biologia plantarum

Biologia plantarum 49:285-288, 2005 | DOI: 10.1007/s10535-005-5288-4

Growth and ion uptake in Annona muricata and A. squamosa subjected to salt stress

V. M. Passos¹, N. O. Santana¹, F. C. Gama¹, J. G. Oliveira², R. A. Azevedo³, A. P. Vitória⁴

¹ Departamento de Ciéncias Biológicas, Horto Florestal, Universidade Estadual de Feira de Santana, BA, Brasil

² Laboratório de Melhoramento Genético Vegetal, Centro de Ciência e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, RJ, Brasil

³ Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, SP, Brasil

⁴ Laboratério de Ciências Ambientais, Centro de Biociência e Biotecnologia, Universidade Estadual do Norte Fluminense, RJ, Brasil

The effects of treatment with NaCl (3, 100 and 300 mM) for 1, 2, 3 and 7 d on plant growth and ion accumulation were analyzed in 2-week and 8-week-old Annona muricata and A. squamosa plants. Fresh mass and root growth inhibition were directly related to the increase in salinity, particularly for A. squamosa. Two-weeks old seedlings were sensitive to 100 and 300 mM NaCl particularly after 7 d, whereas 8-week-old plants were shown to be more resistant to NaCl even at 300 mM NaCl. Na⁺ and Cl^- mostly accumulated in young leaves. Our results suggest that A. squamosa is more sensitive than A. muricata to salt stress and that older seedlings of both species are more tolerant than younger seedlings.

Keywords: abiotic stress; ion translocation; NaCl

Subjects: abiotic stress; Annona muricata, A. squamosa; leaf age, salt stress; nutrient medium Hoagland and Arnon; salt stress, ion uptake

Received: April 19, 2004; Accepted: August 27, 2004; Published: June 1, 2005Show citation