-1890 ◽  
Author(s):  
Ren-He ZHANG ◽  
Dong-Wei GUO ◽  
Xing-Hua ZHANG ◽  
Hai-Dong LU ◽  
Jian-Chao LIU ◽  
...  
Keyword(s):  
Drought Stress ◽  
Dry Matter ◽  
Physiological Characteristics ◽  
Dry Matter Production ◽  
Matter Production ◽  
Effects Of Drought

Effects of Drought Stress on Photosynthetic Characteristics of Maize Hybrids at Seedling Stage

2015 ◽  
Vol 41 (1) ◽  
pp. 154 ◽  
Author(s):  
Xing-Hua ZHANG ◽  
Jie GAO ◽  
Wei-Li DU ◽  
Ren-He ZHANG ◽  
Ji-Quan XUE
Keyword(s):  
Drought Stress ◽  
Photosynthetic Characteristics ◽  
Seedling Stage ◽  
Maize Hybrids ◽  
Effects Of Drought

The Effects of Drought on Leaf Gas Exchange and Growth of Three Species of Herbaceous Perennials

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 540a-540
Author(s):  
K.J. Prevete ◽  
R.T. Fernandez
Keyword(s):  
Drought Stress ◽  
Stomatal Conductance ◽  
Gas Exchange ◽  
Drought Tolerance ◽  
Transpiration Rate ◽  
Leaf Gas Exchange ◽  
Gas Analysis ◽  
Herbaceous Perennials ◽  
Effects Of Drought ◽  
Analysis System

Three species of herbaceous perennials were tested on their ability to withstand and recover from drought stress periods of 2, 4, and 6 days. Eupatorium rugosum and Boltonia asteroides `Snowbank' were chosen because of their reported drought intolerance, while Rudbeckia triloba was chosen based on its reported drought tolerance. Drought stress began on 19 Sept. 1997. Plants were transplanted into the field the day following the end of each stress period. The effects of drought on transpiration rate, stomatal conductance, and net photosynthetic rate were measured during the stress and throughout recovery using an infrared gas analysis system. Leaf gas exchange measurements were taken through recovery until there were no differences between the stressed plants and the control plants. Transpiration, stomatal conductance, and photosynthesis of Rudbeckia and Boltonia were not affected until 4 days after the start of stress. Transpiration of Eupatorium decreased after 3 days of stress. After rewatering, leaf gas exchange of Boltonia and Rudbeckia returned to non-stressed levels quicker than Eupatorium. Growth measurements were taken every other day during stress, and then weekly following transplanting. Measurements were taken until a killing frost that occurred on 3 Nov. There were no differences in the growth between the stressed and non-stressed plants in any of the species. Plants will be monitored throughout the winter, spring, and summer to determine the effects of drought on overwintering capability and regrowth.

Involvement of dehydrin proteins in mitigating the negative effects of drought stress in plants

2021 ◽  
Author(s):  
Riyazuddin Riyazuddin ◽  
Nisha Nisha ◽  
Kalpita Singh ◽  
Radhika Verma ◽  
Ravi Gupta
Keyword(s):  
Drought Stress ◽  
Negative Effects ◽  
Effects Of Drought

Penconazole and calcium ameliorate drought stress in canola by upregulating the antioxidative enzymes

2020 ◽  
Vol 47 (9) ◽  
pp. 825 ◽  
Author(s):  
Maryam Rezayian ◽  
Vahid Niknam ◽  
Hassan Ebrahimzadeh
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Antioxidative Enzymes ◽  
Proline Content ◽  
Fresh Weight ◽  
Negative Effects ◽  
Mda Content ◽  
Effects Of Drought

The aim of this research was to gauge the alternations in the lipid peroxidation and antioxidative enzyme activity in two cultivars (cv. RGS003 and cv. Sarigol) of canola under drought stress and drought tolerance amelioration by penconazole (PEN) and calcium (Ca). Plants were treated with different polyethylene glycol (PEG) concentrations (0, 5, 10 and 15%) without or with PEN (15 mg L–1) and Ca (15 mM). The Ca treatment prevented the negative effects of drought on fresh weight (FW) in RGS003 and Sarigol at 5 and 15% PEG respectively. Ca and PEN/Ca treatments caused significant induction in the proline content in Sarigol at 15% PEG; the latter treatment was accompanied by higher glycine betaine (GB), lower malondialdehyde (MDA) and growth recovery. Hydrogen peroxide (HO2) content in Sarigol was proportional to the severity of drought stress and all PEN, Ca and PEN/Ca treatments significantly reduced the H2O2 content. PEN and PEN/Ca caused alleviation of the drought-induced oxidative stress in RGS003. RGS003 cultivar exhibited significantly higher antioxidative enzymes activity at most levels of drought, which could lead to its drought tolerance and lower MDA content. In contrast to that of Sarigol, the activity of catalase and superoxide dismutase (SOD) increased with Ca and PEN/Ca treatments in RGS003 under low stress. The application of PEN and Ca induced significantly P5CS and SOD expression in RGS003 under drought stress after 24 h. Overall, these data demonstrated that PEN and Ca have the ability to enhance the tolerance against the drought stress in canola plants.

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