Estimating growth and photosynthetic properties of wheat grown in simulated saline field conditions using hyperspectral reflectance sensing and multivariate analysis

El-Hendawy, Salah; Al-Suhaibani, Nasser; Alotaibi, Majed A.; Hassan, Wael M.; Elsayed, Salah; Tahir, Muhammad Usman; Mohamed, Ahmed Ibrahim; Schmidhalter, Urs

doi:10.1038/s41598-019-52802-5

Cited by 18 publications

(22 citation statements)

References 60 publications

(96 reference statements)

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“…In this regard, Ma et al [28] reported that saline conditions caused pigment degradation and leaf burning in salt-sensitive species. A suppressed effect of salinity on photosynthetic pigments has been reported in many investigations [3,5,7].…”

Section: Discussionmentioning

confidence: 83%

“…e notable decreases were observed with Sakha8, which was the most influenced cultivar by saline conditions, followed by Giza168 and Sakha69 which was the most resistant cultivar to the NaCl salt application. e response of plant growth to salinity stress varies among species and has been reported in many investigations [1,2,5,21,22]. In this consideration, Bacu et al [7] demonstrated that an increase in salt concentration (50, 100, and 200 mM NaCl) induced a significant decrease in the growth criteria (shoot, root, and leaf length) of five wheat cultivars.…”

Section: Discussionmentioning

confidence: 91%

“…ere are various morphophysiological criteria such as growth parameters, plant-water relations, photosynthetic gas exchange properties, and pigment contents that are useful to detect the plant's physiological status under saline conditions. ese criteria provide valuable information that can be used in evaluating the salt tolerance of genotypes in a breeding program, understanding the salt tolerance mechanisms, and supporting the crops and production under salt stress conditions by applying appreciating agronomic practices [5]. In addition, salt stress restricts the photosynthesis process by influencing the organelles' ultrastructure and concentration of metabolites and various pigments by suppressing several metabolic and physiological processes [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Growth, Water Relations, and Photosynthetic Activity Are Associated with Evaluating Salinity Stress Tolerance of Wheat Cultivars

Elhakem

2020

International Journal of Agronomy

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Salinity stress riskiness adversely affects the population by causing food and environmental issues. Moreover, the destructive impacts of salinization differ among various plant cultivars. In the present study, we evaluate the salt stress tolerance among three wheat cultivars based on growth criteria, leaf relative water content (LRWC), and abscisic acid (ABA) level by treating the plants with 0, 40, 80, or 160 mM NaCl. The results revealed that an increase in NaCl concentration caused a massive reduction in growth (shoot and root growth criteria and flag leaf area), photosynthetic pigments (chlorophyll a, chlorophyll b, carotenoids, and total pigments), and LRWC value, but a significant increase in the ABA content in flag leaf in all wheat cultivars. The wheat cultivars were otherwise exposed to anatomical characteristics and photosynthetic gas exchange investigations. NaCl toxicity induced a noticeable reduction in stomatal aperture area (SAA), stomatal conductance (Gs), transpiration rate (Tr), and leaf net photosynthetic rate (Pn). These impacts were remarkable with the 160 mM NaCl treatments for all evaluated parameters. Moreover, Sakha 69 revealed salinity tolerance greater than Giza168, and Sakha8 was the most salt-sensitive cultivar. Consequently, we recognized Sakha 69 as a salt-tolerant cultivar that may be used as parents in breeding programs for new cultivars with enhanced salt tolerance and for further genetic investigations to reveal the genetic strategies controlling the response of salinity stress in the wheat plant.

