Abstract
Two pot experiments were conducted at Agricultural Farm, Faculty of Agriculture, Mansoura University during the two successive seasons of 1990 and 1991 to investigate the effect of salinity (0, 1000, 2000 and 3000 ppm) of irrigation water and cycocel (0, 1000 and 2000 ppm) on vegetative growth, photosynthetic efficiency and productivity of snap bean plants. The obtained data could be summarized as follows: 1- The irrigation water contained salinity up to 1000 ppm had no adverse effect on the growth parameters, particularly plant height, fresh and dry weight of whole plant and its organs. 2- All plant growth parameters gradually and considerably deceased by increasing level of salinity between 1000 and 3000 ppm. 3- Photosynthetic pigment contents decreased with increasing salinity level, total leaf area and net assimilation rate followed the same trend. 4- Salinity levels had no clear effect on the appearance of the first flowers but the period between flowering to the pod harvesting was more shorter, than control with increasing the salinity levels. 5- The pod yield and pod characteristics of snap bean decreased by increasing salinity levels. 6- With increasing salinity N and K contents in leaves tissues were significantly reduced whereas, P content was not affected. 7- Total fresh and dry weight, total leaf area/plant, net assimilation rate and pigments content tended to increase with the application of cycocel under salinity effect. 8- Cycocel application had no great effect on flowering processes and yield characteristics. 9- Cycocel treatments caused an increase in N and a decrease in P and K contents. Under different salinity levels, cycocel application increased the N and decreased P and K contents. 10- Spraying cycocel on the snap bean plant which were irrigated with saline water could be counteracted the inhibition effect of salinity. Since the results indicated that, using cycocel increase the resistance of snap bean to salinity up to 2000 ppm.
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Claims 15
Claim · model-written summary
Salinity up to 1000 ppm had no adverse effect on growth parameters.
- Taxon
- snap beane1
- Treatment
- salinity up to 1000 ppme0
- Outcome
- growth parameters, particularly plant height, fresh and dry weighte0
- Direction
- no adverse effecte0
Not reportedComparator
Verbatim
e0“salinity up to 1000 ppm had no adverse effect on the growth parameters, particularly plant height, fresh and dry weight of whole plant and its organs”
e1“snap bean plants”
Claim · model-written summary
Growth parameters decreased as salinity rose from 1000 to 3000 ppm.
- Taxon
- snap beane1
- Treatment
- increasing level of salinity between 1000 and 3000 ppme0
- Outcome
- plant growth parameterse0
- Direction
- deceasede0
Not reportedComparator
Verbatim
e0“All plant growth parameters gradually and considerably deceased by increasing level of salinity between 1000 and 3000 ppm.”
e1“snap bean plants”
Claim · model-written summary
Increasing salinity lowered photosynthetic pigments, leaf area and net assimilation rate.
- Taxon
- snap beane1
- Treatment
- increasing salinity levele0
- Outcome
- Photosynthetic pigment contentse0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Photosynthetic pigment contents decreased with increasing salinity level, total leaf area and net assimilation rate followed the same trend.”
e1“snap bean plants”
Claim · model-written summary
Salinity had no clear effect on first flowering.
- Taxon
- snap beane1
- Treatment
- Salinity levelse0
- Outcome
- appearance of the first flowerse0
- Direction
- no clear effecte0
Not reportedComparator
Verbatim
e0“Salinity levels had no clear effect on the appearance of the first flowers”
e1“snap bean plants”
Claim · model-written summary
Increasing salinity shortened the flowering-to-harvest period relative to control.
Verbatim
e0“the period between flowering to the pod harvesting was more shorter, than control with increasing the salinity levels”
e1“snap bean plants”
Claim · model-written summary
Pod yield and pod characteristics decreased with greater salinity.
- Taxon
- snap beane0
- Treatment
- increasing salinity levelse0
- Outcome
- pod yield and pod characteristicse0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“The pod yield and pod characteristics of snap bean decreased by increasing salinity levels.”
Claim · model-written summary
Increasing salinity significantly reduced leaf N and K.
- Taxon
- snap beane1
- Treatment
- increasing salinitye0
- Outcome
- N and K contents in leaves tissuese0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“With increasing salinity N and K contents in leaves tissues were significantly reduced”
e1“snap bean plants”
Claim · model-written summary
Increasing salinity did not affect leaf P content.
Not reportedComparator
Verbatim
e0“P content was not affected”
e1“With increasing salinity N and K contents in leaves tissues”
e2“snap bean plants”
Claim · model-written summary
Cycocel under salinity tended to raise biomass, leaf area, assimilation and pigment content.
- Taxon
- snap beane1
- Treatment
- application of cycocel under salinity effecte0
- Outcome
- Total fresh and dry weight, total leaf area/plant, net assimilation rate and pigments contente0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“Total fresh and dry weight, total leaf area/plant, net assimilation rate and pigments content tended to increase with the application of cycocel under salinity effect.”
e1“snap bean plants”
Claim · model-written summary
Cycocel had little effect on flowering and yield characteristics.
- Taxon
- snap beane1
- Treatment
- Cycocel applicatione0
- Outcome
- flowering processes and yield characteristicse0
- Direction
- no great effecte0
Not reportedComparator
Verbatim
e0“Cycocel application had no great effect on flowering processes and yield characteristics.”
e1“snap bean plants”
Claim · model-written summary
Cycocel increased leaf N content.
Not reportedComparator
Verbatim
e0“Cycocel treatments caused an increase in N”
e1“snap bean plants”
Claim · model-written summary
Cycocel decreased leaf P and K contents.
Not reportedComparator
Verbatim
e0“Cycocel treatments caused an increase in N and a decrease in P and K contents.”
e1“snap bean plants”
Claim · model-written summary
Under varying salinity cycocel increased N content.
- Taxon
- snap beane1
- Treatment
- cycocel applicatione0
- Outcome
- Ne0
- Direction
- increasede0
- Qualifier
- Under different salinity levelse0
Not reportedComparator
Verbatim
e0“Under different salinity levels, cycocel application increased the N”
e1“snap bean plants”
Claim · model-written summary
Under varying salinity cycocel decreased P and K contents.
- Taxon
- snap beane1
- Treatment
- cycocel applicatione0
- Outcome
- P and K contentse0
- Direction
- decreasede0
- Qualifier
- Under different salinity levelse0
Not reportedComparator
Verbatim
e0“Under different salinity levels, cycocel application increased the N and decreased P and K contents.”
e1“snap bean plants”
Claim · model-written summary
The authors conclude that cycocel can counteract salinity inhibition up to 2000 ppm.
Verbatim
e0“Spraying cycocel on the snap bean plant which were irrigated with saline water could be counteracted the inhibition effect of salinity. Since the results indicated that, using cycocel increase the resistance of snap bean to salinity up to 2000 ppm.”
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