biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 44:213-218, 2001 | DOI: 10.1023/A:1010291124178

Effect of a Brassinosteroid Analogue and High Temperature Stress on Leaf Ultrastructure of Lycopersicon Esculentum

O. Sam1, M. Núñez1, M.C. Ruiz-Sánchez2, J. Dell'Amico1,2, V. Falcón3, M.C. De la Rosa3, J. Seoane3
1 Departamento de Fisiología y Bioquímica Vegetal, Instituto Nacional de Ciencias Agri'icolas, San José de las Lajas, La Habana, Cuba
2 Departamento de Riego y Salinidad, Centro de Edafología y Biología Aplicada del Segura, Murcia, Spain
3 Departamento de Microscopía Electrónica, Centro de Ingeniería Genética y Biotecnología, La Habana, Cuba

The ultrastructure of tomato leaf disks treated with a biostimulator (0.01 mg dm-3 BB6, brassinosteroid analogue from Cuba), and subjected to high temperature (40 °C for 1.5 h) was studied. High temperature stress caused the appearance of granules in the nucleus, nucleolus and cytoplasm. In chloroplasts and in mitochondria the internal membrane system was disorganised and in chloroplasts some starch granules were detected. These symptoms were more marked in the cells treated with BB6. The influence of BB6 on the ultrastructure of leaf cells was apparent also before being subjected to heat stress.

Keywords: biostimulator; chloroplast; tomato; ultrastructure
Subjects: chlorophylls, high temperature; Lycopersicon esculentum; temperature, high, leaf ultrastructure; tobacco

Published: June 1, 2001  Show citation

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Sam, O., Núñez, M., Ruiz-Sánchez, M.C., Dell'Amico, J., Falcón, V., De la Rosa, M.C., & Seoane, J. (2001). Effect of a Brassinosteroid Analogue and High Temperature Stress on Leaf Ultrastructure of Lycopersicon Esculentum. Biologia plantarum, 44(2), 213-218. doi: 10.1023/A:1010291124178
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