24-EPIBRASSINOLIDE MITIGATES Cd-INDUCED TOXICITY THROUGH IMPROVED ANTIOXIDATIVE SYSTEM IN MAIZE (<i>ZEA MAYS L</i>.) PLANT

DALYAN E.

FRESENIUS ENVIRONMENTAL BULLETIN, no.9A, pp.8421-8434, 2020 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Publication Date: 2020
  • Journal Name: FRESENIUS ENVIRONMENTAL BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Agricultural & Environmental Science Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, Environment Index, Geobase, Greenfile, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Page Numbers: pp.8421-8434
  • Istanbul University Affiliated: Yes

Abstract

The present study was undertaken to investigate how 24-epibrassinolide affects the antioxidant system in maize plants exposed to cadmium (Cd) toxicity. Cd treatment (0 and 25 mu M) was performed to maize plants pretreated with the different concentrations of 24-epibrassinolide (0, 10(-11), and 10(-9) M). The roots and shoots of maize plants were harvested to analyze on the 2 and 7 days after Cd treatment (DAT). The Cd accumulation in the only Cd-treated maize roots and shoots led to an increase in H(2)0(2) and MDA levels, and a decrease in growth and the amounts of photosynthetic pigment. Besides, total protein content and the activities of antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase, peroxidase, glutathione reductase, and glutathione-S-transferase) changed depending on the duration of Cd treatment. With the pretreatments of 24-epibrassinolide to the Cd-stressed plants, H(2)0(2) and MDA contents decreased, growth improved, the contents of photosynthetic pigment, total protein level, and antioxidant enzyme activities show enhancement despite further increased Cd accumulation. These results revealed that 24-epibrassinolide mitigated the adverse effects of Cd stress in the roots and shoots of maize plants. depending on the hormone concentration and metal treatment duration.