Effects of Aflatoxin on Seeding Growth and Ultrastructure in Plants
AUTOR(ES)
Crisan, Eli V.
RESUMO
Nineteen plants belonging to 11 species of the cruciferae were studied to determine the effects of aflatoxin B1 on seed germination and seedling development. Germination was not inhibited in any test organism at a concentration of 100 μg of aflatoxin per ml of agar substrate. Inhibition of elongation of the hypocotyls and roots in the species studied varied from 29 to 93% and from 22 to 91% in the respective tissues. Lepidium sativum was the most susceptible plant studied and exhibited the maximal inhibitory response noted above at concentrations of 8 μg of aflatoxin per ml. The ultrastructure of Lepidium root cells treated with crystalline aflatoxin B1 exhibited morphological changes characteristic of those found in aflatoxin-treated animal cells. In addition to changes in the cytoplasmic organelles, numerous ring-shaped nucleoli with prominent nucleolar caps were produced. The effect of aflatoxin on plant cells is compared with similar effects induced by actinomycin D. Seed germination and seedling development is discussed in relation to the effects of both compounds on deoxyribonucleic acid-dependent ribonucleic acid biosynthesis.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=379944Documentos Relacionados
- Effects of Aflatoxin on Germination and Growth of Lettuce
- In Vitro Effects of Amphotericin B on Growth and Ultrastructure of the Amoeboflagellates Naegleria gruberi and Naegleria fowleri
- Plants under Climatic Stress: II. Low Temperature, High Light Effects on Chloroplast Ultrastructure
- WIND DIRECTIONS ALOFT AND EFFECTS OF SEEDING ON PRECIPITATION IN THE WHITETOP EXPERIMENT*
- Effects of Growth Substances on the Absorption and Transport of Iron Plants