Lead induced antioxidant defense system in pigeon pea and its impact on yield and quality of seeds

• Autorzy: Nautiyal N. , Sinha P.
• Języki publikacji: EN

Abstrakty

EN

Toxic effects of lead (>0.2 mM Pb) were measured in pigeon pea (Cajanus cajan Mill) cv. UPAS grown in sand culture as reduction in growth, yield, and quality of seeds. Leaves containing>38 µg g⁻¹ Pb showed oxidative damage as decrease in chlorophyll content and induction of antioxidants such as carotenoids, proline, and non-protein thiol contents with enhanced activities of SOD and peroxidase. At excess (>0.2 mM) Pb, accumulation of >1,000 µg Pb g⁻¹ root tissue was associated with increase in non-protein thiol content. It is concluded that inhibition in root-to-shoot translocation of Pb and induction in the level of proline, chloroplast pigments, and non-protein thiols and activities of antioxidant enzymes SOD and peroxidase at <0.2 mM Pb could have protected the pigeon pea plants from the deleterious effects of Pb. However, excess Pb at >0.2 mM showed a decline in yield, boldness, and quality of seeds despite the expression of an additional band each of Cu–Zn SOD and peroxidase isoform. The threshold of toxicity and toxicity values in pigeon pea leaves of plants exhibiting 10 and 33% yield depression at 27 days after metal supply were 27 and 56 µg Pb g⁻¹, respectively.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2012
• Tom: 34
• Numer: 3
• Opis fizyczny: p.977-983,fig.,ref.

Twórcy

autor

Nautiyal N.

• Botany Department, University of Lucknow, 226007 Lucknow, India

autor

Sinha P.

• Botany Department, University of Lucknow, 226007 Lucknow, India

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