Abstract
Salinity is one of the major factors limiting avocado yield, primarily due to the high concentration of ions in irrigation water. An experiment was conducted on 2 year old avocado plants (Persea americana Mill.) cv. Hass, grafted onto Duke 7 clonal rootstock growing in pots, to determine the effect of salt stress on growth, as well as physiological and biochemical responses, and the effect of seaweed extract (Ascophyllum nodosum) on salinity stress. Treatments consisted of different types of irrigation water: distilled water, 9 mM NaCl water, distilled water + 2.25 mL of seaweed extract, 9 mM NaCl water + 2.25 mL of seaweed extract and, 9 mM NaCl water + 1.5 mL of seaweed extract. The irrigation treatment was applied every 15 days for 8 months. Treatments with salt reduced plant growth by approximately 50% of the fresh weight of all avocado plant tissues. Seaweed extract reduced the effects of abiotic stress only at an early stage, and increased potassium (K) and calcium (Ca) concentrations in leaves.
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Claims 3
Claim · model-written summary
Salt irrigation reduced avocado fresh weight by approximately 50%.
- Taxon
- avocado
Persea americanae1 - Material
- Hasse3
- Treatment
- salte1
- Outcome
- fresh weighte1
- Direction
- reducede1
- Value
- approximately 50%e1
- Comparator
- distilled watere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Treatments with salt reduced plant growth by approximately 50% of the fresh weight of all avocado plant tissues”
e2“distilled water, 9 mM NaCl water”
e3“avocado plants (Persea americana Mill.) cv. Hass”
Claim · model-written summary
Seaweed extract reduced the effects of abiotic stress on avocado only at an early stage.
- Taxon
- avocadoPersea americanae3
- Treatment
- Seaweed extracte4
- Outcome
- effects of abiotic stresse4
- Direction
- reducede4
- Qualifier
- only at an early stagee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“avocado plants (Persea americana Mill.) cv. Hass”
e4“Seaweed extract reduced the effects of abiotic stress only at an early stage”
Claim · model-written summary
Seaweed extract increased leaf potassium and calcium concentrations in avocado.
- Taxon
- avocadoPersea americanae3
- Organ / stage
- leavese5
- Treatment
- Seaweed extracte4
- Outcome
- potassium (K) and calcium (Ca) concentrationse5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“avocado plants (Persea americana Mill.) cv. Hass”
e4“Seaweed extract reduced the effects of abiotic stress only at an early stage”
e5“increased potassium (K) and calcium (Ca) concentrations in leaves”
The same questions in other papers
salinity · growth · Persea americana (avocado)Results agree
3 papers in the same direction as this paper
- negative
- negative
- no effect
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.