Impact of root growth and hydraulic conductance on canopy carbon-water relations of young walnut trees ( Juglans regia L.) under drought

Jerszurki, Daniela; Couvreur, Valentin; Maxwell, Toby M.; Silva, Lucas C. R.; Matsumoto, Nicholas J.; Shackel, Kenneth A.; Souza, Jorge Luiz Moretti de; Hopmans, Jan W.

doi:10.1016/j.scienta.2017.08.051

Cited by 20 publications

(13 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to hydrogel soil amendment, soil physical, chemical and biological traits are enhanced with positive effects on the plant growth and development [231]. Through its application to soil, it increases the plant survival time under drought stress, which was decreased due to the loss of the water and the hydraulic conductance in soil [232]. The survival time of the plants was increased with the hydrogel application since it resulted in sufficient soil moisture.…”

Section: Hydrogel: a Water Absorbing Polymermentioning

confidence: 99%

Drought Stress Impacts on Plants and Different Approaches to Alleviate Its Adverse Effects

Seleiman

Al-Suhaibani

Ali

et al. 2021

Plants

896

383

View full text Add to dashboard Cite

Drought stress, being the inevitable factor that exists in various environments without recognizing borders and no clear warning thereby hampering plant biomass production, quality, and energy. It is the key important environmental stress that occurs due to temperature dynamics, light intensity, and low rainfall. Despite this, its cumulative, not obvious impact and multidimensional nature severely affects the plant morphological, physiological, biochemical and molecular attributes with adverse impact on photosynthetic capacity. Coping with water scarcity, plants evolve various complex resistance and adaptation mechanisms including physiological and biochemical responses, which differ with species level. The sophisticated adaptation mechanisms and regularity network that improves the water stress tolerance and adaptation in plants are briefly discussed. Growth pattern and structural dynamics, reduction in transpiration loss through altering stomatal conductance and distribution, leaf rolling, root to shoot ratio dynamics, root length increment, accumulation of compatible solutes, enhancement in transpiration efficiency, osmotic and hormonal regulation, and delayed senescence are the strategies that are adopted by plants under water deficit. Approaches for drought stress alleviations are breeding strategies, molecular and genomics perspectives with special emphasis on the omics technology alteration i.e., metabolomics, proteomics, genomics, transcriptomics, glyomics and phenomics that improve the stress tolerance in plants. For drought stress induction, seed priming, growth hormones, osmoprotectants, silicon (Si), selenium (Se) and potassium application are worth using under drought stress conditions in plants. In addition, drought adaptation through microbes, hydrogel, nanoparticles applications and metabolic engineering techniques that regulate the antioxidant enzymes activity for adaptation to drought stress in plants, enhancing plant tolerance through maintenance in cell homeostasis and ameliorates the adverse effects of water stress are of great potential in agriculture.

show abstract

Section: Hydrogel: a Water Absorbing Polymermentioning

confidence: 99%

Drought Stress Impacts on Plants and Different Approaches to Alleviate Its Adverse Effects

Seleiman

Al-Suhaibani

Ali

et al. 2021

Plants

896

383

View full text Add to dashboard Cite

show abstract

“…For instance, Aletà et al (2006) reported that 22 J. regia families from different regions showed variation in the carbon isotopic composition (δ 13 C) of leaves, implying differences in water use efficiency. High leaf δ 13 C associated with a low stomatal conductance is typical for plants attempting to cope with water stress, including walnuts (Aletà et al, 2006; Jerszurki et al, 2017). Previous studies have shown that proline, malondialdehyde (MDA), superoxide dismutase (SOD), and peroxidase (POD) activities play important roles in walnuts' responses to drought and salinity (Naser et al, 2010; Vahdati & Lotfi, 2009; Yang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Walnut (Juglans regia L.) is a perennial deciduous angiosperm that has received increasing interest during recent years due to its economic importance (Jerszurki et al, 2017;Karimi et al, 2018Karimi et al, , 2020. The growth of walnut is strongly affected by water stress, which induces a declined yield, small kernel size and low quality, and shoot dieback.…”

mentioning

confidence: 99%

Combined effects of water stress and salinity on growth, physiological, and biochemical traits in two walnut genotypes

Wang

Zhang

Pei

et al. 2021

Physiologia Plantarum

View full text Add to dashboard Cite

Due to its great economic value, walnut (Juglans regia L.) has received increasing attention during recent years. However, water stress and salinity limit walnut growth, production, and quality. We employed two walnut genotypes, precocious walnut, and late-bearing walnut, to investigate their growth, photosynthetic capacity, nonstructural carbohydrate contents, Cl − allocation, reactive oxygen species (ROS) accumulation, and osmotic regulation under water stress, salinity, and their combination.We found that late-bearing walnut showed higher total biomass and net photosynthetic rate, higher activities of antioxidant enzymes, higher osmoregulation, and lower ROS accumulation than precocious walnut under stressful conditions. In addition, late-bearing walnut restricted salt transport and allocated more Cl − into roots, whereas precocious walnut allocated more Cl − into leaves when exposed to salinity stress. These data collectively demonstrated that late-bearing walnut possesses better stress tolerance under water stress, salinity, and especially under their combination. Such knowledge of genotype-specific responses and tolerances to water stress and salinity is important for walnut plantation management under increasing drought and aggravated soil salinization occurring with climate change. | INTRODUCTIONWater is a crucial limiting resource of plant growth and production, and many areas are expected to experience decreased precipitation under climate change (Choat et al., 2018;Cook et al., 2015). Plants have different physiological and defense responses to lessen the damage under water stress, including changes in morphological and physiological traits to deal with water stress. For example, plants can change biomass allocation between roots and shoots under water-limited conditions

