Flavia Teresa Hansen Pacheco
Laboraterio de Biologia Celular e Molecular, Centro de Energia Nuclear na Agricultura,
Universidade de Sao Paulo, Piracicaba, Brazil
Maria Estela Silva-Stenico
Laboraterio de Biologia Celular e Molecular, Centro de Energia Nuclear na Agricultura,
Universidade de Sao Paulo, Piracicaba, Brazil
Darcy Martins da Silva
(In memorian)-Departamento de Bioquimica, Escola Superior de Agricultura Luiz de Queiroz,
Universidade de Sao Paulo, Piracicaba, Brazil
ABSTRACT
Plants of the orange Piralima Citrus sinensis, Osbeck develop symptoms of an anomaly in certain branches that distinguish them from the rest of the plant. Among the various hypotheses raised to explain the cause of this disease is that of Agrobacterium tumefaciens, carrier of the Ti plasmid. Examinations were performed under an optical microscope of the tumors tissue structure that occurs in citrus branches compared with the tumors caused by the Ti plasmid in Kalanchoe tubiflora. The tumors produced in K. tubiflora, caused by different isolates of A. tumefaciens containing the Ti plasmid, revealed the same cell disorganization between the epidermis and the cambial region as the tumors produced in citrus. In the region closer to the cambium, in addition to the disorganization it was observed that the tracheal elements presented greater affinity to safranine. Both in K. tubiflora and in Piralima plants, the increase in the tumor volume resulted in hyperplasia caused by the abnormal activity of the vascular cambium. Anatomic destruction of the peripheral tissues of the organs occurred in both plants.
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How to cite this article
Flavia Teresa Hansen Pacheco, Maria Estela Silva-Stenico and Darcy Martins da Silva, 2006. Anatomy of Citrus sp. and Kalanchoe tubiflora Tumor Tissues. Journal of Biological Sciences, 6: 899-904.
DOI: 10.3923/jbs.2006.899.904
URL: https://scialert.net/abstract/?doi=jbs.2006.899.904
DOI: 10.3923/jbs.2006.899.904
URL: https://scialert.net/abstract/?doi=jbs.2006.899.904
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