Zinc oxide nanoparticle-mediated changes in photosynthetic efficiency and antioxidant system of tomato plants

M. Faizan, A. Faraz, M. Yusuf, S. T. Khan, S. Hayat

Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)

Abstract

The present study was carried out to assess the role of zinc oxide nanoparticles (ZnO-NPs) in tomato plants on growth, photosynthetic efficiency, and antioxidant system. At 20-d stage of growth, roots of tomato plants were dipped into 0, 2, 4, 8, or 16 mg(ZnO-NPs) L–1 for 15, 30, and 45 min and then seedlings were transplanted in their respective cups and allowed to grow under natural environmental conditions. At 45-d stage of growth, the ZnO-NPs treatments significantly increased growth, photosynthetic efficiency together with activities of carbonic anhydrase and antioxidant systems in a concentration- and duration-dependent manner. Moreover, the treatment by 8 mg(ZnO-NPs) L–1 for 30 min proved to be the most effective and resulted in maximum activities of antioxidant enzymes, proline accumulation and the photosynthetic rate. We concluded that presence of ZnO-NPs improved the antioxidant systems and speeded up proline accumulation that could provide stability to plants and improved photosynthetic efficiency.

Original languageEnglish
Pages (from-to)678-686
Number of pages9
JournalPhotosynthetica
Volume56
Issue number2
DOIs
Publication statusPublished - Jun 1 2018
Externally publishedYes

Keywords

  • antioxidant enzyme
  • gas exchange
  • growth
  • micronutrient

ASJC Scopus subject areas

  • Physiology
  • Plant Science

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