Premium
Ospdr9 , which encodes a PDR‐type ABC transporter, is induced by heavy metals, hypoxic stress and redox perturbations in rice roots 1
Author(s) -
Moons Ann
Publication year - 2003
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(03)01060-3
Subject(s) - jasmonic acid , ascorbic acid , chemistry , auxin , salicylic acid , dithiothreitol , biochemistry , hydrogen peroxide , redox , botany , biology , food science , enzyme , organic chemistry , gene
Little is known about the role of pleiotropic drug resistance (PDR)‐type ATP‐binding (ABC) proteins in plant responses to environmental stresses. We characterised ospdr9 , which encodes a rice ABC protein with a reverse (ABC‐TMS 6 ) 2 configuration. Polyethylene glycol and the heavy metals Cd (20 μM) and Zn (30 μM) rapidly and markedly induced ospdr9 in roots of rice seedlings. Hypoxic stress also induced ospdr9 in rice roots, salt stress induced ospdr9 at low levels but cold and heat shock had no effect. The plant growth regulator jasmonic acid, the auxin α‐naphthalene acetic acid and the cytokinin 6‐benzylaminopurine triggered ospdr9 expression. The antioxidants dithiothreitol and ascorbic acid rapidly and markedly induced ospdr9 in rice roots; the strong oxidant hydrogen peroxide also induced ospdr9 but at three times lower levels. The results suggested that redox changes may be involved in the abiotic stress response regulation of ospdr9 in rice roots.