Abstract
ABSTRACT Salinity is considered an obstacle to the production system that limits the growth and yield of crops around the world. Therefore, it is essential to develop strategies to minimize the effects of salinity and increase yield, especially in the semi-arid region of the Northeast, which has limited water resources of good quality for irrigation. The objective was to evaluate the effects of applying paclobutrazol on zucchini crop under salt stress. The experiment was conducted in a greenhouse, in a randomized block experimental design, in a 2 × 5 factorial scheme, with two salinity levels of irrigation water (0.6 and 4.0 dS m-1) and five concentrations of paclobutrazol - PBZ (0; 2; 4; 6 and 8 g L-1), and with four repetitions. Application of 8 mg L-1 PBZ increases stem diameter in zucchini under irrigation of 4.0 dS m-1. Chlorophyll b and total chlorophyll contents increase with PBZ concentration of 4 mg L-1 and irrigation of 0.6 dS m-1. PBZ concentration of 4 mg L-1 increases the relative water content while reducing electrolyte leakage in zucchini under salinities of 4.0 and 0.6 dS m-1 respectively. Root, stem and leaf dry mass of zucchini increases when plants are irrigated with water of 0.6 dS m-1 and subjected to PBZ concentration of 8 mg L-1. PBZ concentrations do not attenuate the effects of salinity on leaf area, crown volume and diameter, vegetative vigor index, chlorophyll a and carotenoids.
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Claims 6
Claim · model-written summary
PBZ at 8 mg L-1 increased zucchini stem diameter under 4.0 dS m-1 irrigation.
- Taxon
- zucchini
Cucurbita pepo subsp. pepoe0 - Treatment
- 8 mg L-1 PBZe0
- Outcome
- stem diametere0
- Direction
- increasese0
- Setting
- irrigation of 4.0 dS m-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 8 mg L-1 PBZ increases stem diameter in zucchini under irrigation of 4.0 dS m-1.”
Claim · model-written summary
PBZ at 4 mg L-1 increased chlorophyll b and total chlorophyll under low-salinity irrigation.
- Taxon
- Zucchini cultivationt0
- Treatment
- PBZ concentration of 4 mg L-1e0
- Outcome
- Chlorophyll b and total chlorophyll contentse0
- Direction
- increasee0
- Setting
- irrigation of 0.6 dS m-1e0
Not reportedComparator
Verbatim
e0“Chlorophyll b and total chlorophyll contents increase with PBZ concentration of 4 mg L-1 and irrigation of 0.6 dS m-1.”
t0“Zucchini cultivation”
Claim · model-written summary
PBZ at 4 mg L-1 increased relative water content under 4.0 dS m-1 salinity.
- Taxon
- zucchiniCucurbita pepo subsp. pepoe0
- Treatment
- PBZ concentration of 4 mg L-1e0
- Outcome
- relative water contente0
- Direction
- increasese0
- Setting
- 4.0e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ concentration of 4 mg L-1 increases the relative water content while reducing electrolyte leakage in zucchini under salinities of 4.0 and 0.6 dS m-1 respectively.”
Claim · model-written summary
PBZ at 4 mg L-1 reduced electrolyte leakage under 0.6 dS m-1 salinity.
- Taxon
- zucchiniCucurbita pepo subsp. pepoe0
- Treatment
- PBZ concentration of 4 mg L-1e0
- Outcome
- electrolyte leakagee0
- Direction
- reducinge0
- Setting
- 0.6 dS m-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ concentration of 4 mg L-1 increases the relative water content while reducing electrolyte leakage in zucchini under salinities of 4.0 and 0.6 dS m-1 respectively.”
Claim · model-written summary
PBZ at 8 mg L-1 increased root, stem and leaf dry mass under 0.6 dS m-1 irrigation.
- Taxon
- zucchiniCucurbita pepo subsp. pepoe0
- Treatment
- PBZ concentration of 8 mg L-1e0
- Outcome
- Root, stem and leaf dry masse0
- Direction
- increasese0
- Setting
- water of 0.6 dS m-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root, stem and leaf dry mass of zucchini increases when plants are irrigated with water of 0.6 dS m-1 and subjected to PBZ concentration of 8 mg L-1.”
Claim · model-written summary
PBZ did not attenuate salinity effects on leaf area, crown traits, vegetative vigor, chlorophyll a or carotenoids.
- Taxon
- ZucchiniCucurbita pepo subsp. pepot0
- Treatment
- PBZ concentrationse0
- Outcome
- leaf area, crown volume and diameter, vegetative vigor indexe0
- Direction
- do not attenuatee0
- Qualifier
- chlorophyll a and carotenoidse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ concentrations do not attenuate the effects of salinity on leaf area, crown volume and diameter, vegetative vigor index, chlorophyll a and carotenoids.”
t0“Zucchini”
The same questions in other papers
paclobutrazol · growth · Cucurbita pepoPositive and negative results
1 in the opposite direction
- 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.