Abstract
Seed potato tubers planted immediately after harvest is characterized by delayed plant emergence, poor establishment and low yields. Gibberellic acid (GA) and Benzylaminopurine (BA) or their combinations cause dormancy breakage though little information is available on their combined application to dormancy termination. The effects of foliar application of GA and BA on potato tuber sprouting and subsequent yield were studied. Three potato varieties with different tuber dormancy period; ‘Asante’ (short dormancy), Dutch Robyjn (medium dormancy) and ‘Kenya Sifa’ (long dormancy) were planted at National Potato Research Centre, Tigoni and sprayed with a factorial combinations of 0, 50, 100, 300 ppm GA and 0, 50, 75, 100 ppm BA separately and combined at the rate of 1000 lts/ha spray volume towards the end of maturation. The resulting tubers were put in diffuse light storage (DLS) and data on number, length and vigour of sprouts recorded. Sprouted seed tubers were subsequently planted and evaluated for both growth characteristics and yields. The data collected was subjected to analysis of variance and significantly different means were separated using Fisher’s protected least significant difference at p≤0.05. Higher rates of foliar application of GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber, sprout vigour (score), and % sprouting from 3.24 to 7.02 and 3.84 to 9.03, 2.04 to 4.45 and 2.07 to 4.8, 1.7 to 3.06 and 1.63 to 3.23, 61.21to 86.67and 63.3 to 83.7 in Asante, 2.94 to 8.03 and 2.8 to 7.99, 1.84 to 5.24 and 1.87 to 4.76, 1.3 to 3.0 and 1.27 to 2.63, 50.61 to 92.7 and 52.7 to 85.7in Dutch Robyjn and 0.79 to 6.43 and 1.32 to 6.99, 0.61 to 3.49 and 0.79 to 3.33, 0.61 to 3.03 and 0.73 to 2.83, 22.12 to 85.76 and 28.3 to83.7 in Kenya Sifa after storage in 2008 and 2009 respectively. A combination of BA and GA resulted in significantly more growth than using only GA or BA alone at the same level. Similarly the subsequent tuber numbers per plant and yield (tons/ha) in resultant plants increased from 7.13 to 12.53 and 24.66 to 32.27, 6.93 to 10.47 and 16.73 to 23.37, and 5.63 to 9.6 and 17.53 to 30.13 in Asante, Dutch Robyjnand Kenya Sifa respectively. Combined application of GA + BA at varied rates can be used to improve sprouting characteristics of seed potato and yield of resultant plants.
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Claims 20
Claim · model-written summary
The highest combined GA and BA rate increased sprout length in Asante in 2008 and 2009.
- Taxon
- Potato
Solanum tuberosumt0 - Material
- Asantee2
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- sprout length (cm)e0
- Direction
- increasee0
- Value
- 3.24 to 7.02 and 3.84 to 9.03e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm)”
e1“from 3.24 to 7.02 and 3.84 to 9.03”
e2“‘Asante’ (short dormancy)”
Claim · model-written summary
The highest combined GA and BA rate increased sprouts per tuber in Asante in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Asantee2
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- number of sprout/tubere0
- Direction
- increasee0
- Value
- 2.04 to 4.45 and 2.07 to 4.8e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber”
e1“2.04 to 4.45 and 2.07 to 4.8”
e2“‘Asante’ (short dormancy)”
Claim · model-written summary
The highest combined GA and BA rate increased sprout vigour in Asante in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Asantee2
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- sprout vigour (score)e0
- Direction
- increasee0
- Value
- 1.7 to 3.06 and 1.63 to 3.23e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber, sprout vigour (score)”
e1“1.7 to 3.06 and 1.63 to 3.23”
e2“‘Asante’ (short dormancy)”
Claim · model-written summary
The highest combined GA and BA rate increased sprouting percentage in Asante in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Asantee1
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- % sproutinge0
- Direction
- increasee0
- Value
- 61.21to 86.67and 63.3 to 83.7e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber, sprout vigour (score), and % sprouting”
e1“61.21to 86.67and 63.3 to 83.7 in Asante”
Claim · model-written summary
The highest combined GA and BA rate increased sprout length in Dutch Robyjn in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Dutch Robyjne2
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- sprout length (cm)e0
- Direction
- increasee0
- Value
- 2.94 to 8.03 and 2.8 to 7.99e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm)”
e1“2.94 to 8.03 and 2.8 to 7.99”
e2“Dutch Robyjn (medium dormancy)”
Claim · model-written summary
The highest combined GA and BA rate increased sprouts per tuber in Dutch Robyjn in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Dutch Robyjne2
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- number of sprout/tubere0
- Direction
- increasee0
- Value
- 1.84 to 5.24 and 1.87 to 4.76e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber”
e1“1.84 to 5.24 and 1.87 to 4.76”
e2“Dutch Robyjn (medium dormancy)”
Claim · model-written summary
The highest combined GA and BA rate increased sprout vigour in Dutch Robyjn in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Dutch Robyjne2
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- sprout vigour (score)e0
- Direction
- increasee0
- Value
- 1.3 to 3.0 and 1.27 to 2.63e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber, sprout vigour (score)”
e1“1.3 to 3.0 and 1.27 to 2.63”
e2“Dutch Robyjn (medium dormancy)”
Claim · model-written summary
The highest combined GA and BA rate increased sprouting percentage in Dutch Robyjn in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Dutch Robyjne1
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- % sproutinge0
- Direction
- increasee0
- Value
- 50.61 to 92.7 and 52.7 to 85.7e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber, sprout vigour (score), and % sprouting”
e1“50.61 to 92.7 and 52.7 to 85.7in Dutch Robyjn”
Claim · model-written summary
