Abstract
In this study the sensitivity of peach tree (Prunus persica L.) to three water stress levels from mid-pit hardening until harvest was assessed. Seasonal patterns of shoot and fruit growth, gas exchange (leaf photosynthesis, stomatal conductance and transpiration) as well as carbon (C) storage/mobilization were evaluated in relation to plant water status. A simple C balance model was also developed to investigate sink-source relationship in relation to plant water status at the tree level. The C source was estimated through the leaf area dynamics and leaf photosynthesis rate along the season. The C sink was estimated for maintenance respiration and growth of shoots and fruits. Water stress significantly reduced gas exchange, and fruit, and shoot growth, but increased fruit dry matter concentration. Growth was more affected by water deficit than photosynthesis, and shoot growth was more sensitive to water deficit than fruit growth. Reduction of shoot growth was associated with a decrease of shoot elongation, emergence, and high shoot mortality. Water scarcity affected tree C assimilation due to two interacting factors: (i) reduction in leaf photosynthesis (-23% and -50% under moderate (MS) and severe (SS) water stress compared to low (LS) stress during growth season) and (ii) reduction in total leaf area (-57% and -79% under MS and SS compared to LS at harvest). Our field data analysis suggested a Ψstem threshold of -1.5 MPa below which daily net C gain became negative, i.e. C assimilation became lower than C needed for respiration and growth. Negative C balance under MS and SS associated with decline of trunk carbohydrate reserves--may have led to drought-induced vegetative mortality.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 11
Claim · model-written summary
Water stress reduced gas exchange and fruit and shoot growth in peach.
- Taxon
- peach tree
Prunus persicae1 - Treatment
- Water stresse0
- Outcome
- gas exchange, and fruit, and shoot growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress significantly reduced gas exchange, and fruit, and shoot growth, but increased fruit dry matter concentration.”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Water stress increased peach fruit dry matter concentration.
- Taxon
- peach treePrunus persicae1
- Treatment
- Water stresse0
- Outcome
- fruit dry matter concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress significantly reduced gas exchange, and fruit, and shoot growth, but increased fruit dry matter concentration.”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Growth was more affected by water deficit than photosynthesis.
- Taxon
- peach treePrunus persicae1
- Outcome
- Growthe0
- Direction
- more affectede0
- Comparator
- photosynthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth was more affected by water deficit than photosynthesis, and shoot growth was more sensitive to water deficit than fruit growth.”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Shoot growth was more sensitive to water deficit than fruit growth.
- Taxon
- peach treePrunus persicae1
- Outcome
- shoot growthe0
- Direction
- more sensitivee0
- Comparator
- fruit growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth was more affected by water deficit than photosynthesis, and shoot growth was more sensitive to water deficit than fruit growth.”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Reduced shoot growth was associated with lower shoot elongation and emergence and high mortality.
- Taxon
- peach treePrunus persicae1
- Organ / stage
- shoote0
- Outcome
- shoot elongation, emergence, and high shoot mortalitye0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction of shoot growth was associated with a decrease of shoot elongation, emergence, and high shoot mortality.”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Moderate water stress reduced leaf photosynthesis by 23% relative to low stress.
- Taxon
- peach treePrunus persicae1
- Treatment
- moderate (MS)e0
- Outcome
- leaf photosynthesise0
- Direction
- reductione0
- Value
- -23%e0
- Comparator
- low (LS) stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduction in leaf photosynthesis (-23% and -50% under moderate (MS) and severe (SS) water stress compared to low (LS) stress during growth season)”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Severe water stress reduced leaf photosynthesis by 50% relative to low stress.
- Taxon
- peach treePrunus persicae1
- Treatment
- severe (SS) water stresse0
- Outcome
- leaf photosynthesise0
- Direction
- reductione0
- Value
- -50%e0
- Comparator
- low (LS) stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduction in leaf photosynthesis (-23% and -50% under moderate (MS) and severe (SS) water stress compared to low (LS) stress during growth season)”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Moderate water stress reduced total leaf area by 57% at harvest.
- Taxon
- peach treePrunus persicae1
- Treatment
- MSe0
- Outcome
- total leaf areae0
- Direction
- reductione0
- Value
- -57%e0
- Comparator
- LSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduction in total leaf area (-57% and -79% under MS and SS compared to LS at harvest)”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Severe water stress reduced total leaf area by 79% at harvest.
- Taxon
- peach treePrunus persicae1
- Treatment
- SSe0
- Outcome
- total leaf areae0
- Direction
- reductione0
- Value
- -79%e0
- Comparator
- LSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduction in total leaf area (-57% and -79% under MS and SS compared to LS at harvest)”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Daily net carbon gain became negative below a stem water potential threshold of -1.5 MPa.
- Taxon
- peach treePrunus persicae1
- Outcome
- daily net C gaine0
- Direction
- negativee0
- Value
- -1.5 MPae0
- Setting
- fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our field data analysis suggested a Ψstem threshold of -1.5 MPa below which daily net C gain became negative”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
Claim · model-written summary
Negative carbon balance under moderate and severe stress, associated with declining trunk carbohydrate reserves, may have led to vegetative mortality.
- Taxon
- peach treePrunus persicae1
- Outcome
- drought-induced vegetative mortalitye0
- Qualifier
- Negative C balance under MS and SS associated with decline of trunk carbohydrate reservese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Negative C balance under MS and SS associated with decline of trunk carbohydrate reserves--may have led to drought-induced vegetative mortality.”
t0“Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions”
e1“peach tree (Prunus persica L.)”
The same questions in other papers
drought · physiology: photosynthesis · Prunus persica (peach)Results differ
9 papers in the same direction as this paper
- negative
- negative
- negative
6 papers more in this group
See all 10 papers →drought · growth · Prunus persica (peach)Results differ
3 papers in the same direction as this paper · 10 in the opposite direction
- positive
- negative
- negative
10 papers more in this group
See all 14 papers →drought · physiology: gas exchange · Prunus persica (peach)Results agree
6 papers in the same direction as this paper
- 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.