Abstract
Abstract Background Achieving a synergistic enhancement in both the yield and insect resistance of Bt cotton holds substantial importance for boosting farmers' income and ecological advantages. This study investigated the impact of amino acid foliar fertilizer (AAF) on the yield and Cry1Ac protein (CP) content, providing valuable insights for enhancing its productivity and insect-resistance capabilities. In 2021, Sikang 1 and Sikang 3 were treated with AAF once (A1) and water (CK) during the peak flowering stage. In 2022, AAF was sprayed one (A1), two (A2), and three (A3) times, respectively, with CK serving as the control. Results Compared with the control, the A3 treatment increased seed cotton yield (SCY) by 16.0% and CP by 40.98% at 30 days after flowering. AAF application enhanced soluble protein content (SP) and glutamate pyruvate transaminase (GPT) activity, while suppressing protease and peptidase activities. Concurrently, AAF improved sucrose metabolism through elevated sucrose content and increased activities of sucrose synthase (SS) and sucrose conversion enzyme (SCE), which were also positively correlated with yield. A lower ratio of carbon-to-nitrogen (C/N) was linked to higher yields and CP content. Path analysis confirmed that SP, GPT, SS, and SCE demonstrated positive effects on CP content and SCY, respectively. Peptidase activity had negative effects on CP and SCY. The C/N ratio had negative effects on SCY and CP, respectively. Conclusions Triple foliar application of AAF maintained lower C/N ratios with enhanced carbon metabolism and protein synthesis capacity, thereby simultaneously increasing both Cry1Ac protein content and yield in Bt cotton. These findings provide critical insights for improving both pest resistance and agronomic performance in Bt cotton cultivation.
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Claims 10
Claim · model-written summary
Three foliar applications increased seed cotton yield by 16.0% relative to control.
Verbatim
e0“Compared with the control, the A3 treatment increased seed cotton yield (SCY) by 16.0%”
t0“Bt cotton”
Claim · model-written summary
Three foliar applications increased Cry1Ac protein by 40.98% at 30 days after flowering.
Verbatim
e0“Compared with the control, the A3 treatment increased seed cotton yield (SCY) by 16.0% and CP by 40.98% at 30 days after flowering.”
e1“Cry1Ac protein (CP)”
t0“Bt cotton”
Claim · model-written summary
Amino acid foliar fertilizer enhanced soluble protein content and glutamate pyruvate transaminase activity.
- Taxon
- Bt cottont0
- Treatment
- AAF applicatione0
- Outcome
- soluble protein content (SP) and glutamate pyruvate transaminase (GPT) activitye0
- Direction
- enhancede0
Not reportedComparator
Verbatim
e0“AAF application enhanced soluble protein content (SP) and glutamate pyruvate transaminase (GPT) activity”
t0“Bt cotton”
Claim · model-written summary
Amino acid foliar fertilizer suppressed protease and peptidase activities.
- Taxon
- Bt cottont0
- Treatment
- AAF applicatione0
- Outcome
- protease and peptidase activitiese0
- Direction
- suppressinge0
Not reportedComparator
Verbatim
e0“AAF application enhanced soluble protein content (SP) and glutamate pyruvate transaminase (GPT) activity, while suppressing protease and peptidase activities.”
t0“Bt cotton”
Claim · model-written summary
Amino acid foliar fertilizer elevated sucrose content and sucrose synthase and sucrose conversion enzyme activity.
- Taxon
- Bt cottont0
- Treatment
- AAFe0
- Outcome
- sucrose content and increased activities of sucrose synthase (SS) and sucrose conversion enzyme (SCE)e0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“AAF improved sucrose metabolism through elevated sucrose content and increased activities of sucrose synthase (SS) and sucrose conversion enzyme (SCE)”
t0“Bt cotton”
Claim · model-written summary
Sucrose metabolism indicators were positively correlated with yield.
Verbatim
e0“increased activities of sucrose synthase (SS) and sucrose conversion enzyme (SCE), which were also positively correlated with yield”
t0“Bt cotton”
Claim · model-written summary
A lower carbon to nitrogen ratio was linked to higher yields and Cry1Ac protein content.
Verbatim
e0“A lower ratio of carbon-to-nitrogen (C/N) was linked to higher yields and CP content.”
t0“Bt cotton”
Claim · model-written summary
Path analysis found positive effects of soluble protein, GPT, SS and SCE on Cry1Ac content and seed cotton yield.
Verbatim
e0“Path analysis confirmed that SP, GPT, SS, and SCE demonstrated positive effects on CP content and SCY, respectively.”
t0“Bt cotton”
Claim · model-written summary
Peptidase activity had negative effects on Cry1Ac protein and seed cotton yield.
Verbatim
e0“Peptidase activity had negative effects on CP and SCY.”
t0“Bt cotton”
Claim · model-written summary
Carbon to nitrogen ratio had negative effects on seed cotton yield and Cry1Ac content.
Verbatim
e0“The C/N ratio had negative effects on SCY and CP, respectively.”
t0“Bt cotton”
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