Herbicide-Tolerant Crops
Development of crops that can tolerate specific herbicides, allowing for more effective weed control and reduced manual labor.
What is Herbicide-Tolerant Crops?
Crops that have been genetically modified to withstand the effects of specific herbicides, allowing for selective weed control.
Key points
- Define herbicide-tolerant crops.
- Explain the genetic basis of herbicide tolerance.
- Describe the advantages and disadvantages of using herbicide-tolerant crops.
- Identify common herbicides used with these crops.
Common exam trap
Confusing herbicide tolerance with insect resistance (e.g., Bt crops).
Definitions
- Term
Herbicide-Tolerant (HT) Crops
- Meaning
Crops that have been genetically modified to withstand the effects of specific herbicides, allowing for selective weed control.
- Term
Glyphosate
- Meaning
A broad-spectrum systemic herbicide used to kill weeds. HT crops are engineered to tolerate its application.
- Term
Glufosinate
- Meaning
Another broad-spectrum herbicide. HT crops can be engineered to resist its effects, often via the 'bar' gene.
- Term
Genetic Engineering
- Meaning
The direct manipulation of an organism's genes using biotechnology.
Learning objectives
Define herbicide-tolerant crops.
Explain the genetic basis of herbicide tolerance.
Describe the advantages and disadvantages of using herbicide-tolerant crops.
Identify common herbicides used with these crops.
Understand the agricultural and environmental implications.
Prerequisites
Basic understanding of plant biology and genetics.
Knowledge of agricultural practices.
Familiarity with biotechnology and genetic engineering concepts.
Common mistakes
Confusing herbicide tolerance with insect resistance (e.g., Bt crops).
Assuming all genetically modified crops are herbicide-tolerant.
Overlooking the potential for weed resistance development.
Not understanding the specific herbicide a particular HT crop is tolerant to.
Keywords
Herbicide tolerance
Genetic modification
Biotechnology
Weed control
Glyphosate
Glufosinate
Agriculture
GM crops
bar gene
Practice preview
Which of the following is a common example of a herbicide-tolerant crop developed through genetic engineering?…
easy
The primary advantage of herbicide-tolerant crops for farmers is:…
easy
Which gene is often introduced into crops to confer tolerance to glyphosate-based herbicides like Roundup?…
easy