Cadmium exposure triggers genotype-dependent changes in seed vigor and germination of tomato offspring

Autor(es)

Amaral Carvalho, Marcia Eugenia ^[1] ; Piotto, Fernando Angelo ^[1] ; Nogueira, Marina Lima ^[1] ; Gomes-Junior, Francisco Guilhien ^[2] ; Carmignani Pescarin Chamma, Helena Maria ^[2] ; Pizzaia, Daniel ^[1] ; Azevedo, Ricardo Antunes ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, ESALQ, Dept Genet, BR-13418900 Piracicaba, SP - Brazil

^[2] Univ Sao Paulo, ESALQ, Dept Prod Vegetal, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PROTOPLASMA; v. 255, n. 4, p. 989-999, JUL 2018.
• Citações Web of Science: 16

Resumo

Although negative effects on the offspring fitness can be triggered by the mother-plant exposure to environmental stresses, some plants are able to ``remember{''} past incidents and enhance the progeny tolerance. Here, the mineral profile, cytogenetic modifications, and physiological potential of seeds from two tomato cultivars, with contrasting tolerance degrees to cadmium (Cd) toxicity, were evaluated after plant exposure to this metal. Both cultivars exhibited high Cd translocation to the seeds; however, the tolerant tomato accumulated more Cd than did the sensitive one. As a consequence of the Cd accumulation, reductions in the Mn concentration in Cd-challenged plants were detected. Surprisingly, seed germination and vigor were increased in the tolerant tomato cultivar after Cd exposure, despite increases in the chromosomal abnormalities. By contrast, seeds from the sensitive cultivar exhibited no changes in their physiological potential after Cd exposure, despite Cd-induced reductions in the mitotic index. Moreover, bunch position exerted effects on the vigor and type of chromosomal abnormality. The results show that maternal plant exposure to Cd can affect tomato offspring by changing the seed physiological potential, and such effect can be partially explained by alterations in the seed-derived elements (essential and non-essential) and genotype-dependent tolerance mechanisms. (AU)

• Processo FAPESP: 09/54676-0 - Estresse oxidativo induzido por metais: novas abordagens
• Beneficiário: Ricardo Antunes de Azevedo
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/15217-5 - Abordagem integrada de parâmetros anatômicos, fisiológicos, bioquímicos e moleculares para o estudo de mecanismos de tolerância ao cádmio em acessos de tomateiro
• Beneficiário: Marcia Eugenia Amaral de Carvalho
• Modalidade de apoio: Bolsas no Brasil - Doutorado