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Multiple Choice
How do arbuscular mycorrhizal (AM) fungi affect extit{D. lanuginosum} plants grown at high temperatures?
A
They cause disease symptoms in the plants at high temperatures.
B
They inhibit plant growth and reduce heat tolerance.
C
They enhance plant growth and increase heat tolerance.
D
They have no significant effect on plant growth or heat tolerance.
Verified step by step guidance
1
Understand the role of arbuscular mycorrhizal (AM) fungi: AM fungi form symbiotic relationships with plant roots, aiding in nutrient uptake (especially phosphorus) and improving plant stress tolerance, including heat stress.
Analyze the environmental condition: High temperatures can cause stress in plants, potentially leading to reduced growth and survival. AM fungi may help mitigate these effects by enhancing the plant's physiological and biochemical responses.
Examine the relationship between AM fungi and *D. lanuginosum*: Research indicates that AM fungi can enhance the growth and heat tolerance of plants like *D. lanuginosum* by improving water and nutrient absorption and activating stress-response pathways.
Evaluate the options provided: The correct answer aligns with the known benefits of AM fungi, which enhance plant growth and increase heat tolerance, rather than causing disease symptoms or inhibiting growth.
Conclude that AM fungi positively impact *D. lanuginosum* plants grown at high temperatures by enhancing their growth and heat tolerance, as supported by scientific studies on plant-fungi symbiosis.