Cannabis sativa vs ruderalis: Plant Characteristics

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Questions and Answers

Why do plants growing outside of cultivation remain short?

Due to their adaptation to short seasons and stressful environments. (correct)

Because they are not provided with sufficient nutrients.

Because they are not receiving adequate sunlight.

Because they are genetically programmed to remain short.

What is the effect of crowding on the branching pattern of C. sativa?

It suppresses branching and promotes vertical growth. (correct)

It increases the production of seeds.

It has no effect on the branching pattern.

It promotes branching and reduces vertical growth.

What is the main reason for the differences in height and branching pattern between domesticated and wild C. sativa?

Environmental factors such as sunlight and water.

Selection by humans to maximize production of the desired product. (correct)

Genetic differences between the two.

Random mutations that occur over time.

What is the purpose of Figure 6.1?

To illustrate the organs of C. sativa. Signup and view all the answers

What is the characteristic of 'indica type' marijuana plants?

They are shorter and have fewer branches. Signup and view all the answers

What is the effect of density of planting on the growth of C. sativa?

It suppresses branching and promotes vertical growth. Signup and view all the answers

What is the purpose of Janischevsky's experiment with C. ruderalis?

To observe the growth of plants in well-manured sites. Signup and view all the answers

What is the primary factor that affects the growth pattern of C. sativa?

Selection by humans to maximize production of the desired product. Signup and view all the answers

Why are plants of the same architecture as sativa type marijuana suitable for essential oil production?

They are big and well branched, producing many flowers. Signup and view all the answers

What is the main purpose of removing male plants?

To prevent production of seeds. Signup and view all the answers

What is a recent market that has developed for the production of?

Essential oil. Signup and view all the answers

Why are plants with limited branching naturally superior for occupying a field?

They fully and uniformly occupy a field and maximize solar irradiation. Signup and view all the answers

What is the main reason big and well-branched plants are used for oilseed production?

They produce more flowers and seeds when allowed to produce seeds. Signup and view all the answers

Why are short plants with numerous flowers grown at moderate densities?

To reduce stem tissue production. Signup and view all the answers

What is the main purpose of planting at low density?

To leave room for the branches to develop well. Signup and view all the answers

What is the primary source of the intoxicating chemicals?

Perigonal bracts around the female flowers. Signup and view all the answers

Study Notes

Characteristics of Wild and Domesticated Cannabis Plants

Wild cannabis plants growing outside of cultivation are short due to stressful environments or short seasons.
When grown in well-manured sites, these plants can grow very large.

Shoot Architecture of Domesticated Cannabis Plants

Domesticated plants have been altered to maximize production of desired products (stem fiber, drugs, or seeds).
Planting density affects shoot architecture, with crowding suppressing branching and promoting vertical growth.

Field Configuration Patterns

Various field configurations are used to promote or suppress branching, depending on the desired product.
Figure 6.3 shows different shoot configurations for marijuana strains of C. sativa.

Characteristics of Marijuana Plants

There are two basic classes of marijuana plants: "indica type" (shorter) and "sativa type" (taller).
These plants are naturally well-branched and are traditionally planted at low density to allow for branch development.
Maximizing branch production is desirable for producing many flowers and intoxicating chemicals.

Production of Essential Oil and Oilseeds

Essential oil is produced from the perigonal bracts of female flowers.
Plants with the same architecture as sativa type marijuana are used as sources of essential oil.
Plants with limited branching are superior for producing oilseeds, as they can fully and uniformly occupy a field and maximize solar irradiation.

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Description

Explore the differences between Cannabis sativa and Cannabis ruderalis in terms of growth, adaptation, and shoot architecture. Learn how environmental factors influence their development.