Krom Stresine Maruz Kalan Mısırda Dışsal Sistein Uygulamasının Etkileri

Cysteine (Cys) is the first organosulfur compound of sulfur metabolism. The products of sulfur metabolism including Cys have biological functions in responses to heavy metal stress and oxidative stress. In this study, therefore, the effects of Cys on alleviating chromium (Cr) toxicity in the leaves of maize (Zea mays L. cv. Bora) seedlings were investigated. Hydroponically grown seedlings were subjected to Cr stress (100 μM) and in combination with Cys (500 μM) for 7 days. Cr stress resulted in toxicity symptoms such as reduced growth, chlorosis, and rolling in leaves. Cr stress decreased the relative water content (RWC), -aminolevulinic acid dehydratase (ALAD) activity, and chlorophyll and protein contents. On the other hand, Cr decreased activities of superoxide dismutase (SOD) and catalase (CAT) in leaves, while increased the activity of peroxidase (POD). In addition, Cr increased the accumulation of malondialdehyde (MDA) and cysteine contents. Exogenous application of Cys to rooting media alleviated Cr-induced growth suppression. Exogenous Cys promoted the chlorophyll accumulation and cysteine content under Cr stress. Moreover, application of Cys increased the activities of SOD and CAT, and markedly diminished Cr-induced MDA accumulation. These results suggest that the exogenous application of Cys reduced the negative consequences of oxidative stress caused by Cr stress.

• Publication year

  2020

• Venue

  Afyon Kocatepe University Journal of Sciences and Engineering

• Publication date

  2020-06-30

• Fields of study

  Agricultural and Food Sciences, Chemistry, Environmental Science

• Identifiers
  DOI 10.35414/AKUFEMUBID.695420
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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