Abstract
Abstract Drought tolerance is a major trait for the selection of citrus rootstocks in breeding programs. PEG 4000 solution at 110 g L-1 (osmotic potential of -376 kPa) was used to evaluate biometric, physiological, and biochemical responses of grafted citrus plants in pots. ‘Valencia’ sweet orange plants grafted onto ‘Rangpur’ lime (drought tolerant) rootstock showed greater plant growth compared to that on ‘Swingle’ citrumelo (drought sensitive) rootstock, regardless of PEG-induced stress; however, biological responses to PEG were similar on both rootstocks. Plant dry weight, gas exchange, and leaf and root starch concentrations were reduced by PEG. Water potential at 2:00 p.m. and Fe and Mn leaf concentrations increased with severe phytotoxic symptoms. The results corroborate the limitation of PEG for assessing drought tolerance of citrus plants at the whole plant level.
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Claims 7
Claim · model-written summary
Plants on Rangpur lime rootstock showed greater plant growth than plants on citrumelo rootstock regardless of PEG-induced stress.
- Outcome
- plant growthe1
- Direction
- greatere1
- Qualifier
- regardless of PEG-induced stresse2
- Comparator
- citrumeloe2
CitrusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grafted citrus plants”
e1“showed greater plant growth compared to that on”
e2“citrumelo (drought sensitive) rootstock, regardless of PEG-induced stress”
Claim · model-written summary
Biological responses to PEG were similar on both citrus rootstocks.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grafted citrus plants”
e3“biological responses to PEG were similar on both rootstocks”
Claim · model-written summary
PEG reduced plant dry weight of grafted citrus plants.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grafted citrus plants”
e4“Plant dry weight, gas exchange, and leaf and root starch concentrations were reduced by PEG”
Claim · model-written summary
PEG reduced gas exchange and leaf and root starch concentrations of grafted citrus plants.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grafted citrus plants”
e4“Plant dry weight, gas exchange, and leaf and root starch concentrations were reduced by PEG”
Claim · model-written summary
Water potential at 2:00 p.m. increased in citrus plants with severe phytotoxic symptoms.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grafted citrus plants”
e5“Water potential at 2:00 p.m. and Fe and Mn leaf concentrations increased with severe phytotoxic symptoms”
Claim · model-written summary
Fe and Mn leaf concentrations increased in citrus plants with severe phytotoxic symptoms.
- Outcome
- Fe and Mn leaf concentrationse5
- Direction
- increasede5
- Qualifier
- with severe phytotoxic symptomse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grafted citrus plants”
e5“Water potential at 2:00 p.m. and Fe and Mn leaf concentrations increased with severe phytotoxic symptoms”
Claim · model-written summary
The results support that PEG is limited as a method for assessing drought tolerance of citrus plants at the whole plant level.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The results corroborate the limitation of PEG for assessing drought tolerance of citrus plants at the whole plant level”
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