Abstract
Abstract Peach varieties grafted on the rootstock “Nemaguard” (Prunus persica (L.) Batsch) usually show chlorosis when grown in calcareous soils. This chlorosis can be corrected by applying iron chelates to the soil. In this work we present results on the behavior of “Nemaguard” seedlings grown in nutrient solutions with different concentrations of bicarbonate and Fe as FeEDDHA. Chlorosis degree was increased by either increasing bicarbonate (0–15 mM) or decreasing Fe (100–0 μM). Shoot dry weight was decreased in chlorotic plants, but also in green plants grown with bicarbonate (15 mM) and high Fe (100 μM). This indicates that the growth decrease caused by bicarbonate is not only related to Fe deficiency chlorosis. When plants were grown with 10 mM bicarbonate and 2.5 μM Fe and showed clear chlorosis symptoms, they were transferred to a similar nutrient solution but with 100 μM Fe. After one week plant regreening was appreciable, in particular in the youngest leaves. The root Fe(III) reducing capacity was measured in a medium with absence of bicarbonate and in the presence of 10 mM MES, at pH 5.0, for 2h and 30 min. In the treatment with 10 mM bicarbonate and 2.5 μM Fe, roots had a very low reducing capacity and plants became chlorotic. However, these plants markedly increased their reducing capacity just one day after transferring them to a similar nutrient solution but with 100 μM Fe, despite they were still very chlorotic. These results show that bicarbonate inhibits the development of reducing capacity under low Fe conditions but not at higher Fe levels. It is assumed that under field conditions both the induction of chlorosis and the regreening process may be partly consequence of changes in the reducing capacity.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Higher bicarbonate increased chlorosis in Nemaguard seedlings.
- Taxon
- peach
Prunus persicat0 - Material
- “Nemaguard”t0
- Treatment
- increasing bicarbonate (0–15 mM)e0
- Outcome
- Chlorosis degreee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorosis degree was increased by either increasing bicarbonate (0–15 mM) or decreasing Fe (100–0 μM).”
t0“peach rootstock “Nemaguard””
Claim · model-written summary
Lower Fe increased chlorosis in Nemaguard seedlings.
- Taxon
- peachPrunus persicat0
- Material
- “Nemaguard”t0
- Treatment
- decreasing Fe (100–0 μM)e0
- Outcome
- Chlorosis degreee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorosis degree was increased by either increasing bicarbonate (0–15 mM) or decreasing Fe (100–0 μM).”
t0“peach rootstock “Nemaguard””
Claim · model-written summary
Chlorotic plants had decreased shoot dry weight.
- Taxon
- peachPrunus persicat0
- Material
- “Nemaguard”t0
- Outcome
- Shoot dry weighte0
- Direction
- decreasede0
- Qualifier
- chlorotic plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight was decreased in chlorotic plants”
t0“peach rootstock “Nemaguard””
Claim · model-written summary
Bicarbonate with high Fe decreased shoot dry weight even in green plants.
- Taxon
- peachPrunus persicat0
- Material
- “Nemaguard”t0
- Treatment
- bicarbonate (15 mM) and high Fe (100 μM)e0
- Outcome
- Shoot dry weighte1
- Direction
- decreasede1
- Qualifier
- green plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in green plants grown with bicarbonate (15 mM) and high Fe (100 μM)”
e1“Shoot dry weight was decreased in chlorotic plants, but also in green plants grown with bicarbonate (15 mM) and high Fe (100 μM).”
t0“peach rootstock “Nemaguard””
Claim · model-written summary
Transfer to 100 μM Fe produced visible regreening after one week, especially in youngest leaves.
- Taxon
- peachPrunus persicat0
- Material
- “Nemaguard”t0
- Organ / stage
- youngest leavese0
- Treatment
- 100 μM Fee1
- Outcome
- plant regreeninge0
- Qualifier
- After one weeke0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After one week plant regreening was appreciable, in particular in the youngest leaves.”
e1“they were transferred to a similar nutrient solution but with 100 μM Fe.”
t0“peach rootstock “Nemaguard””
Claim · model-written summary
Roots under 10 mM bicarbonate and 2.5 μM Fe had very low reducing capacity and plants became chlorotic.
- Taxon
- peachPrunus persicat0
- Material
- “Nemaguard”t0
- Organ / stage
- rootse0
- Treatment
- 10 mM bicarbonate and 2.5 μM Fee0
- Outcome
- roots had a very low reducing capacity and plants became chlorotice0
- Direction
- very lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the treatment with 10 mM bicarbonate and 2.5 μM Fe, roots had a very low reducing capacity and plants became chlorotic.”
t0“peach rootstock “Nemaguard””
Claim · model-written summary
Root reducing capacity increased markedly one day after transfer to 100 μM Fe despite continued chlorosis.
- Taxon
- peachPrunus persicat0
- Material
- “Nemaguard”t0
- Treatment
- 100 μM Fee0
- Outcome
- reducing capacitye0
- Direction
- increasede0
- Qualifier
- just one day after transferring theme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these plants markedly increased their reducing capacity just one day after transferring them to a similar nutrient solution but with 100 μM Fe, despite they were still very chlorotic.”
t0“peach rootstock “Nemaguard””
Claim · model-written summary
The authors inferred that bicarbonate inhibits development of reducing capacity under low Fe but not higher Fe.
- Taxon
- peachPrunus persicat0
- Material
- “Nemaguard”t0
- Treatment
- bicarbonatee0
- Outcome
- development of reducing capacitye0
- Direction
- inhibitse0
- Qualifier
- under low Fe conditions but not at higher Fe levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bicarbonate inhibits the development of reducing capacity under low Fe conditions but not at higher Fe levels.”
t0“peach rootstock “Nemaguard””
Claim · model-written summary
The authors propose that field chlorosis induction and regreening may partly result from changes in reducing capacity.
- Taxon
- peachPrunus persicat0
- Material
- “Nemaguard”t0
- Outcome
- induction of chlorosis and the regreening processe0
- Qualifier
- changes in the reducing capacitye0
- Setting
- field conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under field conditions both the induction of chlorosis and the regreening process may be partly consequence of changes in the reducing capacity.”
t0“peach rootstock “Nemaguard””
The same questions in other papers
iron atom · physiology: pigments · Prunus persica (peach)Positive and negative results
1 paper in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →iron atom · growth · Prunus persica (peach)Positive and negative results
3 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 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.