Abstract
N ieman , R. H., and L eon B ernstein . (U. S. Salinity Laboratory, Riverside, Calif.) Interactive effects of gibberellic acid and salinity on the growth of beans. Amer. Jour. Bot. 46(9): 667–670. 1959.—Dwarf red kidney bean plants, grown from the primary leaf stage to maturity on a graded salt series (0, 1.5, 3.0 and 4.5 atm. O.P. NaCl added to a base nutrient solution), showed a progressive and highly significant growth depression with increasing concentration of NaCl. At low levels of salinity (0 and 1.5 atm. O.P.), gibberellic acid applied as a spray to primary leaves, in concentrations of 10 and 100 p.p.m. in distilled water, increased the stem length, fresh and dry wt. of both the top and the root, the yield of green beans, area per leaf, and the total leaf area per plant. At high levels of salinity (3.0 and 4.5 atm. O.P.) growth was so severely suppressed that the expression of all gibberellin effects, except the increase in stem length, was essentially prevented. Gibberellin was, therefore, ineffective in overcoming the salt‐induced suppression of growth. An increased rate of water use per unit leaf area was quite consistently observed with the gibberellin‐treated plants. This may be simply the result of the increased exposure to light and to air movement of leaves on an elongated stem.
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Claims 4
Claim · model-written summary
Increasing NaCl concentration caused a progressive and highly significant depression of growth in dwarf red kidney bean plants.
- Taxon
- Dwarf red kidney bean plantse1
- Treatment
- increasing concentration of NaCle2
- Outcome
- growthe2
- Direction
- depressione2
Not reportedComparator
Verbatim
e1“Dwarf red kidney bean plants”
e2“showed a progressive and highly significant growth depression with increasing concentration of NaCl”
Claim · model-written summary
At low salinity, gibberellic acid sprayed on primary leaves increased stem length and the fresh and dry weight of top and root in kidney bean.
- Taxon
- Dwarf red kidney bean plantse1
- Treatment
- gibberellic acid applied as a spray to primary leavese2
- Outcome
- stem length, fresh and dry wt. of both the top and the roote2
- Direction
- increasede2
- Qualifier
- At low levels of salinity (0 and 1.5 atm. O.P.)e2
Not reportedComparator
Verbatim
e1“Dwarf red kidney bean plants”
e2“At low levels of salinity (0 and 1.5 atm. O.P.), gibberellic acid applied as a spray to primary leaves, in concentrations of 10 and 100 p.p.m. in distilled water, increased the stem length, fresh and dry wt. of both the top and the root”
Claim · model-written summary
At low salinity, gibberellic acid increased the yield of green beans, area per leaf and total leaf area per plant.
- Taxon
- Dwarf red kidney bean plantse1
- Treatment
- gibberellic acid applied as a spray to primary leavese3
- Outcome
- the yield of green beans, area per leaf, and the total leaf area per plante3
- Direction
- increasede3
- Qualifier
- At low levels of salinity (0 and 1.5 atm. O.P.)e3
Not reportedComparator
Verbatim
e1“Dwarf red kidney bean plants”
e3“At low levels of salinity (0 and 1.5 atm. O.P.), gibberellic acid applied as a spray to primary leaves, in concentrations of 10 and 100 p.p.m. in distilled water, increased the stem length, fresh and dry wt. of both the top and the root, the yield of green beans, area per leaf, and the total leaf area per plant”
Claim · model-written summary
At high salinity, growth suppression essentially prevented all gibberellin effects except the increase in stem length.
- Taxon
- Dwarf red kidney bean plantse1
- Treatment
- high levels of salinity (3.0 and 4.5 atm. O.P.)e4
- Outcome
- expression of all gibberellin effectse4
- Direction
- essentially preventede4
- Qualifier
- except the increase in stem lengthe4
Not reportedComparator
Verbatim
e1“Dwarf red kidney bean plants”
e4“At high levels of salinity (3.0 and 4.5 atm. O.P.) growth was so severely suppressed that the expression of all gibberellin effects, except the increase in stem length, was essentially prevented”
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