Abstract
A variety of cellular responses is needed to ensure the plants survival during drought, but little is known about the signaling mechanisms involved in this process. Soybean cultivars (EMBRAPA 48 and BR 16, tolerant and sensitive to drought, respectively) were exposed to the following treatments: control conditions (plants in field capacity), drought (20% of available water in the soil), sodium nitroprusside (SNP) treatment (plants irrigated and treated with 100-µM SNP [SNP-nitric oxide (NO) donor molecule], and Drought + SNP (plants subjected to drought and SNP treatment). Plants remained in these conditions until the reproductive stage and were evaluated for physiological (photosynthetic pigments, chlorophyll a fluorescence and gas exchange rates), hydraulic (water potential, osmotic potential and leaf hydraulic conductivity) and morpho-anatomical traits (biomass, venation density and stomatal characterization). Exposure to water deficit considerably reduced water potential in both cultivars and resulted in decrease in photosynthesis and biomass accumulation. The addition of the NO donor attenuated these damaging effects of water deficit and increased the tolerance index of both cultivars. The results showed that NO was able to reduce plant's water loss, while maintaining their biomass production through alteration in stomatal characteristics, hydraulic conductivity and the biomass distribution pattern. These hydraulic and morpho-anatomical alterations allowed the plants to obtain, transport and lose less water to the atmosphere, even in water deficit conditions.
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Claims 5
Claim · model-written summary
Drought reduced water potential in both soybean cultivars.
- Taxon
- Soybean
Glycine maxt0 - Material
- both cultivarse0
- Treatment
- water deficite0
- Outcome
- water potentiale0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure to water deficit considerably reduced water potential in both cultivars”
t0“soybean”
Claim · model-written summary
Drought decreased soybean photosynthesis and biomass accumulation.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- photosynthesis and biomass accumulatione0
- Direction
- decreasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulted in decrease in photosynthesis and biomass accumulation”
t0“soybean”
Claim · model-written summary
The NO donor attenuated drought damage and increased tolerance in both soybean cultivars.
- Taxon
- SoybeanGlycine maxt0
- Material
- both cultivarse0
- Treatment
- NO donore0
- Outcome
- tolerance indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of the NO donor attenuated these damaging effects of water deficit and increased the tolerance index of both cultivars”
t0“soybean”
Claim · model-written summary
NO reduced soybean water loss while maintaining biomass production.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- NOe0
- Outcome
- plant's water losse0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO was able to reduce plant's water loss, while maintaining their biomass production”
t0“soybean”
Claim · model-written summary
NO altered stomatal characteristics, hydraulic conductivity and biomass distribution.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- NOe0
- Outcome
- stomatal characteristics, hydraulic conductivity and the biomass distribution patterne0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that NO was able to reduce plant's water loss, while maintaining their biomass production through alteration in stomatal characteristics, hydraulic conductivity and the biomass distribution pattern”
t0“soybean”
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