Abstract
Citrus, one of the world’s most important crops, is facing significant challenges due to drought events. Previous studies have demonstrated that tetraploid rootstocks may exhibit greater tolerance to abiotic stresses than their diploid counterparts. The effects of combining a tetraploid rootstock with a triploid scion under water deficit conditions have not been thoroughly explored. A water deficit experiment was conducted under controlled pot conditions using four citrus scion/rootstock combinations: diploid and tetraploid Swingle citrumelo rootstocks grafted with diploid Mexican lime and triploid Persian lime. Physiological, biochemical, and transcriptomic analyses under controlled pot condition revealed that tetraploid rootstocks exhibited significantly improved performance under drought stress, with an even greater effect when the scion was the triploid Persian lime. In that condition, the improved resilience was associated with reduced water consumption, higher photosynthesis, increased stomatal conductance and transpiration under water stress conditions. Elevated abscisic acid levels and stronger antioxidant activity in polyploid rootstocks further contributed to the stress response. Transcriptomic data revealed distinct gene expression changes in roots and leaves, influenced by organ ploidy and rootstock-scion interactions. Taken together our results provide insights into drought adaptation mechanisms including osmotic adjustment, oxidative stress protection, sustained photosynthesis, antioxidant enzyme activity and enhanced synthesis of protective barriers. These findings underscore ploidy’s role at both rootstock and scion levels in shaping the plant’s response to water deficit, revealing useful interactions between rootstock and scion influencing drought resilience.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
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Claims 13
Claim · model-written summary
Tetraploid rootstocks performed better under drought stress, especially with triploid Persian lime scions.
- Material
- triploid Persian limee0
- Treatment
- tetraploid rootstockse0
- Outcome
- improved performancee0
- Direction
- improvede0
- Qualifier
- under drought stresse0
CitrusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tetraploid rootstocks exhibited significantly improved performance under drought stress, with an even greater effect when the scion was the triploid Persian lime”
t0“citrus”
Claim · model-written summary
Under water stress, the improved resilience of polyploid citrus was associated with reduced water consumption.
- Material
- triploid Persian limee1
- Outcome
- water consumptione0
- Direction
- reducede0
- Qualifier
- under water stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the improved resilience was associated with reduced water consumption, higher photosynthesis, increased stomatal conductance and transpiration under water stress conditions”
t0“citrus”
e1“the triploid Persian lime”
Claim · model-written summary
Under water stress, the improved resilience of polyploid citrus was associated with higher photosynthesis.
- Material
- triploid Persian limee1
- Outcome
- photosynthesise0
- Direction
- highere0
- Qualifier
- under water stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the improved resilience was associated with reduced water consumption, higher photosynthesis, increased stomatal conductance and transpiration under water stress conditions”
t0“citrus”
e1“the triploid Persian lime”
Claim · model-written summary
Under water stress, the improved resilience of polyploid citrus was associated with increased stomatal conductance.
- Material
- triploid Persian limee1
- Outcome
- stomatal conductancee0
- Direction
- increasede0
- Qualifier
- under water stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the improved resilience was associated with reduced water consumption, higher photosynthesis, increased stomatal conductance and transpiration under water stress conditions”
t0“citrus”
e1“the triploid Persian lime”
Claim · model-written summary
Under water stress, the improved resilience of polyploid citrus was associated with increased transpiration.
- Material
- triploid Persian limee1
- Outcome
- transpiratione0
- Direction
- increasede0
- Qualifier
- under water stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the improved resilience was associated with reduced water consumption, higher photosynthesis, increased stomatal conductance and transpiration under water stress conditions”
t0“citrus”
e1“the triploid Persian lime”
Claim · model-written summary
Polyploid rootstocks had elevated abscisic acid levels contributing to stress response.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated abscisic acid levels and stronger antioxidant activity in polyploid rootstocks further contributed to the stress response”
t0“citrus”
Claim · model-written summary
Polyploid rootstocks had stronger antioxidant activity contributing to stress response.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated abscisic acid levels and stronger antioxidant activity in polyploid rootstocks further contributed to the stress response”
t0“citrus”
Claim · model-written summary
Root and leaf gene expression changes varied with organ ploidy and rootstock-scion interactions.
- Organ / stage
- roots and leavese0
- Outcome
- gene expression changese0
- Qualifier
- organ ploidy and rootstock-scion interactionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transcriptomic data revealed distinct gene expression changes in roots and leaves, influenced by organ ploidy and rootstock-scion interactions”
t0“citrus”
Claim · model-written summary
Authors identified osmotic adjustment as part of citrus drought adaptation.
- Outcome
- osmotic adjustmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“our results provide insights into drought adaptation mechanisms including osmotic adjustment, oxidative stress protection, sustained photosynthesis, antioxidant enzyme activity and enhanced synthesis of protective barriers”
t0“citrus”
Claim · model-written summary
Authors identified oxidative stress protection as part of citrus drought adaptation.
- Outcome
- oxidative stress protectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“our results provide insights into drought adaptation mechanisms including osmotic adjustment, oxidative stress protection, sustained photosynthesis, antioxidant enzyme activity and enhanced synthesis of protective barriers”
t0“citrus”
Claim · model-written summary
Authors identified sustained photosynthesis as part of citrus drought adaptation.
- Outcome
- sustained photosynthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“our results provide insights into drought adaptation mechanisms including osmotic adjustment, oxidative stress protection, sustained photosynthesis, antioxidant enzyme activity and enhanced synthesis of protective barriers”
t0“citrus”
Claim · model-written summary
Authors identified antioxidant enzyme activity as part of citrus drought adaptation.
- Outcome
- antioxidant enzyme activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“our results provide insights into drought adaptation mechanisms including osmotic adjustment, oxidative stress protection, sustained photosynthesis, antioxidant enzyme activity and enhanced synthesis of protective barriers”
t0“citrus”
Claim · model-written summary
Authors identified enhanced synthesis of protective barriers as part of citrus drought adaptation.
- Outcome
- enhanced synthesis of protective barrierse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“our results provide insights into drought adaptation mechanisms including osmotic adjustment, oxidative stress protection, sustained photosynthesis, antioxidant enzyme activity and enhanced synthesis of protective barriers”
t0“citrus”