Abstract
In some areas dedicated to the cultivation of peach plants, soils are characterized by high levels of zinc (Zn) as a consequence of successive applications of Zn-containing fungicides and/or of animal manure as fertilizers. In these cases, the choice of the most appropriate rootstock is the prerequisite for the productive success of the orchard. Therefore, this work aimed at evaluating the tolerance of three peach rootstocks grown in soils characterized by different levels of Zn availability. To this purpose, samples of a Typic Hapludalf soil were collected in a natural grassland in southern Brazil. The soil was dried, sieved, and acidity and phosphorus and potassium contents were corrected. Afterwards, the soil was subjected to application of 0, 15, 30, 60 and 120 mg Zn kg-1. In each treatment, three types of peach rootstocks (Tsukuba-1, Rigitano and Flordaguard) were grown in rhizoboxes using a completely randomized experimental design for 65 days. The dry matter production of leaves, branches and rootstock, as well as the increase in height and stem diameter were measured. Total contents of Zn, iron, nitrogen, phosphorus, calcium and magnesium were analyzed in each organ and the photosynthetic pigments and catalase (CAT) activity were analyzed in the leaves. Concentrations of Zn increased linearly in all organs of all cultivars. However, the Tsukuba-1 rootstock presented greater sensitivity to high levels of Zn availability in soil, with a reduction in leaf dry matter production, chlorophyll a and carotenoid contents, and CAT activity. Surprisingly, the Flordaguard rootstock showed an increase in height due to the increase in Zn applied to the soil. Differently, the development of Rigitano rootstock plants was unaffected by different levels of Zn availability.
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Claims 6
Claim · model-written summary
Zinc concentrations increased linearly in all organs of all cultivars.
- Taxon
- peach
Prunus persicat0 - Organ / stage
- all organse0
- Treatment
- Zne0
- Outcome
- Concentrations of Zne0
- Direction
- increased linearlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentrations of Zn increased linearly in all organs of all cultivars”
t0“Peach rootstock tolerance to excess zinc in sandy acidic soil”
Claim · model-written summary
Tsukuba-1 leaf dry matter production declined under high soil zinc.
- Taxon
- peachPrunus persicat0
- Material
- Tsukuba-1e0
- Treatment
- high levels of Zn availability in soile0
- Outcome
- leaf dry matter productione0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Tsukuba-1 rootstock presented greater sensitivity to high levels of Zn availability in soil, with a reduction in leaf dry matter production, chlorophyll a and carotenoid contents, and CAT activity”
t0“Peach rootstock tolerance to excess zinc in sandy acidic soil”
Claim · model-written summary
Tsukuba-1 chlorophyll a and carotenoid contents declined under high soil zinc.
- Taxon
- peachPrunus persicat0
- Material
- Tsukuba-1e0
- Treatment
- high levels of Zn availability in soile0
- Outcome
- chlorophyll a and carotenoid contentse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Tsukuba-1 rootstock presented greater sensitivity to high levels of Zn availability in soil, with a reduction in leaf dry matter production, chlorophyll a and carotenoid contents, and CAT activity”
t0“Peach rootstock tolerance to excess zinc in sandy acidic soil”
Claim · model-written summary
Tsukuba-1 catalase activity declined under high soil zinc.
- Taxon
- peachPrunus persicat0
- Material
- Tsukuba-1e0
- Treatment
- high levels of Zn availability in soile0
- Gene
- CATe0
- Outcome
- CAT activitye0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Tsukuba-1 rootstock presented greater sensitivity to high levels of Zn availability in soil, with a reduction in leaf dry matter production, chlorophyll a and carotenoid contents, and CAT activity”
t0“Peach rootstock tolerance to excess zinc in sandy acidic soil”
Claim · model-written summary
Flordaguard height increased with greater soil zinc application.
- Taxon
- peachPrunus persicat0
- Material
- Flordaguarde0
- Treatment
- Zn applied to the soile0
- Outcome
- heighte0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Flordaguard rootstock showed an increase in height due to the increase in Zn applied to the soil”
t0“Peach rootstock tolerance to excess zinc in sandy acidic soil”
Claim · model-written summary
Rigitano development was unaffected by varying zinc availability.
- Taxon
- peachPrunus persicat0
- Material
- Rigitanoe0
- Treatment
- different levels of Zn availabilitye0
- Outcome
- developmente0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the development of Rigitano rootstock plants was unaffected by different levels of Zn availability”
t0“Peach rootstock tolerance to excess zinc in sandy acidic soil”
The same questions in other papers
zinc atom · physiology: antioxidant enzymes · Prunus persica (peach)Positive and negative results
1 in the opposite direction
- positive
zinc atom · growth · Prunus persica (peach)Positive and negative results
2 in the opposite direction
- positive
- positive
zinc atom · physiology: pigments · Prunus persica (peach)Positive and negative results
2 in the opposite direction
- positive
- positive
zinc atom · yield · Prunus persica (peach)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
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.