Abstract
This study evaluates physiological aspects of two peanut cultivars (Arachis hypogaea L. IAPAR 25 Tição and IAC Tatu ST) grown under water regimes in order to verify drought tolerance. The randomized block experimental design was used in a 2 x 3 factorial design (two cultivars and three water regimes). The water regimes were, namely: control, in which plants were maintained at field capacity conditions (FC - without water deficit); moderate water deficit (MD - 50% of water deficit); and severe water deficit (SD - 75% of water deficit) in relation to control. Relative water content, gas exchange, dry matter, and leaf proline content were analyzed. Both cultivars developed physiological mechanisms of acclimatization to water deficit, such as reducing leaf relative water content, CO2 assimilation rate, stomatal conductance, and transpiration in the initial period of water deficit, besides increasing proline production. Such physiological changes negatively affected dry matter accumulation in the grains and the number of grains, as well as dry matter accumulation in shoots and roots.
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Claims 4
Claim · model-written summary
Both peanut cultivars reduced leaf relative water content, CO2 assimilation, stomatal conductance and transpiration early under water deficit.
- Taxon
- peanuts
Arachis hypogaeat0 - Treatment
- water deficite0
- Outcome
- leaf relative water content, CO2 assimilation rate, stomatal conductance, and transpiratione0
- Direction
- reducinge0
- Qualifier
- initial period of water deficite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both cultivars developed physiological mechanisms of acclimatization to water deficit, such as reducing leaf relative water content, CO2 assimilation rate, stomatal conductance, and transpiration in the initial period of water deficit”
t0“peanuts”
Claim · model-written summary
Both cultivars increased proline production under water deficit.
- Taxon
- peanutsArachis hypogaeat0
- Treatment
- water deficite1
- Outcome
- proline productione0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“besides increasing proline production”
e1“Both cultivars developed physiological mechanisms of acclimatization to water deficit”
t0“peanuts”
Claim · model-written summary
These changes negatively affected grain dry matter accumulation and grain number.
- Taxon
- peanutsArachis hypogaeat0
- Outcome
- dry matter accumulation in the grains and the number of grainse0
- Direction
- negatively affectede0
- Qualifier
- Such physiological changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Such physiological changes negatively affected dry matter accumulation in the grains and the number of grains”
t0“peanuts”
Claim · model-written summary
These changes negatively affected dry matter accumulation in shoots and roots.
- Taxon
- peanutsArachis hypogaeat0
- Outcome
- dry matter accumulation in shoots and rootse0
- Direction
- negatively affectede0
- Qualifier
- Such physiological changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Such physiological changes negatively affected dry matter accumulation in the grains and the number of grains, as well as dry matter accumulation in shoots and roots.”
t0“peanuts”
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