show abstract

“…studies of ≤1 day of duration (Estes et al 2018). Main plot: Log-linear representation of approximate space and time scales within which SPA structures and processes of interest (c) operate at the scale of: (1) molecules (glucose, cellulose, lipids) whose isotope ratios reflect physiological stress (Sperling et al 2017;Maxwell et al 2018b); (2) stomata, which regulate leaf carbon-water relations and ecophysiological performance (Medlyn et al 2017;Silva et al 2015a); (3) root surface, mycelium, and bacteria that influence nutrient acquisition and resource transfer (Jerszurki et al 2017;Averill et al 2019;Bomfim et al 2019); (4) Aboveground (AG) traits that affect physiological performance, competition for light, and gas exchange (Baldocchi et al 2018;Silva & Anand, 2013;Silva et al 2013a); (5) Belowground (BG) traits that control competition for water and nutrients and net resource flows in the soil (Lambers et al 2008;Silva et al 2013bSilva et al , 2015b; (6) community composition and facilitative interactions that shape ecosystem structure, recycling of resources, and response to disturbance (Hoffmann et al 2012;Rossatto et al 2012;Franco et al 2014;Paiva et al 2016); (7) landscape history shaped by geological and climatological processes that form pedogenic gradients that constrain ecosystem distribution and function (Wortham et al 2017;O'Geen et al 2018;Ward et al 2019;Hayes et al 2019) and animals, spanning several orders of magnitude in mass and size (Enquist 2002;Brown et al 2004;Elser et al 2010). Biological scaling has also been used to predict the functioning of ecosystems from morphological properties of dominant plant species (Boyce and Lee 2010) or from changes in species composition in response to climate fluctuations (Enquist et al 2015(Enquist et al , 2017.…”

Section: The Problem Of Pattern and Scalementioning

confidence: 99%

Soil-plant-atmosphere interactions: structure, function, and predictive scaling for climate change mitigation

Silva

Lambers

2020

Plant Soil

View full text Add to dashboard Cite

Background It is well established that the functioning of terrestrial ecosystems depends on biophysical and biogeochemical feedbacks occurring at the soil-plant-atmosphere (SPA) interface. However, dynamic biophysical and biogeochemical processes that operate at local scales are seldom studied in conjunction with structural ecosystem properties that arise from broad environmental constraints. As a result, the effect of SPA interactions on how ecosystems respond to, and exert influence on, the global environment remains difficult to predict. Scope We review recent findings that link structural and functional SPA interactions and evaluate their potential for predicting ecosystem responses to chronic environmental pressures. Specifically, we propose a quantitative framework for the integrated analysis of three major plant functional groups (evergreen conifers, broadleaf deciduous, and understory shrubs) and their distinct mycorrhizal symbionts under rising levels of carbon dioxide, changing climate, and disturbance regime. First, we explain how symbiotic and competitive strategies involving plants and soil microorganisms influence scale-free patterns of carbon, nutrient, and water use from individual organisms to landscapes. We then focus on the relationship between those patterns and structural traits such as specific leaf area, leaf area index, and soil physical and chemical properties that constrain root connectivity and canopy gas exchange. Finally, we use those relationships to predict how changes in ecosystem structure may affect processes that are important for climate stability. Conclusions On the basis of emerging ecological theory and empirical biophysical and biogeochemical knowledge, we propose ten interpretive hypotheses that serve as a primary set of hierarchical relationships (or scaling rules), by which local SPA interactions can be spatially and temporally aggregated to inform broad climate change mitigation efforts. To this end, we provide a series of numerical formulations that simplify the net outcome of complex SPA interactions as a first step towards anticipating shifts in terrestrial carbon, water, and nutrient cycles.

show abstract

Impact of root growth and hydraulic conductance on canopy carbon-water relations of young walnut trees ( Juglans regia L.) under drought

Cited by 20 publications

References 69 publications

Drought Stress Impacts on Plants and Different Approaches to Alleviate Its Adverse Effects

Drought Stress Impacts on Plants and Different Approaches to Alleviate Its Adverse Effects

Combined effects of water stress and salinity on growth, physiological, and biochemical traits in two walnut genotypes

Soil-plant-atmosphere interactions: structure, function, and predictive scaling for climate change mitigation

Contact Info

Product

Resources

About