Abstract
Abstract The growth responses of potato ( Solanum tuberosum ) to leaf and soil applied paclobutrazol (PBZ) under the hot tropical climate of eastern Ethiopia was investigated in two field experiments. A month after planting, PBZ was applied as a foliar spray or soil drench at rates of 0, 2, 3, and 4 kg active ingredient (a.i.) PBZ/ha. A randomised complete block design with three replications was used. Regardless of the method of application, PBZ increased chlorophyll a and b content and net photosynthesis of the leaf tissue, but reduced shoot growth, plant height, stomatal conductance, and rates of transpiration compared with the control. PBZ significantly delayed the onset of leaf senescence and increased the partitioning of assimilates to the tubers while reducing assimilate supply to the leaves, stems, roots, and stolons. PBZ improved the productivity of potatoes grown in a hot tropical climate by reducing shoot growth, increasing leaf chlorophyll content, enhancing the rate of photosynthesis, improving water use, and modifying partitioning of dry matter to the tuber.
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Claims 8
Claim · model-written summary
Paclobutrazol increased potato leaf chlorophyll a and b content and net photosynthesis.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- PBZe0
- Outcome
- chlorophyll a and b content and net photosynthesise0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ increased chlorophyll a and b content and net photosynthesis of the leaf tissue, but reduced shoot growth, plant height, stomatal conductance, and rates of transpiration compared with the control”
t0“potato”
Claim · model-written summary
Paclobutrazol reduced potato shoot growth and height compared with control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- PBZe0
- Outcome
- shoot growth, plant heighte0
- Direction
- reducede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ increased chlorophyll a and b content and net photosynthesis of the leaf tissue, but reduced shoot growth, plant height, stomatal conductance, and rates of transpiration compared with the control”
t0“potato”
Claim · model-written summary
Paclobutrazol reduced potato stomatal conductance and transpiration compared with control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- PBZe0
- Outcome
- stomatal conductance, and rates of transpiratione0
- Direction
- reducede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ increased chlorophyll a and b content and net photosynthesis of the leaf tissue, but reduced shoot growth, plant height, stomatal conductance, and rates of transpiration compared with the control”
t0“potato”
Claim · model-written summary
Paclobutrazol significantly delayed potato leaf senescence.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- leafe0
- Treatment
- PBZe0
- Outcome
- onset of leaf senescencee0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ significantly delayed the onset of leaf senescence”
t0“potato”
Claim · model-written summary
Paclobutrazol increased allocation of assimilates to potato tubers.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- PBZe0
- Outcome
- partitioning of assimilates to the tuberse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ significantly delayed the onset of leaf senescence and increased the partitioning of assimilates to the tubers”
t0“potato”
Claim · model-written summary
Paclobutrazol reduced assimilate supply to leaves, stems, and roots.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- assimilate supply to the leaves, stems, rootse0
- Direction
- reducinge0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing assimilate supply to the leaves, stems, roots, and stolons”
t0“potato”
Claim · model-written summary
Paclobutrazol reduced assimilate supply to stolons.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- PBZe0
- Outcome
- assimilate supply to the leaves, stems, roots, and stolonse0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ significantly delayed the onset of leaf senescence and increased the partitioning of assimilates to the tubers while reducing assimilate supply to the leaves, stems, roots, and stolons”
t0“potato”
Claim · model-written summary
Paclobutrazol improved potato productivity in a hot tropical climate.
- Taxon
- potatoesSolanum tuberosume0
- Treatment
- PBZe0
- Outcome
- productivity of potatoese0
- Direction
- improvede0
- Qualifier
- hot tropical climatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ improved the productivity of potatoes grown in a hot tropical climate”
The same questions in other papers
paclobutrazol · yield · Solanum tuberosum (potato)Results differ
7 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- positive
- no effect
6 papers more in this group
See all 10 papers →paclobutrazol · physiology: photosynthesis · Solanum tuberosum (potato)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.