Abstract
Paclobutrazol was sprayed at 0, 150, and 300 mg L−1 during the closed canopy stage and the early bud stage with two high-yielding cultivars of rapeseed, Yangguang 2009 and Fengyou 520. The impact of paclobutrazol on the accumulation and distribution of biomass and its relationship with yield, resistance to lodging and pod shattering were determined. All the treatments increased the resistance as well as yield. The maximum yield was obtained when paclobutrazol was applied during the closed canopy stage at 150 mg L−1. The plant's resistance to both lodging and pod shattering was the maximum when paclobutrazol was applied during the early bud stage at 300 mg L−1. Paclobutrazol also delayed senescence, with the higher concentration or later spraying leading to more obvious effects; improved the net assimilation rate before the early bud stage; and promoted the relative growth rate of the main growth organ at each stage of growth and maximized the rate and quantities of biomass accumulation. However, at the higher concentration and later spraying, the increments were smaller. The spraying also increased the rates of biomass allocation to roots, leaves, and pods, but the rate of allocation to stems decreased as the plants grew shorter. The higher allocation to roots and the lower allocation to stems favoured resistance to both lodging and pod shattering whereas higher allocation to leaves and pods favoured yield. The higher concentration or late spraying led to excessive biomass being allocated to roots, which decreased leaf biomass during the bud stage, leading to greater resistance but lower yields.
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Claims 11
Claim · model-written summary
All paclobutrazol treatments increased lodging and pod shattering resistance and yield.
- Taxon
- Brassica napus L.
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- treatmentse0
- Outcome
- resistance as well as yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“All the treatments increased the resistance as well as yield.”
t0“Brassica napus L.”
Claim · model-written summary
150 mg L−1 at closed canopy gave maximum yield.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- paclobutrazol was applied during the closed canopy stage at 150 mg L−1e0
- Outcome
- yielde0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum yield was obtained when paclobutrazol was applied during the closed canopy stage at 150 mg L−1.”
t0“Brassica napus L.”
Claim · model-written summary
300 mg L−1 at early bud gave maximum lodging and pod shattering resistance.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- paclobutrazol was applied during the early bud stage at 300 mg L−1e0
- Outcome
- resistance to both lodging and pod shatteringe0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plant's resistance to both lodging and pod shattering was the maximum when paclobutrazol was applied during the early bud stage at 300 mg L−1.”
t0“Brassica napus L.”
Claim · model-written summary
Paclobutrazol delayed senescence, especially at higher dose or later spraying.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- Paclobutrazole0
- Outcome
- senescencee0
- Direction
- delayede0
- Qualifier
- higher concentration or later sprayinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Paclobutrazol also delayed senescence, with the higher concentration or later spraying leading to more obvious effects”
t0“Brassica napus L.”
Claim · model-written summary
Paclobutrazol improved net assimilation before early bud.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- Paclobutrazole0
- Outcome
- net assimilation ratee0
- Direction
- improvede0
- Qualifier
- before the early bud stagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Paclobutrazol also delayed senescence, with the higher concentration or later spraying leading to more obvious effects; improved the net assimilation rate before the early bud stage”
t0“Brassica napus L.”
Claim · model-written summary
Paclobutrazol promoted relative growth rate and biomass accumulation.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- Paclobutrazole0
- Outcome
- relative growth rate of the main growth organe0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Paclobutrazol also delayed senescence, with the higher concentration or later spraying leading to more obvious effects; improved the net assimilation rate before the early bud stage; and promoted the relative growth rate of the main growth organ at each stage of growth and maximized the rate and quantities of biomass accumulation.”
t0“Brassica napus L.”
Claim · model-written summary
Spraying increased biomass allocation to roots, leaves, and pods.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- sprayinge0
- Outcome
- rates of biomass allocation to roots, leaves, and podse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The spraying also increased the rates of biomass allocation to roots, leaves, and pods”
t0“Brassica napus L.”
Claim · model-written summary
Spraying decreased biomass allocation to stems as plants shortened.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- sprayinge0
- Outcome
- rate of allocation to stemse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The spraying also increased the rates of biomass allocation to roots, leaves, and pods, but the rate of allocation to stems decreased as the plants grew shorter.”
t0“Brassica napus L.”
Claim · model-written summary
Higher root and lower stem allocation favored lodging and shattering resistance.
- Taxon
- Brassica napus L.Brassica napust0
- Organ / stage
- rootse0
- Outcome
- resistance to both lodging and pod shatteringe0
- Direction
- favourede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher allocation to roots and the lower allocation to stems favoured resistance to both lodging and pod shattering”
t0“Brassica napus L.”
Claim · model-written summary
Higher leaf and pod allocation favored yield.
- Taxon
- Brassica napus L.Brassica napust0
- Organ / stage
- leaves and podse0
- Outcome
- yielde0
- Direction
- favourede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher allocation to leaves and pods favoured yield.”
t0“Brassica napus L.”
Claim · model-written summary
Higher dose or later spraying increased root biomass allocation and resistance but lowered yield.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- higher concentration or late sprayinge0
- Outcome
- lower yieldse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher concentration or late spraying led to excessive biomass being allocated to roots, which decreased leaf biomass during the bud stage, leading to greater resistance but lower yields.”
t0“Brassica napus L.”
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See all 93 papers →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.