Changes in Chlorophyll Content and Fluorescence and Total Soluble Sugars Rapeseed Cultivars under Osmotic Stress

In order to evaluate the effect of osmotic stress on total soluble sugars, chlorophyll fluorescence and chlorophyll content (SPAD) in the seedling stage of rapeseed, an experiment was conducted as split plot based on randomized complete block design with four replications. The levels of osmotic stre...

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Main Authors: M Nemati, A Asghari
Format: Article
Language:fas
Published: University of Tabriz 2015-01-01
Series:Journal of Agricultural Science and Sustainable Production
Subjects:
Online Access:http://sustainagriculture.tabrizu.ac.ir/article_1285_a6f5e826bf170f33ccf8fdc9f2b18d98.pdf
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spelling doaj-2cfe5e68c6cc46d7b556cfe5ecbf4df92020-11-24T22:16:57ZfasUniversity of TabrizJournal of Agricultural Science and Sustainable Production2476-43102476-43292015-01-01224.11671811285Changes in Chlorophyll Content and Fluorescence and Total Soluble Sugars Rapeseed Cultivars under Osmotic StressM Nemati0A Asghari1دانشگاه محقق اردبیلیدانشگاه محقق اردبیلیIn order to evaluate the effect of osmotic stress on total soluble sugars, chlorophyll fluorescence and chlorophyll content (SPAD) in the seedling stage of rapeseed, an experiment was conducted as split plot based on randomized complete block design with four replications. The levels of osmotic stress (control, -3.5 and -7 bar) as main factor and 12 rapeseed cultivars as sub factor were used. Results showed that osmotic stress decreased total soluble sugars, Fo, Fv and Fm, but increased SPAD and Fv/Fm. It seemed that increasing of Chlorophyll content caused decreasing of light repression and increasing of Fv/Fm. The Fv/Fm can be used as a physiological index for selection osmotic stress tolerant cultivars. In osmotic stress condition (-7 bar) The Licord, Zarfam and Orient cultivars had the highest Fv/Fm. Also, the Licord cultivar had high biological yield in stress and non stress condition. The amount of stress Tolerant Index (STI) in this cultivar was higher than others. In factor analysis, the four first factors explained 92.04 present of trait variance. The first factor had positive and high coefficients for biological yield and STI and the second factor had positive and high coefficients for chlorophyll fluorescence. Grouping of cultivars using tow first factor showed that Licord cultivar was osmotic stress tolerant and separated from other cultivars.http://sustainagriculture.tabrizu.ac.ir/article_1285_a6f5e826bf170f33ccf8fdc9f2b18d98.pdfOsmotic stressStress tolerance indicesChlorophyll fluorescenceTotal soluble sugarsRapeseed
collection DOAJ
language fas
format Article
sources DOAJ
author M Nemati
A Asghari
spellingShingle M Nemati
A Asghari
Changes in Chlorophyll Content and Fluorescence and Total Soluble Sugars Rapeseed Cultivars under Osmotic Stress
Journal of Agricultural Science and Sustainable Production
Osmotic stress
Stress tolerance indices
Chlorophyll fluorescence
Total soluble sugars
Rapeseed
author_facet M Nemati
A Asghari
author_sort M Nemati
title Changes in Chlorophyll Content and Fluorescence and Total Soluble Sugars Rapeseed Cultivars under Osmotic Stress
title_short Changes in Chlorophyll Content and Fluorescence and Total Soluble Sugars Rapeseed Cultivars under Osmotic Stress
title_full Changes in Chlorophyll Content and Fluorescence and Total Soluble Sugars Rapeseed Cultivars under Osmotic Stress
title_fullStr Changes in Chlorophyll Content and Fluorescence and Total Soluble Sugars Rapeseed Cultivars under Osmotic Stress
title_full_unstemmed Changes in Chlorophyll Content and Fluorescence and Total Soluble Sugars Rapeseed Cultivars under Osmotic Stress
title_sort changes in chlorophyll content and fluorescence and total soluble sugars rapeseed cultivars under osmotic stress
publisher University of Tabriz
series Journal of Agricultural Science and Sustainable Production
issn 2476-4310
2476-4329
publishDate 2015-01-01
description In order to evaluate the effect of osmotic stress on total soluble sugars, chlorophyll fluorescence and chlorophyll content (SPAD) in the seedling stage of rapeseed, an experiment was conducted as split plot based on randomized complete block design with four replications. The levels of osmotic stress (control, -3.5 and -7 bar) as main factor and 12 rapeseed cultivars as sub factor were used. Results showed that osmotic stress decreased total soluble sugars, Fo, Fv and Fm, but increased SPAD and Fv/Fm. It seemed that increasing of Chlorophyll content caused decreasing of light repression and increasing of Fv/Fm. The Fv/Fm can be used as a physiological index for selection osmotic stress tolerant cultivars. In osmotic stress condition (-7 bar) The Licord, Zarfam and Orient cultivars had the highest Fv/Fm. Also, the Licord cultivar had high biological yield in stress and non stress condition. The amount of stress Tolerant Index (STI) in this cultivar was higher than others. In factor analysis, the four first factors explained 92.04 present of trait variance. The first factor had positive and high coefficients for biological yield and STI and the second factor had positive and high coefficients for chlorophyll fluorescence. Grouping of cultivars using tow first factor showed that Licord cultivar was osmotic stress tolerant and separated from other cultivars.
topic Osmotic stress
Stress tolerance indices
Chlorophyll fluorescence
Total soluble sugars
Rapeseed
url http://sustainagriculture.tabrizu.ac.ir/article_1285_a6f5e826bf170f33ccf8fdc9f2b18d98.pdf
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