Abstract
Plants’ biochemical responses to water deficit are associated with their ability to synthesize accumulate osmolytes compatible to regulatory properties of water potential. The aim of the current study is to evaluate carbon and nitrogen metabolism in Tachigali vulgaris plants subjected to three water suspension periods. The experiment was carried out in greenhouse and followed a completely randomized design, at 3 x 2 factorial arrangement (three times: zero, five and ten water suspension days; and two water conditions: control and water deficit), with 4 repetitions; results were subjected to analysis of variance and means were compared through t-test at 5% probability level, in statistical package (Assistat 7.7 beta). The following variables recorded decreased values: relative water content RWC in leaf tissue (by 32.14%); nitrate ion in leaves (by 18.67%) and in roots (by 14.40%); nitrate reductase enzyme activity in leaves (by 17.06%) and roots (by 15.77%); starch concentration in leaf tissue (by 44.98%) and roots (by 21.07%). On the other hand, the following variables recorded increased values: free ammonium concentration in leaves (by 64.83%) and roots (by 1.61%); total soluble amino acids in leaf tissue (by 28.03%) and roots (by 8.42%); total soluble carbohydrates in leaves (by 3.12%) and roots (by 11.05%); sucrose in leaves (by 4.77%) and roots (by 24.77%); proline in leaves (by 193.58%) and roots (by 57.26%). Biochemical processes observed in T. vulgaris plants were affected by water deficit, which indicated that this species is capable of adopting mechanisms and strategies in order to survive under stressful conditions.
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Claims 17
Claim · model-written summary
Leaf relative water content decreased by 32.14%.
- Organ / stage
- leaf tissuee0
- Outcome
- relative water content RWCe0
- Direction
- decreaseinferrede0
- Value
- 32.14%e0
Not reportedTaxonTreatmentComparator
Verbatim
e0“relative water content RWC in leaf tissue (by 32.14%)”
Claim · model-written summary
Leaf nitrate decreased by 18.67%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“nitrate ion in leaves (by 18.67%)”
Claim · model-written summary
Root nitrate decreased by 14.40%.
Not reportedTaxonTreatmentComparatorOutcome
Verbatim
e0“in roots (by 14.40%)”
Claim · model-written summary
Leaf nitrate reductase activity decreased by 17.06%.
- Organ / stage
- leavese0
- Gene
- nitrate reductasee0
- Outcome
- nitrate reductase enzyme activitye0
- Direction
- decreaseinferrede0
- Value
- 17.06%e0
Not reportedTaxonTreatmentComparator
Verbatim
e0“nitrate reductase enzyme activity in leaves (by 17.06%)”
Claim · model-written summary
Root nitrate reductase activity decreased by 15.77%.
Not reportedTaxonTreatmentComparatorOutcome
Verbatim
e0“and roots (by 15.77%)”
Claim · model-written summary
Leaf starch concentration decreased by 44.98%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“starch concentration in leaf tissue (by 44.98%)”
Claim · model-written summary
Root starch concentration decreased by 21.07%.
Not reportedTaxonTreatmentComparatorOutcome
Verbatim
e0“and roots (by 21.07%)”
Claim · model-written summary
Leaf free ammonium increased by 64.83%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“free ammonium concentration in leaves (by 64.83%)”
Claim · model-written summary
Root free ammonium increased by 1.61%.
Not reportedTaxonTreatmentComparatorOutcome
Verbatim
e0“and roots (by 1.61%)”
Claim · model-written summary
Leaf soluble amino acids increased by 28.03%.
- Organ / stage
- leaf tissuee0
- Outcome
- total soluble amino acidse0
- Direction
- increaseinferrede0
- Value
- 28.03%e0
Not reportedTaxonTreatmentComparator
Verbatim
e0“total soluble amino acids in leaf tissue (by 28.03%)”
Claim · model-written summary
Root soluble amino acids increased by 8.42%.
Not reportedTaxonTreatmentComparatorOutcome
Verbatim
e0“and roots (by 8.42%)”
Claim · model-written summary
Leaf soluble carbohydrates increased by 3.12%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“total soluble carbohydrates in leaves (by 3.12%)”
Claim · model-written summary
Root soluble carbohydrates increased by 11.05%.
Not reportedTaxonTreatmentComparatorOutcome
Verbatim
e0“and roots (by 11.05%)”
Claim · model-written summary
Leaf sucrose increased by 4.77%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“sucrose in leaves (by 4.77%)”
Claim · model-written summary
Root sucrose increased by 24.77%.
Not reportedTaxonTreatmentComparatorOutcome
Verbatim
e0“and roots (by 24.77%)”
Claim · model-written summary
Leaf proline increased by 193.58%.
Not reportedTaxonTreatmentComparator
Verbatim
e0“proline in leaves (by 193.58%)”
Claim · model-written summary
Root proline increased by 57.26%.
Not reportedTaxonTreatmentComparatorOutcome
Verbatim
e0“and roots (by 57.26%)”