Abstract
Herbicide-tolerant sorghum hybrids provide expanded opportunities for chemical weed control; however, herbicide tolerance does not necessarily imply the absence of physiological stress. The present study aimed to evaluate the physiological response of the imazamox-tolerant sorghum hybrid Sentinel IG to increasing doses of the herbicide Pulsar 40 (active ingredient: imazamox). A field experiment was conducted under rainfed conditions during the 2024 growing season in South Central Bulgaria. Net photosynthetic rate (PN), transpiration rate (E), stomatal conductance (gs), and chlorophyll concentration were measured at two time points after herbicide application. In addition, plant height was recorded at key developmental stages. The results demonstrated a clear dose-dependent reduction in chlorophyll concentration, photosynthetic activity, and transpiration intensity with increasing herbicide dose. Although partial recovery of physiological parameters was observed over time, the highest dose (480 ml da⁻¹) resulted in sustained physiological stress and growth suppression. The findings confirm that even herbicide-tolerant sorghum hybrids exhibit measurable physiological responses when exposed to elevated doses of imazamox, highlighting the importance of dose optimization to ensure crop safety under field conditions.
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Claims 7
Claim · model-written summary
Chlorophyll concentration declined as herbicide dose increased.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“a clear dose-dependent reduction in chlorophyll concentration, photosynthetic activity, and transpiration intensity with increasing herbicide dose”
Claim · model-written summary
Photosynthetic activity declined as herbicide dose increased.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“a clear dose-dependent reduction in chlorophyll concentration, photosynthetic activity, and transpiration intensity with increasing herbicide dose”
Claim · model-written summary
Transpiration intensity declined as herbicide dose increased.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“a clear dose-dependent reduction in chlorophyll concentration, photosynthetic activity, and transpiration intensity with increasing herbicide dose”
Claim · model-written summary
Physiological parameters partially recovered over time.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“partial recovery of physiological parameters was observed over time”
Claim · model-written summary
The highest imazamox dose caused sustained physiological stress.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“the highest dose (480 ml da⁻¹) resulted in sustained physiological stress and growth suppression”
Claim · model-written summary
The highest imazamox dose suppressed growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“the highest dose (480 ml da⁻¹) resulted in sustained physiological stress and growth suppression”
Claim · model-written summary
The authors recommend optimizing imazamox dose to ensure crop safety.
- Outcome
- dose optimization to ensure crop safetye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“the importance of dose optimization to ensure crop safety under field conditions”
The same questions in other papers
herbicide · physiology: pigments · SorghumPositive and negative results
1 in the opposite direction
- positive
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.