2018
DOI: 10.1590/1983-21252018v31n413rc
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Photosynthetic Parameters as Physiological Indicators of Tolerance to Cadmium Stress in Sunflower Genotypes

Abstract: The objective of the present study was to evaluate the tolerance to cadmium (Cd) of sunflower genotypes grown in greenhouse conditions, and the effectiveness of using photosynthetic parameters as physiological indicators of this tolerance. Seeds of two sunflower genotypes previously identified as tolerant (H358) and Cd-sensitive (AG960) to Cd were used. The seeds were germinated in plastic cups containing plant substrate; after 9 days, the seedlings were transplanted to plastic basins containing a nutrient sol… Show more

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Cited by 4 publications
(3 citation statements)
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References 21 publications
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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%
See 1 more Smart Citation
“…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%
“…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%