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Cannaversity .: Glossary

Glossary


Terms in glossary: 321.

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Abaxial
Oriented away from the stem meristem; the lower surface of a leaf.
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Abiotic stress
Non-living environmental factors such as frost, drought, excessive heat, etc. that can have harmful effects on plants.
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Abscisic acid
mediates stress tolerance responses in higher plants, is a key signal compound that regulates stomatal aperture and, in concert with other plant signaling compounds, is implicated in mediating responses to pathogens and wounding.In seeds, ABA promotes seed development, embryo maturation, synthesis of storage products (proteins and lipids), desiccation tolerance, is involved in maintenance of dormancy (inhibition of germination), and apoptosis. As well, ABA affects plant architecture, including root growth and morphology, and root-to-shoot ratios.
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Accessory Pigment
pigment other then the primary pigment (chlorophyll) which collects solar energy.
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Acclimatize
To Become adapted to new environmental conditions.
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Achene
A hard-shelled seed encased by a simple thin closed shell, such as a cannabis seed.
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Adaxial
Oriented toward the shoot's meristem.
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Adnate
Attached at the margin.
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Adventitous Roots
Roots that appear spontaneously from stems and old roots.
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Aeroponics
The growing of plants in a container in which the roots are suspended in a nutrient mist rather than in a solution. The most popular container for aeroponics is an enclosed A-frame constructed of Styrofoam boards. The plants are placed in holes along the sloped sides of the frame. The nutrient mist is delivered to the roots by a vaporizer or by special attachments available with drip irrigation kits. The mist clings to the roots. Any excess runs down the inside of the frame, is collected at the bottom, and is recycled back to the nutrient reservoir.
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Alternate Phyllotaxy
Leaves appear singly in a loose staggered spiral along the stem.
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Alternating leaf
As the plant grows, in the beginning, every leaf(that is not damaged) will have another leaf growing from exactly 180 degrees on around the stem. they grow in pairs. when the plants mature, the leaves will grow one at a time. that is a leaf will pop out on one side, then, up the stem/ branch, another will grow. i.e. alternating.
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Aneuploid
An organism with an unbalanced set of chromosomes (i.e., 2n-1 or 2n+1).
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Anthesis
The time of maturation of a flower.
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Anthocyanin Pigment
An accessory pigment, usually red or purple, seen in some cannabis varieties, especially during late floral stage.
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Anticlinal
Perpendicular to the surface.
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Apical
Tip or top position.
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Arborescent
Tree-like.
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Asexual Propagation
Vegetative reproduction by cloning, which produces offspring genotype identical to that of the parent plant.
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Auxins
Are plant hormones governing many biological processes in higher plants such as cell enlargement and division, differentiation of vascular tissue, apical dominance, root initiation and signaling.
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Axil
The angle between the upper side of the stem and a leaf, branch, or petiole.
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Axillary bud
A bud that develops in the axil.
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Back crossing
crossing of an offspring with one of the parents to reinforce a parental trait.
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Ballast
Provides current and power to a high intensity light bulb.
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Blood Meal
This organic fertilizer is very high in nitrogen and is very soluble in water (unlike most other dry organic fertilizers). It also contains plant growth regulators. All this together means that its effect is strong and quick, but its power will only last a short while, especially in wet weather. When applying blood meal, take care, as it will easily burn a plant's leaves.
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