Abstract
Abstract Drought stress is a major limited factor that decreased seed yield and applying micronutrients such as Zinc (Zn), Manganese (Mn) and Boron (B) is considered as agricultural management practices for improving the seed yield, oil content and tolerance under different irrigation conditions. A two-year experiment was carried out as a split-plot arrangement based on a randomized complete block design with three replications during two years (2015–2017). Main plots consisted of three irrigation regimes (Optimal irrigation, cessation of irrigation from flowering, and silique setting stages) and subplots included 10 levels of foliar spray of micronutrients (2, 4, 6 g/L Zn; 2, 4, 6 g/L Mn; 2, 4, 6 g/L B, and the foliar spraying of distilled water as control treatment). Cessation of irrigation led to increase in the activity of Polyphenol oxidase (PPO), Catalase (CAT), Peroxidase (PO), Ascorbate peroxidase (APX), Superoxide dismutase (SOD), Proline (PRO) and Malondialdehyde (MDA) but seed yield (SY) and oil content (OC) decreased. Cessation of irrigation at flowering and silique stages led to a decrease in seed yield by 39.3 and 13.1%, as compared with the optimal irrigation regime, respectively. The interaction of irrigation regime × foliar spray revealed that spraying Zn (4 g/L) and B (4 g/L) maximized the SY (4311.11 kg/ha) under optimal irrigation regime. Under cessation of irrigation from flowering stage, the foliar spray of Mn (6 g/L) produced the highest SY (2862.2 kg/ha) during two tears. Cessation of irrigation at flowering and silique stages caused in decrease OC by 3.3 and 6.5%, respectively. Overall, the foliar spraying of Zn, Mn and B improved the SY and OC of canola under optimal water supply and drought stress regimes.
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Claims 8
Claim · model-written summary
Cessation of irrigation increased the activity of polyphenol oxidase, catalase and peroxidase in canola.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- Cessation of irrigatione1
- Outcome
- Polyphenol oxidase (PPO), Catalase (CAT), Peroxidase (PO)e1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“Canola (Brassica napus L.)”
e1“Cessation of irrigation led to increase in the activity of Polyphenol oxidase (PPO), Catalase (CAT), Peroxidase (PO), Ascorbate peroxidase (APX), Superoxide dismutase (SOD), Proline (PRO) and Malondialdehyde (MDA) but seed yield (SY) and oil content (OC) decreased”
Claim · model-written summary
Cessation of irrigation increased ascorbate peroxidase, superoxide dismutase and proline activity in canola.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- Cessation of irrigatione1
- Outcome
- Ascorbate peroxidase (APX), Superoxide dismutase (SOD), Proline (PRO)e1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canola (Brassica napus L.)”
e1“Cessation of irrigation led to increase in the activity of Polyphenol oxidase (PPO), Catalase (CAT), Peroxidase (PO), Ascorbate peroxidase (APX), Superoxide dismutase (SOD), Proline (PRO) and Malondialdehyde (MDA) but seed yield (SY) and oil content (OC) decreased”
Claim · model-written summary
Cessation of irrigation increased malondialdehyde in canola.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- Cessation of irrigatione1
- Outcome
- Malondialdehyde (MDA)e1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canola (Brassica napus L.)”
e1“Cessation of irrigation led to increase in the activity of Polyphenol oxidase (PPO), Catalase (CAT), Peroxidase (PO), Ascorbate peroxidase (APX), Superoxide dismutase (SOD), Proline (PRO) and Malondialdehyde (MDA) but seed yield (SY) and oil content (OC) decreased”
Claim · model-written summary
Cessation of irrigation at flowering and silique stages decreased canola seed yield by 39.3 and 13.1%.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- Cessation of irrigation at flowering and silique stagese2
- Outcome
- seed yielde2
- Direction
- decreasee2
- Value
- 39.3 and 13.1%e2
- Comparator
- optimal irrigation regimee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canola (Brassica napus L.)”
e2“Cessation of irrigation at flowering and silique stages led to a decrease in seed yield by 39.3 and 13.1%, as compared with the optimal irrigation regime, respectively”
Claim · model-written summary
Cessation of irrigation at flowering and silique stages decreased canola oil content by 3.3 and 6.5%.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- Cessation of irrigation at flowering and silique stagese3
- Outcome
- OCe3
- Direction
- decreasee3
- Value
- 3.3 and 6.5%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canola (Brassica napus L.)”
e3“Cessation of irrigation at flowering and silique stages caused in decrease OC by 3.3 and 6.5%, respectively”
Claim · model-written summary
Spraying Zn (4 g/L) and B (4 g/L) maximized canola seed yield under optimal irrigation.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- spraying Zn (4 g/L) and B (4 g/L)e4
- Outcome
- SYe4
- Direction
- maximizede4
- Value
- 4311.11 kg/hae4
- Qualifier
- under optimal irrigation regimee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canola (Brassica napus L.)”
e4“spraying Zn (4 g/L) and B (4 g/L) maximized the SY (4311.11 kg/ha) under optimal irrigation regime”
Claim · model-written summary
Foliar spraying of Mn (6 g/L) gave the highest canola seed yield under cessation of irrigation from flowering.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- foliar spray of Mn (6 g/L)e5
- Outcome
- SYe5
- Direction
- higheste5
- Value
- 2862.2 kg/hae5
- Qualifier
- Under cessation of irrigation from flowering stagee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canola (Brassica napus L.)”
e5“Under cessation of irrigation from flowering stage, the foliar spray of Mn (6 g/L) produced the highest SY (2862.2 kg/ha) during two tears”
Claim · model-written summary
Foliar spraying of Zn, Mn and B improved canola seed yield and oil content under optimal and drought regimes.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- foliar spraying of Zn, Mn and Be6
- Outcome
- SY and OCe6
- Direction
- improvede6
- Qualifier
- under optimal water supply and drought stress regimese6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Canola (Brassica napus L.)”
e6“Overall, the foliar spraying of Zn, Mn and B improved the SY and OC of canola under optimal water supply and drought stress regimes”
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