Abstract
As a continental country, Brazil has very diverse climate and growing conditions, which can be adverse to citrus growing in certain regions hindering regular fruit production. To know more about the effects of water stress on gas exchanges and phenological characteristics of orange tree cultivar 'Cabula', an experiment was conducted in a greenhouse where these parameters were analyzed by managing applied water. Three treatments were applied, and irrigation was based on suppling water to maintain 100, 50 and 25% of the soil water storage capacity. All technical features were assessed within 210 days, and a completely randomized design was used. The results were analyzed by means of variance analysis and compared by Tukey test at 5% probability. Starting at 100 days of drought, it was found that many of the gas exchange parameters were affected, observing reductions in photosynthesis (A) and transpiration (E), which followed the decrease in stomatal conductance (gs). Reductions were also observed in tree height and stem diameter of plants under stress. The production of flowers and fruits was also significantly (P<0.05) affected by the reduction in water availability. In general, it was observed that photosynthetic rate, growth parameters and producing flowers and fruits were higher in treatment “without stress”, suggesting that these require irrigation under farming field conditions above 50% of field capacity to keep production at satisfactory levels.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Drought reduced photosynthesis after 100 days.
Not reportedComparator
Verbatim
t0“orange”
e0“Starting at 100 days of drought, it was found that many of the gas exchange parameters were affected, observing reductions in photosynthesis (A)”
Claim · model-written summary
Drought reduced transpiration after 100 days.
Not reportedComparator
Verbatim
t0“orange”
e0“Starting at 100 days of drought, it was found that many of the gas exchange parameters were affected, observing reductions in photosynthesis (A) and transpiration (E)”
Claim · model-written summary
Stomatal conductance decreased with drought effects on gas exchange.
Not reportedComparator
Verbatim
t0“orange”
e0“Starting at 100 days of drought, it was found that many of the gas exchange parameters were affected, observing reductions in photosynthesis (A) and transpiration (E), which followed the decrease in stomatal conductance (gs)”
Claim · model-written summary
Stress reduced tree height.
Not reportedComparator
Verbatim
e0“orange tree cultivar”
e1“Reductions were also observed in tree height and stem diameter of plants under stress”
Claim · model-written summary
Stress reduced stem diameter.
Not reportedComparator
Verbatim
e0“orange tree cultivar”
e1“Reductions were also observed in tree height and stem diameter of plants under stress”
Claim · model-written summary
Reduced water availability significantly affected flower production.
Not reportedComparatorDirection
Verbatim
t0“orange”
e0“The production of flowers and fruits was also significantly (P<0.05) affected by the reduction in water availability”
Claim · model-written summary
Reduced water availability significantly affected fruit production.
Not reportedComparatorDirection
Verbatim
t0“orange”
e0“The production of flowers and fruits was also significantly (P<0.05) affected by the reduction in water availability”
Claim · model-written summary
Photosynthetic rate was higher without stress.
Not reportedComparator
Verbatim
t0“orange”
e0“photosynthetic rate, growth parameters and producing flowers and fruits were higher in treatment “without stress””
Claim · model-written summary
Growth parameters were higher without stress.
Not reportedComparator
Verbatim
t0“orange”
e0“photosynthetic rate, growth parameters and producing flowers and fruits were higher in treatment “without stress””
Claim · model-written summary
Flower production was higher without stress.
Not reportedComparator
Verbatim
t0“orange”
e0“photosynthetic rate, growth parameters and producing flowers and fruits were higher in treatment “without stress””
Claim · model-written summary
Fruit production was higher without stress.
Not reportedComparator
Verbatim
t0“orange”
e0“photosynthetic rate, growth parameters and producing flowers and fruits were higher in treatment “without stress””
Claim · model-written summary
The authors suggest irrigation above 50% of field capacity to maintain satisfactory production.
Verbatim
t0“orange”
e0“suggesting that these require irrigation under farming field conditions above 50% of field capacity to keep production at satisfactory levels”
The same questions in other papers
soil water · yield · Citrus sinensis (sweet orange)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
drought · physiology: gas exchange · Citrus sinensis (sweet orange)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 papers →drought · physiology: photosynthesis · Citrus sinensis (sweet orange)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 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.