Abstract
Abstract Water stress negatively impacts plant morphology and physiology by inducing metabolic oxidative stress, which leads to cellular damage. Applying nutrients and/or organic molecules, such as amino acids, may mitigate the effects of drought stress. In the present study, the effects of a protective foliar complex (PFC) on late‐harvest sugarcane ( Saccharum spp L.) (dry season) were evaluated. Four field experiments were carried out in commercial areas of sugarcane production in the central‐south region of Brazil using sugarcane variety CTC4: in the fourth and second ratoons in 2019 and in the fifth and third ratoons in 2020. The treatments consisted of foliar application or no application of the PFC at the beginning of the dry period in June. The PFC was applied at a dose of 10 L ha −1 in a water volume of 100 L ha −1 . PFC application increased the activities of antioxidant enzymes (superoxide dismutase, peroxidase, and catalase) in sugarcane leaves. PFC application also reduced leaf levels of malondialdehyde and hydrogen peroxide (H 2 O 2 ). On average, PFC application increased sucrose accumulation by 2.26 and 1.74 Mg ha −1 in 2019 and 2020, respectively, indicating improved raw material quality. In addition, PFC application mitigated damage caused by drought, with average increases in stalk productivity of 10.7 and 7.6 Mg ha −1 in 2019 and 2020, respectively. The positive effects of PFC application on plant antioxidant enzymes enabled greater biomass accumulation and, in turn, higher energy cogeneration.
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Claims 7
Claim · model-written summary
PFC increased activities of three antioxidant enzymes in sugarcane leaves.
- Taxon
- sugarcanee0
- Organ / stage
- leavese0
- Treatment
- PFC applicatione0
- Outcome
- activities of antioxidant enzymes (superoxide dismutase, peroxidase, and catalase)e0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“PFC application increased the activities of antioxidant enzymes (superoxide dismutase, peroxidase, and catalase) in sugarcane leaves”
Claim · model-written summary
PFC reduced leaf malondialdehyde and hydrogen peroxide levels.
- Taxon
- sugarcanet0
- Organ / stage
- leafe0
- Treatment
- PFC applicatione0
- Outcome
- leaf levels of malondialdehyde and hydrogen peroxide (H 2 O 2 )e0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“PFC application also reduced leaf levels of malondialdehyde and hydrogen peroxide (H 2 O 2 )”
t0“sugarcane”
Claim · model-written summary
PFC increased sucrose accumulation by 2.26 Mg ha −1 in 2019.
- Taxon
- sugarcanet0
- Treatment
- PFC applicatione0
- Outcome
- sucrose accumulatione0
- Direction
- increasede0
- Value
- 2.26e0
- Qualifier
- 2019e0
Not reportedComparator
Verbatim
e0“On average, PFC application increased sucrose accumulation by 2.26 and 1.74 Mg ha −1 in 2019 and 2020, respectively”
t0“sugarcane”
Claim · model-written summary
PFC increased sucrose accumulation by 1.74 Mg ha −1 in 2020.
- Taxon
- sugarcanet0
- Treatment
- PFC applicatione0
- Outcome
- sucrose accumulatione0
- Direction
- increasede0
- Value
- 1.74 Mg ha −1e0
- Qualifier
- 2020e0
Not reportedComparator
Verbatim
e0“On average, PFC application increased sucrose accumulation by 2.26 and 1.74 Mg ha −1 in 2019 and 2020, respectively”
t0“sugarcane”
Claim · model-written summary
PFC increased stalk productivity by 10.7 Mg ha −1 in 2019.
- Taxon
- sugarcanet0
- Treatment
- PFC applicatione0
- Outcome
- stalk productivitye0
- Direction
- increasese0
- Value
- 10.7e0
- Qualifier
- 2019e0
Not reportedComparator
Verbatim
e0“PFC application mitigated damage caused by drought, with average increases in stalk productivity of 10.7 and 7.6 Mg ha −1 in 2019 and 2020, respectively”
t0“sugarcane”
Claim · model-written summary
PFC increased stalk productivity by 7.6 Mg ha −1 in 2020.
- Taxon
- sugarcanet0
- Treatment
- PFC applicatione0
- Outcome
- stalk productivitye0
- Direction
- increasese0
- Value
- 7.6 Mg ha −1e0
- Qualifier
- 2020e0
Not reportedComparator
Verbatim
e0“PFC application mitigated damage caused by drought, with average increases in stalk productivity of 10.7 and 7.6 Mg ha −1 in 2019 and 2020, respectively”
t0“sugarcane”
Claim · model-written summary
PFC-enhanced antioxidant enzymes enabled greater biomass accumulation and higher energy cogeneration.
Verbatim
e0“The positive effects of PFC application on plant antioxidant enzymes enabled greater biomass accumulation and, in turn, higher energy cogeneration”
t0“sugarcane”
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