Abstract
ABSTRACT Biochemical responses to direct or bicarbonate-induced iron (Fe) deficiency were compared in two Tunisian native grapevine varieties, Khamri (tolerant) and Balta4 (sensitive), and a tolerant rootstock, 140Ru. Woody cuttings of each genotype were irrigated with a nutrient solution containing one of the following: 20 μM Fe (control), 1 μM Fe (direct Fe-deficiency), or 20 μM Fe + 10 mM HCO3 − (indirect bicarbonate-induced Fe-deficiency). Under direct Fe-deficient conditions, lower leaf chlorosis score and higher chlorophyll and leaf Fe contents were found in Khamri and 140Ru compared with Balta4. Moreover, indirect Fe deficiency caused similar effects on these parameters, which were more pronounced in Balta4. Both tolerant genotypes, Khamri and 140Ru, showed higher roots-acidification capacity and phenol release under the direct Fe deficiency compared with the bicarbonate-induced condition. In the sensitive variety, Balta4, no significant changes were found between the control and Fe-deficient plants. Root Fe(III)-reductase activity was strongly stimulated by both types of Fe deficiency in Khamri and 140Ru, and displayed no significant changes in Balta4. In the three genotypes, root and leaf activities of two Fe-containing enzymes, catalase and guaiacol peroxidase, were significantly affected under Fe deficiency (either direct or induced), though to a greater extent in the sensitive variety, Balta4. The latter also displayed higher leaf malonyldialdehyde (MDA) content, traducing an important membrane lipid peroxidation.
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Claims 9
Claim · model-written summary
Khamri had lower leaf chlorosis than Balta4 under direct iron deficiency.
- Material
- Khamrie0
- Treatment
- direct Fe-deficient conditionse0
- Outcome
- leaf chlorosis scoree0
- Direction
- lowere0
- Comparator
- Balta4e0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under direct Fe-deficient conditions, lower leaf chlorosis score and higher chlorophyll and leaf Fe contents were found in Khamri and 140Ru compared with Balta4.”
t0“Grapevine Genotypes”
Claim · model-written summary
Khamri and 140Ru had higher chlorophyll and leaf Fe contents than Balta4 under direct deficiency.
- Material
- Khamri and 140Rue0
- Treatment
- direct Fe-deficient conditionse0
- Outcome
- chlorophyll and leaf Fe contentse0
- Direction
- highere0
- Comparator
- Balta4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under direct Fe-deficient conditions, lower leaf chlorosis score and higher chlorophyll and leaf Fe contents were found in Khamri and 140Ru compared with Balta4.”
t0“Grapevine Genotypes”
Claim · model-written summary
Indirect Fe deficiency had more pronounced effects on chlorosis, chlorophyll and Fe in Balta4.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, indirect Fe deficiency caused similar effects on these parameters, which were more pronounced in Balta4.”
t0“Grapevine Genotypes”
Claim · model-written summary
Tolerant genotypes had higher root acidification and phenol release under direct than bicarbonate-induced deficiency.
- Material
- Khamri and 140Rue0
- Treatment
- direct Fe deficiencye0
- Outcome
- roots-acidification capacity and phenol releasee0
- Direction
- highere0
- Comparator
- bicarbonate-induced conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both tolerant genotypes, Khamri and 140Ru, showed higher roots-acidification capacity and phenol release under the direct Fe deficiency compared with the bicarbonate-induced condition.”
t0“Grapevine Genotypes”
Claim · model-written summary
Balta4 showed no significant changes between control and Fe-deficient plants.
- Material
- Balta4e0
- Treatment
- Fe-deficient plantse0
- Outcome
- changese0
- Direction
- no significant changese0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the sensitive variety, Balta4, no significant changes were found between the control and Fe-deficient plants.”
t0“Grapevine Genotypes”
Claim · model-written summary
Both Fe deficiency types strongly stimulated root Fe(III)-reductase in Khamri and 140Ru.
- Material
- Khamri and 140Rue0
- Treatment
- both types of Fe deficiencye0
- Gene
- Fe(III)-reductasee0
- Outcome
- Root Fe(III)-reductase activitye0
- Direction
- strongly stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root Fe(III)-reductase activity was strongly stimulated by both types of Fe deficiency in Khamri and 140Ru, and displayed no significant changes in Balta4.”
t0“Grapevine Genotypes”
Claim · model-written summary
Balta4 root Fe(III)-reductase showed no significant change.
- Material
- Balta4e0
- Treatment
- both types of Fe deficiencye0
- Outcome
- Root Fe(III)-reductase activitye0
- Direction
- no significant changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root Fe(III)-reductase activity was strongly stimulated by both types of Fe deficiency in Khamri and 140Ru, and displayed no significant changes in Balta4.”
t0“Grapevine Genotypes”
Claim · model-written summary
Fe deficiency significantly affected root and leaf catalase and guaiacol peroxidase activity in all three genotypes, especially Balta4.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the three genotypes, root and leaf activities of two Fe-containing enzymes, catalase and guaiacol peroxidase, were significantly affected under Fe deficiency (either direct or induced), though to a greater extent in the sensitive variety, Balta4.”
t0“Grapevine Genotypes”
Claim · model-written summary
Balta4 had higher leaf MDA content.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The latter also displayed higher leaf malonyldialdehyde (MDA) content, traducing an important membrane lipid peroxidation.”
t0“Grapevine Genotypes”
e1“greater extent in the sensitive variety, Balta4”
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See all 11 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.