Abstract
High temperatures have significant impacts on fruit tree production. Foliar spraying application of promoting agents can be a sustainable approach to managing high-temperature stress in orchards. The mechanism of certain improving agents on photosynthesis is not yet well understood, particularly in fruit trees. Photosynthesis, as a vital and very sensitive process in plants, is a pivotal component in fruit production. Therefore, in this study, we explored the potential of two different promoting agents, salicylic acid (SA) and ascorbic acid (AsA), to alleviate oxidative stress caused by high temperature in controlled conditions (37°C for 1 h) at the photosynthetic level. For studying photosynthetic responses, we used chlorophyll fluorescence measurements. According to our findings, foliar application of promoting agents effectively increased the high-temperature tolerance of apple leaves, when compared to sole heat stress treatment. Both promoting agents significantly increased photosynthetic efficiency under stress, while the maximum was observed with AsA. In general, AsA and SA applications had a positive effect on the photosynthesis of apple leaves at high temperatures.
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Claims 4
Claim · model-written summary
Salicylic acid foliar treatment increased heat tolerance of apple leaves compared with heat stress alone.
- Taxon
- apple
Malus domesticae0 - Treatment
- salicylic acide1
- Outcome
- high-temperature tolerancee0
- Direction
- increasede0
- Comparator
- sole heat stress treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of promoting agents effectively increased the high-temperature tolerance of apple leaves, when compared to sole heat stress treatment.”
e1“salicylic acid (SA)”
Claim · model-written summary
Ascorbic acid foliar treatment increased heat tolerance of apple leaves compared with heat stress alone.
- Taxon
- appleMalus domesticae0
- Treatment
- ascorbic acide1
- Outcome
- high-temperature tolerancee0
- Direction
- increasede0
- Comparator
- sole heat stress treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of promoting agents effectively increased the high-temperature tolerance of apple leaves, when compared to sole heat stress treatment.”
e1“ascorbic acid (AsA)”
Claim · model-written summary
Salicylic acid significantly increased photosynthetic efficiency under heat stress.
- Taxon
- appleMalus domesticat0
- Treatment
- salicylic acide1
- Outcome
- photosynthetic efficiencye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both promoting agents significantly increased photosynthetic efficiency under stress”
t0“apple leaves”
e1“salicylic acid (SA)”
Claim · model-written summary
Ascorbic acid significantly increased photosynthetic efficiency under heat stress and gave the maximum response.
- Taxon
- appleMalus domesticat0
- Treatment
- AsAe0
- Outcome
- photosynthetic efficiencye0
- Direction
- increasede0
- Qualifier
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both promoting agents significantly increased photosynthetic efficiency under stress, while the maximum was observed with AsA.”
t0“apple leaves”
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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.