Photosynthetic Parameters as Physiological Indicators of Tolerance to Cadmium Stress in Sunflower Genotypes

Sacramento, Bárbara Lima do; Neto, André Dias de Azevedo; Alves, Andreia Teixeira; Moura, Silvany Cardim; Ribas, Rogério Ferreira

doi:10.1590/1983-21252018v31n413rc

Cited by 7 publications

(5 citation statements)

References 21 publications

(20 reference statements)

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“…These results agree with those presented by Sacramento et al (2018), who worked with sunflower and also found that, under stress conditions, there is an increase in the parameter YNO.…”

Section: Resultssupporting

confidence: 93%

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Photochemical efficiency of basil cultivars fertigated with salinized nutrient solutions

Santos

Oliveira

et al. 2020

Rev. bras. eng. agríc. ambient.

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Reduction in plant growth under salt stress is due, among other factors, to changes in photochemical efficiency and, consequently, in photosynthesis. The objective of this study was to evaluate the effect of salt stress on the chlorophyll fluorescence variables in cultivars of basil (Ocimum basilicum L.). The experiment was conducted in a greenhouse, using a randomized block design in a 5 x 3 factorial scheme, corresponding to five basil cultivars (‘Grecco a Palla’, ‘Alfavaca Basilicão’, ‘Alfavaca Verde’, ‘Lemoncino’ and ‘Roxo’) and three salinity of the nutrient solution (2.0, 3.5 and 5.0 dS m-1), with three repetitions, and the experimental plot was represented by three pots containing 3.0 dm3 of coconut fiber. At the full flowering stage, plants were evaluated for chlorophyll fluorescence, when adapted to the dark, as well as under saturating light conditions. In general, there were changes in fluorescence variables only at salinity above 3.5 dS m-1. Fertigation using high-salinity water promotes strong changes in the chlorophyll a fluorescence of sensitive basil cultivars. The cultivars ‘Grecco a Palla’ and ‘Alfavaca Verde’ were little affected by the increase of salinity, being the most tolerant to salt stress. In the cultivars ‘Alfavaca Basilicão’, ‘Lemoncino’ and ‘Roxo’, chlorophyll fluorescence was strongly affected by salinity, being the most sensitive. The tolerance ranking based on chlorophyll fluorescence is: ‘Grecco a Palla’ = ‘Alfavaca Verde’ > ‘Alfavaca Basilicão’ > ‘Lemoncino’ > ‘Roxo’.

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“…These results agree with those presented by Sacramento et al (2018), who worked with sunflower and also found that, under stress conditions, there is an increase in the parameter YNO.…”

Section: Resultssupporting

confidence: 93%

“…YNPQ refers to the dissipation of energy in the form of heat through the regulatory photoprotective mechanism (xanthophyll cycle), which prevents damage caused by excess photons, so that a high YNPQ indicates high photoprotective capacity (Sacramento et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Photochemical efficiency of basil cultivars fertigated with salinized nutrient solutions

Santos

Oliveira

et al. 2020

Rev. bras. eng. agríc. ambient.

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“…The net photosynthetic rate ( P N , µmol(CO 2 )m −2 s −1 ), stomatal conductance ( g s , mol⋅m −2 s −1 ), transpiration rate ( Tr , mmol⋅m −2 s −1 ), and intercellular CO 2 concentration ( C i , µmol⋅mol −1 ) were measured with an LI-6400 portable gas exchange measurement system (LI-COR, Lincoln, NE, USA) equipped with a blue/red light source [ 75 , 76 ]. The measurement conditions were as follows: light intensity of 800 μmol·s −1 , CO 2 concentration of 400 μmol·mol −1 , environment temperature of 25 ± 2 °C, the leaf temperature was 30 ± 2 °C, relative humidity of air of 55 ± 5%.…”

Section: Methodsmentioning

confidence: 99%

Can Electrophysiological Parameters Substitute for Growth, and Photosynthetic Parameters to Characterize the Response of Mulberry and Paper Mulberry to Drought?

Xing

2021

Plants

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Drought is a key factor restricting plant survival, growth and development. The physiological parameters of plants are commonly used to determine the water status, in order to irrigate appropriately and save water. In this study, mulberry (Morus alba L.) and paper mulberry (Broussonetia papyrifera (L.) Vent.) seedlings were used as experimental materials, and four soil moisture treatments were set up for both plant species: 70–75% (CK: the control group, referred to as T0), 55–60% (T1: mild drought), 40–45% (T2: moderate drought), and 25–30% (T3: severe drought). The growth parameter of the plants was measured every two days from the onset of the treatment, the photosynthetic and electrophysiological parameters of the plants were measured every other week for a total of five times. The physiological responses and electrophysiological traits of leaves under different treatment levels were analyzed. The results showed that the photosynthetic and electrophysiological parameters could characterize the response of mulberry growth and development to soil water, and the growth and electrophysiological parameters could characterize the response of paper mulberry growth and development to soil water. Mild drought had no significant effects on the growth and development of mulberry and paper mulberry.

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“…The content of photosynthetic pigments and net photosynthetic rate are closely related physiological indicators commonly used to evaluate plant performance in normal and stress conditions (Sacramento et al, 2018).…”

Section: Effects Of Imazamox On Photosynthetic Performance and Produc...mentioning

confidence: 99%

Photosynthetic performance and productivity of maize (Zea mays L.), exposed to simulated drift of imazamox and subsequent therapy application with protein hydrolysates

Balabanova¹,

Neshev²,

Yanev³

et al. 2023

JCEA

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The use of herbicides is а traditional method for weed control in crop-producing systems. Along with the high effective weed control, herbicides might cause phytotoxicity for crop plants, due to insufficient herbicide selectivity, combining herbicide treatment with unsuitable meteorological conditions, long-term persistence of herbicide in the soil or off-target transfer of the herbicide -drift. Imazamox is a selective herbicide of imidazolinone group, used to control annual and perennial weeds in imidazolinone-resistant (IMI-R) crops. Protein hydrolysates (PHs) are a group of plant biostimulants containing small peptides and free amino acids, reported to ameliorate plant abiotic stress tolerance, including herbicide phytotoxicity. This report evaluates the damaging effect of simulated imazamox drift on growth, photosynthetic performance and productivity of maize plants as well as the efficiency of foliar application by protein hydrolysates as therapy means. The received results demonstrated that the simulated imazamox herbicide drift has a strong inhibiting effect on maize plants. This is well illustrated by the retarded growth of maize plants, their disrupted photosynthetic activity and productivity losses. The foliar supply of PHs to imazamox damaged maize plants ameliorates their photosynthetic performance, growth and crop productivity.

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Photosynthetic Parameters as Physiological Indicators of Tolerance to Cadmium Stress in Sunflower Genotypes

Cited by 7 publications

References 21 publications

Photochemical efficiency of basil cultivars fertigated with salinized nutrient solutions

Photochemical efficiency of basil cultivars fertigated with salinized nutrient solutions

Can Electrophysiological Parameters Substitute for Growth, and Photosynthetic Parameters to Characterize the Response of Mulberry and Paper Mulberry to Drought?

Photosynthetic performance and productivity of maize (Zea mays L.), exposed to simulated drift of imazamox and subsequent therapy application with protein hydrolysates

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