Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water

Monteiro, Danilo Rodrigues; Melo, Hidelblandi F. de; Lins, Cíntia Maria Teixeira; Dourado, Pablo Rugero Magalhães; Santos, Hugo Rafael Bentzen; Souza, Eliane Helena Alvim de

doi:10.1590/1807-1929/agriambi.v22n10p673-678

Cited by 10 publications

(8 citation statements)

References 18 publications

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“…The photosystem II photochemical efficiency reduced 1.66% by a unit increase in water salinity, which corresponds to a decrease of 10.09% between irrigated plants with higher and lower electrical conductivity (Figure 3A). This reduction in the photosystem II photochemical efficiency is due to the damage to the photosynthetic apparatus caused by salinity, limiting the electron transport rate in chloroplasts, with a consequent reduction in the photosystem II photochemical efficiency (Monteiro et al, 2018;Alves et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Growth and physiology of ornamental sunflower under salinity in function of paclobutrazol application methods

Guimarães

Júnior

Lima

et al. 2021

Rev. bras. eng. agríc. ambient.

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The ornamental sunflower has great importance in the floriculture sector due to the color and vitality of its flowers. However, the production and quality of flowers decrease under salt stress, which can be mitigated with paclobutrazol application. The objective of the present study was to evaluate the effects of different application methods of paclobutrazol in ornamental sunflower ‘Sol Noturno’ irrigated with brackish waters. The experimental design was randomized blocks arranged in a 5 × 3 factorial scheme, corresponding to five electrical conductivities of irrigation water - ECw (0.4; 1.9; 3.4; 4.9, and 6.4 dS m-1) and three paclobutrazol application methods (foliar application, via soil and a control treatment - without paclobutrazol), with four replicates. The increase in salinity of irrigation water reduced gas exchange, photosystem II photochemical efficiency, SPAD index, plant height, and chapter diameter. The paclobutrazol application via soil or foliar increased stomatal conductance and transpiration by 21.09 and 17.80%, respectively, in comparison to plants without application, whereas photosynthesis and instantaneous carboxylation efficiency increased by 28.33 and 31.18% via soil and 14.40 and 16.12% via foliar, respectively. The paclobutrazol application, mainly via soil, favored ‘Sol Noturno’ sunflower plants under salt stress, increasing chlorophyll SPAD index and external chapter diameter, and keeping the number of the petals.

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Section: Resultsmentioning

confidence: 99%

Growth and physiology of ornamental sunflower under salinity in function of paclobutrazol application methods

Guimarães

Júnior

Lima

et al. 2021

Rev. bras. eng. agríc. ambient.

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“…An increase in chlorophyll content is desirable because it is responsible for capturing light photons and transmitting energy to reaction centers (Monteiro et al, 2018), and carotenoids are responsible for chlorophyll photoprotection and reduction of membrane harm (Taiz et al, 2017), maximizing the photosynthetic capacity. Under full sun cultivation, phosphate fertilization can be a potential mitigation strategy for ecophysiological disorders from light stress in the synthesis of chlorophylls.…”

Section: Discussionmentioning

confidence: 99%

Impact of phosphorus and luminosity on the propagation, photochemical reactions and quality of Lippia alba (Mill.) N.E.Br. seedlings

Santos

Franco-Rodrigues

Araujo

et al. 2019

Rev. Colomb. Cienc. Hortic.

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Lippia alba (Mill.) N.E.Br. (lemongrass) is a spice and medicinal plant species, with fledgling studies related to mineral nutrition and luminosity on foliar and vegetative responses. Thus, the aim of this study was to assess the foliar aspects and production of L. alba under two light conditions (full sun and 50% shading ) and four levels of phosphorus-P (0, 150, 300 and 450 mg kg-1). The L. alba seedlings presented changes in physiological indices and photochemical responses based on chlorophyll-a fluorescence. The phosphate fertilization helped mitigate the light stress for the synthesis of chlorophylls. The greatest leaf biomass production occurred with addition of P. The principal components analysis explained 74% of the variability, with leaf number, initial fluorescence and specific leaf area in principal component 1 (PC 1) and bud number, survival and leaf area in PC 2. Two groups formed in the cluster analysis, with lower distances between P300 full sun and P450 shading (2.31). The seedlings cultivated under full sun presented a higher survivability and seedling quality. The production of L. alba seedlings should be done under full sun with the addition of 450 mg kg-1 of phosphorus.

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“…Negative correlation with carotenoids shows that if there is increase in carotenoids content which is obvious during salt stress then amount of chlorophyll start decreasing in plant seedling. Higher level of salinity caused degradation of chlorophyll b content in young seedling (Monteiro et al, 2018). Table 3.4 shows that plant height has positive, higher and significant correlation with chlorophyll a, b, stem weight, leaf diameter and leaf length.…”

Section: Correlation Analysismentioning

confidence: 98%

Evaluation of Genetic Variability for Salt Tolerance in Wheat

Iqra

Rashid

Ali

et al. 2020

Biol Clin Sci Res J

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Wheat is an important cereal crop which has been consumed as food crop throughout the globe. Present study discusses change in different morphological traits of six most common wheat varieties in Pakistan under the effect of salt stress. We have used two salt solutions; 10 dS/m NaCl and 15 dS/m NaCl concentrations were used in our research. Data collected during research indicates that all morphological traits decrease under salt treatments except that of two trait viz., root length and carotenoids level. It was noted that under the effect of both salt concentrations carotenoids content increased in significant amount in leaves and roots along with root length which was also increased. The outcomes from analysis of variance demonstrated that there was higher leaf caroteniods for genotype 5 (Ujala-16) that was 998.32 mg/g of fresh leaf weight trailed by genotype 1 (Inqalab-91) 995.99 mg/g of fresh leaf weight) while lower carotenoids were found for genotype 2(Shafaq-06) that was 825.65 mg/g of fresh leaf weight. Highest root weight was found in Shafaq-06 under treatment of 15dS/m NaCl. While pooled all Pairwise comparison test revealed highest root length in genotype 4 (Galaxy-13). While linear regression suggests that carotenoids content contribute least in plant height. Genetic heritability was found highest for photosynthetic pigments i.e. 99.99% for chlorophyll b except that of carotenoids. Genetic advance was recorded higher for fresh stem weight (309.870%). Higher heritability and genetic advance revealed that from our study that the selection of salt stress wheat genotypes on the basis of root length may be help to develop salt stress tolerance wheat genotypes with higher grain yield.

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Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water

Cited by 10 publications

References 18 publications

Growth and physiology of ornamental sunflower under salinity in function of paclobutrazol application methods

Growth and physiology of ornamental sunflower under salinity in function of paclobutrazol application methods

Impact of phosphorus and luminosity on the propagation, photochemical reactions and quality of Lippia alba (Mill.) N.E.Br. seedlings

Evaluation of Genetic Variability for Salt Tolerance in Wheat

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