Abstract
Glyphosate (GP)-based herbicides have been widely applied to crops for weed control and pre-harvest desiccation. The objective of this research was to evaluate the effects of pre-harvest GP application on maize or how it physiologically alters this crop. Here, we applied four GP treatment (Control, GP150, GP200, and GP250) on maize lines of Z58 and PH6WC belonging to different maturity groups at grain-filling stages form DAP30 to DAP45. GP application significantly decreased the grain moisture content at harvest by 22-35% for Z58 and by 15-41% for PH6WC. However, the responses of grain weight to glyphosate vary with inbred lines and application time. A high concentration of glyphosate (GP250) reduced the grain weight of Z58 and low concentrations (GP150 and GP200) did not affect, while the grain weight of PH6WC significantly decreased under glyphosate treatment. In summary, our results revealed that timely and appropriate GP application lowers grain moisture content without causing seed yield and quality loss. GP application adversely affected photosynthesis by promoting maturation and leaf senescence. Meanwhile, it also enhanced non-structural carbohydrate (soluble sugars and starch) remobilization from the vegetative organs to the grains. Hence, GP treatment coordinates plant senescence and assimilate remobilization. RNA sequencing revealed that glyphosate regulated the transcript levels of sugar signaling-related genes and induced assimilate repartitioning in grains. This work indicates the practical significance of GP application for maize seed production and harvest, which highlights the contributions of source-sink communication to maize yield in response to external stress or pre-harvest desiccant application.
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Claims 12
Claim · model-written summary
Glyphosate lowered harvest grain moisture in Z58 by 22-35%.
- Material
- Z58e0
- Treatment
- GP applicatione0
- Outcome
- grain moisture content at harveste0
- Direction
- decreasede0
- Value
- 22-35%e0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GP application significantly decreased the grain moisture content at harvest by 22-35% for Z58”
t0“Maize”
Claim · model-written summary
Glyphosate lowered harvest grain moisture in PH6WC by 15-41%.
- Material
- PH6WCe0
- Treatment
- Glyphosatet0
- Outcome
- Grain Moisture Content at Harvestt0
- Direction
- Lowerst0
- Value
- 15-41%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and by 15-41% for PH6WC”
t0“Glyphosate Application at Post-anthesis Lowers Grain Moisture Content at Harvest and Reallocates Non-structural Carbohydrates in Maize”
Claim · model-written summary
GP250 reduced Z58 grain weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high concentration of glyphosate (GP250) reduced the grain weight of Z58”
t0“Maize”
Claim · model-written summary
GP150 did not affect Z58 grain weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low concentrations (GP150 and GP200) did not affect”
t0“Grain Moisture Content at Harvest and Reallocates Non-structural Carbohydrates in Maize”
e1“GP application significantly decreased the grain moisture content at harvest by 22-35% for Z58”
e2“A high concentration of glyphosate (GP250) reduced the grain weight of Z58”
Claim · model-written summary
GP200 did not affect Z58 grain weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low concentrations (GP150 and GP200) did not affect”
t0“Grain Moisture Content at Harvest and Reallocates Non-structural Carbohydrates in Maize”
e1“GP application significantly decreased the grain moisture content at harvest by 22-35% for Z58”
e2“A high concentration of glyphosate (GP250) reduced the grain weight of Z58”
Claim · model-written summary
Glyphosate significantly decreased PH6WC grain weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the grain weight of PH6WC significantly decreased under glyphosate treatment”
t0“Maize”
Claim · model-written summary
Timely appropriate GP application lowered grain moisture without seed yield or quality loss.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“timely and appropriate GP application lowers grain moisture content without causing seed yield and quality loss”
t0“Maize”
Claim · model-written summary
GP application adversely affected photosynthesis.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GP application adversely affected photosynthesis by promoting maturation and leaf senescence”
t0“Maize”
Claim · model-written summary
GP promoted maturation and leaf senescence.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GP application adversely affected photosynthesis by promoting maturation and leaf senescence”
t0“Maize”
Claim · model-written summary
GP enhanced remobilization of soluble sugars and starch to grains.
- Organ / stage
- vegetative organse0
- Treatment
- GP applicatione1
- Outcome
- non-structural carbohydrate (soluble sugars and starch) remobilizatione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it also enhanced non-structural carbohydrate (soluble sugars and starch) remobilization from the vegetative organs to the grains”
t0“Glyphosate Application at Post-anthesis Lowers Grain Moisture Content at Harvest and Reallocates Non-structural Carbohydrates in Maize”
e1“GP application significantly decreased the grain moisture content at harvest by 22-35% for Z58”
Claim · model-written summary
Glyphosate regulated transcript levels of sugar signaling genes.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glyphosate regulated the transcript levels of sugar signaling-related genes”
t0“Maize”
Claim · model-written summary
Glyphosate induced assimilate repartitioning in grains.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glyphosate regulated the transcript levels of sugar signaling-related genes and induced assimilate repartitioning in grains”
t0“Maize”
The same questions in other papers
glyphosate · yield · Zea mays (maize)Results differ
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See all 77 papers →glyphosate · quality: grain · Zea mays (maize)Results agree
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glyphosate · physiology: photosynthesis · Zea mays (maize)Results agree
4 papers in the same direction as this paper
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- negative
- no effect
1 paper more in this group
See all 5 papers →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.