Ethylene Hormone in Plants

What is the role of ethylene hormone in fruit ripening?

• Ethylene inhibits fruit ripening by blocking enzymatic reactions.

• Ethylene delays fruit ripening by reducing sugar content.

• Ethylene promotes fruit ripening by initiating various biochemical changes.

• Ethylene has no impact on fruit ripening.

How does ethylene hormone affect plant growth?

• Ethylene hormone has no impact on plant growth

• Ethylene hormone affects plant growth by promoting fruit ripening, leaf abscission, flower wilting, root and stem growth, and seed germination.

• Ethylene hormone causes excessive leaf growth in plants

• Ethylene hormone inhibits seed germination in plants

Explain the regulation of senescence by ethylene hormone.

• Ethylene inhibits chlorophyll breakdown and gene expression related to senescence.

• Ethylene delays the onset of senescence.

• Ethylene has no effect on senescence regulation.

• Ethylene promotes chlorophyll breakdown and gene expression related to senescence.

Discuss the interaction of ethylene hormone with other hormones in plants.

• Ethylene completely suppresses the effects of other hormones in plants

• Ethylene interacts with other hormones through crosstalk mechanisms, enhancing or inhibiting their effects.

• Ethylene has no interaction with other hormones in plants

• Ethylene only interacts with one specific hormone in plants

What are the environmental factors that affect the production of ethylene hormone in plants?

• Temperature, light, water availability, stress conditions

• Altitude, soil type, plant species

• Nutrient availability, plant age, pollination

• Soil pH, wind speed, humidity levels

What are some commercial applications of ethylene hormone in agriculture?

• Fruit ripening, flower induction, stress response regulation

• Water conservation, disease prevention, pollination enhancement

How does ethylene hormone influence the abscission of plant parts?

• Ethylene directly causes the fusion of plant parts instead of abscission.

• Ethylene has no effect on the abscission of plant parts.

• Ethylene promotes the production of enzymes that break down cell walls in the abscission zone.

• Ethylene inhibits the production of enzymes that break down cell walls in the abscission zone.

Describe the role of ethylene hormone in leaf senescence.

• Ethylene inhibits leaf senescence by promoting chlorophyll production.

• Ethylene has no impact on leaf senescence.

• Ethylene promotes leaf senescence by triggering chlorophyll breakdown.

• Ethylene delays leaf senescence by enhancing nutrient absorption.

What are the effects of ethylene hormone on seed germination?

• Ethylene has no effect on seed germination

• Ethylene delays seed germination by suppressing enzyme activity

• Ethylene inhibits seed germination by reducing water uptake

• Ethylene promotes seed germination by breaking seed dormancy, stimulating the production of hydrolytic enzymes, and enhancing gibberellin synthesis.

Explain the mechanism of ethylene hormone signaling in plants.

• The mechanism of ethylene hormone signaling in plants involves ethylene binding to receptor proteins on the endoplasmic reticulum membrane, initiating a signaling cascade that alters gene expression and physiological responses.

• Ethylene hormone signaling in plants involves direct interaction with chloroplasts

• The mechanism of ethylene hormone signaling is mediated by auxins

• Ethylene hormone signaling primarily affects animal cells