Image Number: 1440138

Descriptor:
Damage
Description:
Genetically abnormall tobacco plants, while usually of little or no economic importance, may be confused with infectious disease or chemical injuries. These abnormalities may be called monstosities, malformations, enations, anamolies, throwbacks, kickbacks, or runouts. It is unusual to find more than one of these abnormal plants in a field. Most fields contain none. Chimeras or variegated tobacco plants have irregular patches on the leaves that vary in color from creamy-white to yellow-green and give the plant a marbled or mottled appearance. Most variegated plants attain normal size, bloom normally, and produce seed. Sometimes abnormally shaped leaves appear on the affected plant. Patterns may be seen in the cured leaves from variegated plants. Another example of genetic abnormality is ruffles. Leaf margins roll downward, and leaves curve downward. Petioles may be elongated. The leaf blade margin may form pouches or folds upon itself, especially along veins on the underside of the leaf.
Image type:
Field

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Image location:
United States

Subject

Kingdom: Other damage agents
Phylum: Other damage agents
Class: Other damage agents
Order: Abiotic
Family: Other abiotic damage
Subject: genetic abnormalities

Host

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Solanales
Family: Solanaceae
Genus: Nicotiana
Subject: Nicotiana tabacum (burley type) L.
Node Affiliation:
Image uploaded:
Monday, January 1, 1990
Image last updated:
Thursday, July 28, 2011