Abstract
In this study, the effect of heat shock pretreatment on the occurence of cross tolerance to heat, salinity, drought, and UV-B stress in three barley (Hordeum vulgare L.) cultivars (Bülbül-89, Tarm-92, and Tokak 157/37) was investigated through the chlorophyll a fluorescence technique. Heat stress increased Fo (minimum fluorescence) significantly when compared to the controls of these barley cultivars, but heat shock pretreatment led to lower Fo values in all cultivars. Fm (maximum fluorescence), Fv/Fm (maximum quantum efficiency of photosystem II) and PI (performance index) were significantly decreased in all barley cultivars subjected to heat stress. In Tarm-92, heat shock pretreatment caused higher Fm, Fv/Fm and PI values than heat stress alone. On the other hand, heat shock pretreatment decreased Fm, Fv/Fm and PI more drastically in Bülbül-89 and Tokak 157/37. As a consequence, changes in Fo, Fm, Fv/Fm and PI may be attributed to thermotolerance development in Tarm-92 as a result of heat shock pretreatment.
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Claims 6
Claim · model-written summary
Heat stress significantly increased Fo relative to controls in all three barley cultivars.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree1 - Treatment
- Heat stresse0
- Outcome
- Fo (minimum fluorescence)e0
- Direction
- increasede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Heat stress increased Fo (minimum fluorescence) significantly when compared to the controls of these barley cultivars”
e1“three barley (Hordeum vulgare L.) cultivars”
Claim · model-written summary
Heat shock pretreatment lowered Fo in all barley cultivars under heat stress.
- Taxon
- barleyHordeum vulgaree1
- Treatment
- heat shock pretreatmente0
- Outcome
- Fo valuese0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat shock pretreatment led to lower Fo values in all cultivars”
e1“three barley (Hordeum vulgare L.) cultivars”
Claim · model-written summary
Heat stress significantly decreased Fm, Fv/Fm and PI in all barley cultivars.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- heat stresse0
- Outcome
- Fm (maximum fluorescence), Fv/Fm (maximum quantum efficiency of photosystem II) and PI (performance index)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fm (maximum fluorescence), Fv/Fm (maximum quantum efficiency of photosystem II) and PI (performance index) were significantly decreased in all barley cultivars subjected to heat stress”
Claim · model-written summary
In Tarm-92, heat shock pretreatment yielded higher Fm, Fv/Fm and PI than heat stress alone.
- Taxon
- barleyHordeum vulgaree1
- Material
- Tarm-92e0
- Treatment
- heat shock pretreatmente0
- Outcome
- Fm, Fv/Fm and PI valuese0
- Direction
- highere0
- Comparator
- heat stress alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Tarm-92, heat shock pretreatment caused higher Fm, Fv/Fm and PI values than heat stress alone”
e1“three barley (Hordeum vulgare L.) cultivars”
Claim · model-written summary
In Bülbül-89, heat shock pretreatment decreased Fm, Fv/Fm and PI more drastically.
- Taxon
- barleyHordeum vulgaree1
- Material
- Bülbül-89e0
- Treatment
- heat shock pretreatmente0
- Outcome
- Fm, Fv/Fm and PIe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat shock pretreatment decreased Fm, Fv/Fm and PI more drastically in Bülbül-89 and Tokak 157/37”
e1“three barley (Hordeum vulgare L.) cultivars”
Claim · model-written summary
In Tokak 157/37, heat shock pretreatment decreased Fm, Fv/Fm and PI more drastically.
- Taxon
- barleyHordeum vulgaree1
- Material
- Tokak 157/37e0
- Treatment
- heat shock pretreatmente0
- Outcome
- Fm, Fv/Fm and PIe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat shock pretreatment decreased Fm, Fv/Fm and PI more drastically in Bülbül-89 and Tokak 157/37”
e1“three barley (Hordeum vulgare L.) cultivars”
The same questions in other papers
heat · physiology: photosynthesis · Hordeum vulgare (barley)Positive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
3 papers more in this group
See all 7 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.