Abstract
Rootstock differences influence the salt tolerance of fruit trees and vine crops because of varietal differences in absorption and transport of sodium and chloride. The influence of salinity and Mexican-Guatemalan parentage rootstock on Mass seedling growth is under study at Brokaw Nurseries, Saticoy. Eight rootstock varieties (Clonals: Borchard, G755c, Duke 7, Huntalas, G6, Lula 3, and Duke 6; and the nonclonal Walter Hole) grafted to Hass were grown to an age of 1.5 years at three salinity levels (2.9, 3.6, and 4.5 dS/m) in sand media. Seedling height, quality, and trunk diameter were measured five times after seedling establishment and salinization of the growth media. The chloride and sodium content of leaves, stems, and roots were also measured. For the 4,5 dS/m salinity treatment, Borchard performed the best: the final height was 2.3 times that at the beginning of the experiment. G755c was next best: the corresponding height increase was 1.7 times. Salinity had little effect on the growth of Borchard and G755c, whereas growth decreased with salinity for Duke 7, Huntalas, Walter Hole, Lula 3, G6, and Duke 6. The latter two were unable to survive at 4.5 dS/m. Chloride content for leaves ranged from 0.1 to 0.6 percent and from 0.05 to 0.5 percent for stems. Growth, G, decreased with increasing chloride content, Cl, in the leaves and stems. The regression equation for leaves was G = 3.95 - 11.0 Cl + 11.2 Cl 2 (r 2 = 47 percent), where growth is expressed as the ratio of plant height at the end of the experiment divided by that at the beginning. Chloride content is expressed as a percent of the dry weight. For stems, the corresponding equation was G = 3.5 -12.7 Cl + 17.5 Cl 2 (r 2 = 70 percent). Sodium content in the leaves was low (overall average = 0.05%), as compared to 0.45% in the stems. In contrast to chloride, growth and stem sodium content were not correlated (r 2 = 27 percent).
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Claims 13
Claim · model-written summary
At 4,5 dS/m Borchard height reached 2.3 times its starting height.
- Taxon
- Avocado
Persea americanat0 - Material
- Borcharde0
- Treatment
- 4,5 dS/m salinity treatmente0
- Outcome
- final heighte0
- Direction
- 2.3 timese0
- Value
- 2.3 timese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“For the 4,5 dS/m salinity treatment, Borchard performed the best: the final height was 2.3 times that at the beginning of the experiment.”
Claim · model-written summary
At 4,5 dS/m G755c height reached 1.7 times its starting height.
- Taxon
- AvocadoPersea americanat0
- Material
- G755ce0
- Outcome
- height increasee0
- Direction
- increasee0
- Value
- 1.7 timese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“G755c was next best: the corresponding height increase was 1.7 times.”
Claim · model-written summary
Salinity had little effect on Borchard growth.
- Taxon
- AvocadoPersea americanat0
- Material
- Borcharde0
- Treatment
- Salinitye0
- Outcome
- growth of Borcharde0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“Salinity had little effect on the growth of Borchard and G755c”
Claim · model-written summary
Salinity had little effect on G755c growth.
- Taxon
- AvocadoPersea americanat0
- Material
- G755ce0
- Treatment
- Salinitye0
- Outcome
- growth of Borchard and G755ce0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“Salinity had little effect on the growth of Borchard and G755c”
Claim · model-written summary
Growth decreased with salinity in Duke 7, Huntalas and Walter Hole.
- Taxon
- AvocadoPersea americanat0
- Material
- Duke 7, Huntalas, Walter Holee0
- Treatment
- salinitye0
- Outcome
- growthe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“growth decreased with salinity for Duke 7, Huntalas, Walter Hole, Lula 3, G6, and Duke 6”
Claim · model-written summary
Growth decreased with salinity in Lula 3, G6 and Duke 6.
- Taxon
- AvocadoPersea americanat0
- Material
- Lula 3, G6, and Duke 6e0
- Treatment
- salinitye0
- Outcome
- growthe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“growth decreased with salinity for Duke 7, Huntalas, Walter Hole, Lula 3, G6, and Duke 6”
Claim · model-written summary
G6 and Duke 6 did not survive at 4.5 dS/m.
- Taxon
- AvocadoPersea americanat0
- Material
- G6, and Duke 6e0
- Treatment
- 4.5 dS/me0
- Outcome
- unable to survivee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“G6, and Duke 6. The latter two were unable to survive at 4.5 dS/m.”
Claim · model-written summary
Leaf chloride content ranged from 0.1 to 0.6 percent.
- Taxon
- AvocadoPersea americanat0
- Organ / stage
- leavese0
- Outcome
- Chloride content for leavese0
- Value
- 0.1 to 0.6 percente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“Chloride content for leaves ranged from 0.1 to 0.6 percent”
Claim · model-written summary
Stem chloride content ranged from 0.05 to 0.5 percent.
- Taxon
- AvocadoPersea americanat0
- Organ / stage
- stemse0
- Outcome
- stemse0
- Value
- 0.05 to 0.5 percente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“from 0.05 to 0.5 percent for stems”
Claim · model-written summary
Growth decreased as leaf chloride content increased, with r squared 47 percent.
- Taxon
- AvocadoPersea americanat0
- Organ / stage
- leavese0
- Compound
- chloridee0
- Outcome
- Growthe0
- Direction
- decreasede0
- Value
- 47 percente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“Growth, G, decreased with increasing chloride content, Cl, in the leaves and stems.”
e1“The regression equation for leaves was G = 3.95 - 11.0 Cl + 11.2 Cl 2 (r 2 = 47 percent)”
Claim · model-written summary
Growth decreased as stem chloride content increased, with r squared 70 percent.
- Taxon
- AvocadoPersea americanat0
- Organ / stage
- stemse0
- Compound
- chloridee0
- Outcome
- Growthe0
- Direction
- decreasede0
- Value
- 70 percente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“Growth, G, decreased with increasing chloride content, Cl, in the leaves and stems.”
e1“For stems, the corresponding equation was G = 3.5 -12.7 Cl + 17.5 Cl 2 (r 2 = 70 percent).”
Claim · model-written summary
Leaf sodium content averaged 0.05%, versus 0.45% in stems.
- Taxon
- AvocadoPersea americanat0
- Outcome
- Sodium content in the leavese0
- Value
- 0.05%e0
- Qualifier
- 0.45%e0
- Comparator
- stemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“Sodium content in the leaves was low (overall average = 0.05%), as compared to 0.45% in the stems.”
Claim · model-written summary
Growth and stem sodium content were not correlated, with r squared 27 percent.
- Taxon
- AvocadoPersea americanat0
- Organ / stage
- steme0
- Compound
- sodiume0
- Outcome
- growthe0
- Direction
- not correlatede0
- Value
- 27 percente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avocado Seedling”
e0“growth and stem sodium content were not correlated (r 2 = 27 percent).”
The same questions in other papers
salinity · growth · Persea americana (avocado)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.