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Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Growth, Water Relations, and Photosynthetic Activity Are Associated with Evaluating Salinity Stress Tolerance of Wheat Cultivars

Elhakem

2020

International Journal of Agronomy

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“…Furthermore, Sakha93 and Misr2 are more recent releases and are also known to be salinity stress-tolerant cultivars [37,38]. In contrast, Sakha61, Sakha94, Gemmiza9 cultivars were previously found to be sensitive to salinity stress [37,39,40]. Furthermore, Giza164 and Gemmiza10, Sides1, and Giza168 were found to be sensitive to moderately tolerant cultivars to salinity stress [8,37,38].…”

Section: Introductionmentioning

confidence: 99%

“…For example, bread wheat tolerance to salinity is characterized by higher K + to Na + uptake [18]. Maintaining a high K/Na ratio is critical in preserving cell volume regulation under salt stress, which is found to increase salt tolerance in wheat [39]. In bread wheat, a locus (Kna1) on the 4D chromosome was found to be associated with Na + accumulation and the K/Na ratio [70].…”

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confidence: 99%

Saline Water Threshold Level that Maximizes Grain Yield Production and Minimizes Sodium Accumulation for Salinity Stress-sensitive and Tolerant Wheat Cultivars

Morsy

Elbasyoni

Baenziger

2021

AJRCS

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Saline irrigation is one of the approaches that was developed to address the freshwater gap in many regions around the world. This experiment was conducted in two growing seasons under open field conditions in pots. In addition to the control (0.5 dSm-1), three levels of saline water, i.e., 5.0, 7.0, and 9 dSm-1 were used to irrigate ten commercially grown Egyptian wheat cultivars. The number of days to flowering, plant height, fertile tillers, grain weight per spike, number of kernels per spike, and grain yield were measured. Furthermore, Na+, K+, Ca+2, Mg+2, and Cl− were also measured. The objectives of the current study were to (a) estimate the quantitative impact of various levels of saline irrigation water on physio-agronomical performance of commercially grown wheat cultivars; (b) highlight the importance of using salinity stress tolerant wheat cultivars in a scenario where they grow beside salinity stress-sensitive ones and are irrigated with multiple levels of saline water. Salinity stress tolerant wheat cultivars tend to maintain higher levels of K+, Ca+2, and Mg+2, compared to the sensitive ones. Overall, the average performance of the salinity stress-tolerant cultivars across the levels of saline water used was 26.5% higher than the sensitive ones for grain yield. Our results also indicated that 6.25 dSm-1 is the maximum saline water that can be used to irrigate the sensitive wheat cultivars. In which 6.25 dSm-1 is the salinity level that maximizes grain yield, the number of fertile tillers, and K+ concentration while minimizing Na+ accumulation in plants. For the same reasons, nine dSm-1 was defined as the salinity threshold for the salinity stress-tolerant cultivars.

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Hyperspectral monitor on chlorophyll density in winter wheat under water stress

et al. 2020

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Lack of water can lead lower chlorophyll concentrations and yields. Based on the hyperspectral reflectance of winter wheat (Triticum aestivum L.), we analyzed the relationship between the canopy hyperspectral reflectance and the waterstressed winter wheat. The correlation analysis (CA), partial least squares regression (PLSR), and successive progressions algorithm (SPA) were used to extract the important bands. Then the hyperspectral estimation models for chlorophyll density (ChD) by characteristic variables were established. The results showed that the reflectance in the visible regions increased gradually with an increasing water stress. In the near-infrared (NIR) region, reflectance decreased with stress intensity. We extracted five and seven important waveband regions by CA and PLSR. Then we extracted right and nine important bands through SMLR, and 11 important bands were extracted by the method of SPA. We found that 427, 434, 749, and 814 nm contained important information about ChD of winter wheat after water stress. The model established by CA+SMLR was generally realized, whereas the ChD estimation models established by PLSR+SMLR and SPA with multiple linear regression had better performance, and the performance of the validation model was accurate and robust. The results of this study could provide theoretical basis and practical reference for accurate estimation of ChD in winter wheat after water stress.

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Estimating growth and photosynthetic properties of wheat grown in simulated saline field conditions using hyperspectral reflectance sensing and multivariate analysis

Cited by 18 publications

References 60 publications

Growth, Water Relations, and Photosynthetic Activity Are Associated with Evaluating Salinity Stress Tolerance of Wheat Cultivars

Growth, Water Relations, and Photosynthetic Activity Are Associated with Evaluating Salinity Stress Tolerance of Wheat Cultivars

Saline Water Threshold Level that Maximizes Grain Yield Production and Minimizes Sodium Accumulation for Salinity Stress-sensitive and Tolerant Wheat Cultivars

Hyperspectral monitor on chlorophyll density in winter wheat under water stress

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