Match the observation with the hormone most likely to be its...

Match the observation with the hormone most likely to be its cause. ____________ ethylene ____________ cytokinin ____________ auxin ____________ gibberellin ____________ abscisic acid a. Your cabbage plants bolt (they form elongated flowering stalks) b. The philodendron in your room is leaning toward the window. c. The last of your apples is getting really mushy d. The seeds of your roommate's marijuana plant do not germinate no matter what he does to them. e. Lateral buds on your Ficus plant are sprouting branch shoots.

Match the observation with the hormone most likely to be its cause.
____________ ethylene
____________ cytokinin
____________ auxin
____________ gibberellin
____________ abscisic acid
a. Your cabbage plants bolt (they form elongated flowering stalks)
b. The philodendron in your room is leaning toward the window.
c. The last of your apples is getting really mushy
d. The seeds of your roommate's marijuana plant do not germinate no matter what he does to them.
e. Lateral buds on your Ficus plant are sprouting branch shoots.

Key Concepts

Gibberellin

Hormones that promote stem elongation, seed germination, and flowering. Gibberellins break dormancy and trigger rapid growth responses, influencing processes like bolting in plants.

Abscisic Acid

A hormone that mainly functions in maintaining seed dormancy, regulating stomatal closure, and mediating stress responses. It acts as an inhibitor of growth processes, ensuring seeds and plants do not germinate or grow until favorable conditions are met.

Auxin

A hormone central to regulating cell elongation, apical dominance, and directional growth responses such as phototropism and gravitropism. Auxin distribution in a plant dictates growth patterns and orchestrates organ development.

Plant Hormones

Substances produced in plants that regulate growth, development, and responses to environmental stimuli. They play roles in cell division, elongation, differentiation, and can initiate or inhibit various physiological processes.

Ethylene

A gaseous hormone that influences fruit ripening, senescence, and abscission. It is often responsible for the softening of fruits and is produced in response to stress, leading to accelerated aging or changes in tissue structure.

Cytokinin

A group of hormones that promote cell division and influence shoot initiation and development. Cytokinins regulate lateral bud growth and are vital in balancing the apical dominance exerted by other hormones.

Transcript

00:01 Let's walk through a few scenarios and see if we could determine what hormone is causing this particular scenario.

00:09 So the first one, the last of your apples is getting really mushy.

00:15 This would be the influence of ethylene.

00:21 Ethylene is the most unusual hormone because it is a gas.

00:28 The best known effect for this hormone is the promotion of fruit ripening.

00:33 And, as we know, overripe fruit turns rotten, hence the mushewness.

00:38 Ethylene stimulates the conversion of starch and acids to sugars.

00:47 Our second scenario, lateral buds on your phycus plant are sprouting branch shoots.

00:55 This would be the influence of cytokinins.

01:06 Cydokinins are most abundant in growing tissues like roots, embryos, and fruits where cell division is occurring.

01:13 It promotes cytokinesis cell division.

01:17 So it's going to stimulate growth.

01:19 That's why your ficus plant is sprouting.

01:25 For our next scenario, the philodendron in your room is leaning toward the window.

01:36 This would be the influence of oxen.

01:43 Oxen acts as a relay for the effects of blue light responses, although also known as phototropism.

01:50 So positive phototropism is going to cause the plant to lean toward a light source, especially if it is blue light.

02:00 The oxen's promote cell elongation, and that elongation enables the plant to lean toward the light source.

02:08 Oxen...

Please give Ace some feedback