The highest combined GA and BA rate increased sprout length in Kenya Sifa in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Kenya Sifae2
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- sprout length (cm)e0
- Direction
- increasee0
- Value
- 0.79 to 6.43 and 1.32 to 6.99e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm)”
e1“0.79 to 6.43 and 1.32 to 6.99”
e2“‘Kenya Sifa’ (long dormancy)”
Claim · model-written summary
The highest combined GA and BA rate increased sprouts per tuber in Kenya Sifa in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Kenya Sifae2
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- number of sprout/tubere0
- Direction
- increasee0
- Value
- 0.61 to 3.49 and 0.79 to 3.33e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber”
e1“0.61 to 3.49 and 0.79 to 3.33”
e2“‘Kenya Sifa’ (long dormancy)”
Claim · model-written summary
The highest combined GA and BA rate increased sprout vigour in Kenya Sifa in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Kenya Sifae2
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- sprout vigour (score)e0
- Direction
- increasee0
- Value
- 0.61 to 3.03 and 0.73 to 2.83e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber, sprout vigour (score)”
e1“0.61 to 3.03 and 0.73 to 2.83”
e2“‘Kenya Sifa’ (long dormancy)”
Claim · model-written summary
The highest combined GA and BA rate increased sprouting percentage in Kenya Sifa in 2008 and 2009.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Kenya Sifae1
- Treatment
- GA+BA (300 ppm + 100 ppm)e0
- Outcome
- % sproutinge0
- Direction
- increasee0
- Value
- 22.12 to 85.76 and 28.3 to83.7e1
- Comparator
- control (0 + 0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“GA+BA (300 ppm + 100 ppm) compared with the control (0 + 0) resulted in significant increase insprout length (cm), number of sprout/tuber, sprout vigour (score), and % sprouting”
e1“22.12 to 85.76 and 28.3 to83.7 in Kenya Sifa”
Claim · model-written summary
The combination of BA and GA produced significantly more growth than either alone at the same level.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- combination of BA and GAe0
- Outcome
- growthe0
- Direction
- moree0
- Comparator
- only GA or BA alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“A combination of BA and GA resulted in significantly more growth than using only GA or BA alone at the same level”
Claim · model-written summary
Tuber number per plant increased from 7.13 to 12.53 in Asante.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Asantee1
- Treatment
- GA + BAe2
- Outcome
- tuber numbers per plante0
- Direction
- increasede0
- Value
- 7.13 to 12.53e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“subsequent tuber numbers per plant and yield (tons/ha) in resultant plants increased from 7.13 to 12.53 and 24.66 to 32.27”
e1“in Asante, Dutch Robyjnand Kenya Sifa respectively”
e2“Combined application of GA + BA”
Claim · model-written summary
Tuber yield increased from 24.66 to 32.27 tons/ha in Asante.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Asantee1
- Treatment
- GA + BAe2
- Outcome
- yield (tons/ha)e0
- Direction
- increasede0
- Value
- 24.66 to 32.27e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“yield (tons/ha) in resultant plants increased from 7.13 to 12.53 and 24.66 to 32.27”
e1“in Asante, Dutch Robyjnand Kenya Sifa respectively”
e2“Combined application of GA + BA”
Claim · model-written summary
Tuber number per plant increased from 6.93 to 10.47 in Dutch Robyjn.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Dutch Robyjne2
- Treatment
- GA + BAe3
- Outcome
- tuber numbers per plante0
- Direction
- increasede0
- Value
- 6.93 to 10.47e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“subsequent tuber numbers per plant and yield (tons/ha) in resultant plants increased”
e1“6.93 to 10.47 and 16.73 to 23.37”
e2“in Asante, Dutch Robyjnand Kenya Sifa respectively”
e3“Combined application of GA + BA”
Claim · model-written summary
Tuber yield increased from 16.73 to 23.37 tons/ha in Dutch Robyjn.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Dutch Robyjne2
- Treatment
- GA + BAe3
- Outcome
- yield (tons/ha)e0
- Direction
- increasede0
- Value
- 16.73 to 23.37e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“yield (tons/ha) in resultant plants increased”
e1“6.93 to 10.47 and 16.73 to 23.37”
e2“in Asante, Dutch Robyjnand Kenya Sifa respectively”
e3“Combined application of GA + BA”
Claim · model-written summary
Tuber number per plant increased from 5.63 to 9.6 in Kenya Sifa.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Kenya Sifae2
- Treatment
- GA + BAe3
- Outcome
- tuber numbers per plante0
- Direction
- increasede0
- Value
- 5.63 to 9.6e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“subsequent tuber numbers per plant and yield (tons/ha) in resultant plants increased”
e1“5.63 to 9.6 and 17.53 to 30.13”
e2“in Asante, Dutch Robyjnand Kenya Sifa respectively”
e3“Combined application of GA + BA”
Claim · model-written summary
Tuber yield increased from 17.53 to 30.13 tons/ha in Kenya Sifa.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Kenya Sifae2
- Treatment
- GA + BAe3
- Outcome
- yield (tons/ha)e0
- Direction
- increasede0
- Value
- 17.53 to 30.13e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“yield (tons/ha) in resultant plants increased”
e1“5.63 to 9.6 and 17.53 to 30.13”
e2“in Asante, Dutch Robyjnand Kenya Sifa respectively”
e3“Combined application of GA + BA”
Claim · model-written summary
The authors recommend combined GA and BA application to improve seed potato sprouting and resultant plant yield.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- GA + BAe0
- Outcome
- improve sprouting characteristics of seed potato and yield of resultant plantse0
- Direction
- improvee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seed Potato Tuber”
e0“Combined application of GA + BA at varied rates can be used to improve sprouting characteristics of seed potato and yield of resultant plants”
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