Stomatal responses to drought stress

Pirasteh‐Anosheh, Hadi; Saed-Moucheshi, Armin; Pakniyat, Hassan; Pessarakli, Mohammad

doi:10.1002/9781119054450.ch3

Cited by 172 publications

(98 citation statements)

References 85 publications

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“…In both experiments, there was a tendency of growth in the accumulation of dry mass with the increase in salinity; analogously, an increase in dry matter content in plants under salt stress has also been observed in pepper (Piñero et al, 2014) and lettuce (Pérez-López et al, 2013), which may be attributed to the maintenance of high turgor in the tissues due to efficient stomatal closure (Pirasteh-Anosheh et al, 2016) and consequently greater CO 2 fixation.…”

Section: Cultivation Conduction and Nutrient Solution Managementsupporting

confidence: 58%

Production of parsley in hydroponic conditions under isosmotic brackish nutrient solutions

Martins

Júnior²,

Júnior³

et al. 2019

Ciênc. agrotec.

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Brackish waters may vary in their chemical compositions, interfering with different plant responses to stress; therefore, the present study aimed to evaluate the production components of parsley plants subjected to levels of electrical conductivity in nutrient solutions with an initial ECns of 1.58 dS m-1, which was solubilized in water with the following water electrical conductivity configurations (ECw): 0.12 (control), 1.12, 2.12, 3.12, 4.12 and 5.12 dS m-1, resulting in six isosmotic levels (ECns = 1.7, 2.7, 3.7, 4.7, 5.7 and 6.7 dS m-1) in an interaction with four types of salt: NaCl, CaCl2, MgCl2 and KCl. The experimental design was completely randomized in a factorial scheme with five replicates. Two strategies were used to restore the volume consumed by the parsley plants, and the replacement was made with municipal-supply water (ECa = 0.12 dS m-1) in the first strategy and with the respective brackish waters in the second strategy. The total fresh and dry weights of the shoots and roots were evaluated as well as the total dry mass percentage of the shoots and roots. The responses of the plants to the different cationic natures was more evident at the highest levels of electrical conductivity tested, and the use of municipal-supply water to replace the evapotranspired depth mitigated the deleterious effects of salinity. In addition, greater reductions were observed in the fresh and dry mass when the replacement of the volume consumed was with the brackish waters.

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Section: Cultivation Conduction and Nutrient Solution Managementsupporting

confidence: 58%

Production of parsley in hydroponic conditions under isosmotic brackish nutrient solutions

Martins

Júnior²,

Júnior³

et al. 2019

Ciênc. agrotec.

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“…Cardinal was the most susceptible to water stress and was found to have reduced stomatal conductance (gs). There are many pathways that induce stomatal closure, which has negative effects on CO 2 absorption, photosynthesis, transpiration, cooling, and water [48]. These pathways can be divided into hydro-passive and active stomatal closure [48].…”

Section: Discussionmentioning

confidence: 99%

Transcriptome Profiles of Contrasting Potato (Solanum tuberosum L.) Genotypes Under Water Stress

Barra¹,

Meneses

Riquelme³

et al. 2019

Agronomy

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The potato is susceptible to water stress at all stages of development. We examined four clones of tetraploid potato, Cardinal, Desirée, Clone 37 FB, and Mije, from the germplasm bank of the National Institute of Agricultural Research (INIA) in Chile. Water stress was applied by suspending irrigation at the beginning of tuberization. Stomatal conductance, and tuber and plant fresh and dry weight were used to categorize water stress tolerance. Cardinal had a high susceptibility to water stress. Desirée was less susceptible than Cardinal and had some characteristics of tolerance. Mije had moderate tolerance and Clone 37 FB had high tolerance. Differential gene expression in leaves from plants with and without water stress were examined using transcriptome sequencing. Water stress-susceptible Cardinal had the fewest differentially expressed genes at 101, compared to Desirée at 1867, Clone 37 FB at 1179, and Mije at 1010. Water stress tolerance was associated with upregulation of the expression of transcription factor genes and genes involved in osmolyte and polyamine biosynthesis. Increased expression of genes encoding late embryogenesis abundant (LEA) and dehydrin proteins along with decreased expression of genes involved in nitrate assimilation and amino acid metabolism were found for clones showing water stress tolerance. The results also show that a water deficit was associated with reduced biotic stress responses. Additionally, heat shock protein genes were differentially expressed in all clones except for highly susceptible Cardinal. Together, the gene expression study demonstrates variation in the molecular pathways and biological processes in response to water stress contributing to tolerance and susceptibility.

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“…Under stress conditions, plants trigger various changes in biochemistry, physiology and morphology (Souza, Catuchi, Bertolli, & Soratto, 2013). One reaction of the plant to water deficit is the stomatal closure, which results in a lower rate of CO 2 assimilation (Pirasteh‐Anosheh, Saed‐Moucheshi, Pakniyat, & Pessarakli, 2016), due to the water potential reduction in the cells (Silva, Magalhães Filho, Sales, Pires, & Machado, 2018). Water deficit can modify photosynthetic pigments and gas exchange, impairing the plant growth and productive potential (Anjum et al., 2011).…”

Section: Introductionmentioning

confidence: 99%

Root growth and crop performance of soybean under chemical, physical, and biological changes after subsoiling

et al. 2020

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Chemical, physical and biological soil attributes can facilitate soybean root growth in greater volume and depth in the soil, which can minimize yield reduction caused by water deficit. Soil management can contribute positively or negatively to these soil attributes. The aim of this work was to evaluate the root growth and crop performance of soybean, in response to chemical, physical and biological changes after subsoiling at different depths. At the R5 phenological stage, trenches were made for sampling and soil collection for chemical, physical and biological analysis and root growth was carried out. At V5, V7, R2 and R5 stages, plants were collected to evaluate height, leaf area and dry mass. At V5, stage number and dry mass of the nodules were evaluated. Subsoiling increased pH and Ca, and decreased Al in the soil, resulted in higher relative density and did not affect in mechanical penetration resistance compared to non-subsoiled soil. Basal respiration and soybean nodulation were higher in the subsoiled soil. Up to 15 cm depth, there were 87.91% of the total root dry mass and 78.79% of the total root volume. Initial and final plant growth were the same in subsoiled and non-subsoiled soil. Number of nodules in the subsoiled soil was 28% higher than in the non-subsoiled soil. Under these study conditions, subsoiling provides lower root growth but benefits grain yield.

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Stomatal responses to drought stress

Cited by 172 publications

References 85 publications

Production of parsley in hydroponic conditions under isosmotic brackish nutrient solutions

Production of parsley in hydroponic conditions under isosmotic brackish nutrient solutions

Transcriptome Profiles of Contrasting Potato (Solanum tuberosum L.) Genotypes Under Water Stress

Root growth and crop performance of soybean under chemical, physical, and biological changes after subsoiling

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