Abstract
The salinity of irrigation water and soil significantly affects the performance of citrus crops in semi-arid and arid areas. This study aimed to evaluate new hybrid citrus rootstocks under different salt stress levels. A total of 0 g, 2 g, and 5 g of NaCl were added to 1l of half-strength Hoagland solution to achieve salinity levels of 1.31, 4, and 9 dS/m, respectively, for irrigation. Six one-year-old cuttings were transplanted into plastic pots and evaluated. After three months of treatment, various responses from the rootstocks to salinity stress were observed. The addition of NaCl to the irrigation solution caused a decrease in fresh weight, dry weight, and chlorophyll content. In addition, proline and chloride contents in the leaves increased with higher salt levels in the irrigation solution. Our results showed that the hybrid H57 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) is salt-sensitive, accumulating five times more chloride compared to 0 g/l NaCl. This was associated with a reduced number of leaves, low chlorophyll content of 0.75 mg/g of fresh weight, and symptoms of leaf toxicity along with low fresh and dry weights. Although the hybrid H56 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) appeared to be salt-tolerant, accumulating less chloride in leaves compared to 0 g/l NaCl, it had a chlorophyll content of 1.23 mg/g of fresh weight, proline levels of 31.1 µg/g of dry weight, and maintained higher fresh and dry weights. These findings highlight the superior salt tolerance of H56 and support its potential as a promising rootstock candidate to be further evaluated in combination with selected scion varieties under saline conditions.
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Claims 14
Claim · model-written summary
Adding NaCl to the irrigation solution decreased fresh weight, dry weight and chlorophyll content of citrus rootstocks.
- Treatment
- addition of NaCl to the irrigation solutione1
- Outcome
- fresh weight, dry weight, and chlorophyll contente1
- Direction
- decreasee1
CitrusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“The addition of NaCl to the irrigation solution caused a decrease in fresh weight, dry weight, and chlorophyll content”
Claim · model-written summary
Proline and chloride contents in the leaves of citrus rootstocks increased with higher salt levels in the irrigation solution.
- Organ / stage
- leavese1
- Treatment
- higher salt levels in the irrigation solutione1
- Outcome
- proline and chloride contents in the leavese1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“proline and chloride contents in the leaves increased with higher salt levels in the irrigation solution”
Claim · model-written summary
Hybrid H57 accumulated five times more chloride than under 0 g/l NaCl.
- Material
- H57e2
- Outcome
- chloridee1
- Direction
- accumulating five times moree1
- Value
- five timese1
- Comparator
- 0 g/l NaCle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“accumulating five times more chloride compared to 0 g/l NaCl”
e2“the hybrid H57 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) is salt-sensitive”
Claim · model-written summary
Hybrid H57 is salt-sensitive.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“the hybrid H57 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) is salt-sensitive”
Claim · model-written summary
Hybrid H57 showed a reduced number of leaves under salinity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“This was associated with a reduced number of leaves”
e2“the hybrid H57 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) is salt-sensitive”
Claim · model-written summary
Hybrid H57 showed symptoms of leaf toxicity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“symptoms of leaf toxicity”
e2“the hybrid H57 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) is salt-sensitive”
Claim · model-written summary
Hybrid H57 had low fresh and dry weights.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“low fresh and dry weights”
e2“the hybrid H57 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) is salt-sensitive”
Claim · model-written summary
Hybrid H57 had low chlorophyll content of 0.75 mg/g of fresh weight.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“low chlorophyll content of 0.75 mg/g of fresh weight”
e2“the hybrid H57 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) is salt-sensitive”
Claim · model-written summary
Hybrid H56 appeared to be salt-tolerant.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“the hybrid H56 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) appeared to be salt-tolerant”
Claim · model-written summary
Hybrid H56 accumulated less chloride in leaves than under 0 g/l NaCl.
- Material
- H56e2
- Organ / stage
- leavese1
- Outcome
- chloridee1
- Direction
- accumulating lesse1
- Comparator
- 0 g/l NaCle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“accumulating less chloride in leaves compared to 0 g/l NaCl”
e2“the hybrid H56 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) appeared to be salt-tolerant”
Claim · model-written summary
Hybrid H56 had a chlorophyll content of 1.23 mg/g of fresh weight.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“a chlorophyll content of 1.23 mg/g of fresh weight”
e2“the hybrid H56 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) appeared to be salt-tolerant”
Claim · model-written summary
Hybrid H56 had proline levels of 31.1 µg/g of dry weight.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“proline levels of 31.1 µg/g of dry weight”
e2“the hybrid H56 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) appeared to be salt-tolerant”
Claim · model-written summary
Hybrid H56 maintained higher fresh and dry weights.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“maintained higher fresh and dry weights”
e2“the hybrid H56 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) appeared to be salt-tolerant”
Claim · model-written summary
Hybrid H56 is a promising rootstock candidate for further evaluation with scion varieties under saline conditions.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“new hybrid citrus rootstocks”
e1“as a promising rootstock candidate to be further evaluated in combination with selected scion varieties under saline conditions”
e2“the hybrid H56 (Citrus sunki Hort. ex Tan.) x (Citrus paradisi Macf. × Poncirus trifoliata L. Raf.) appeared to be salt-tolerant”