Leaf Water Content and Gas Exchange of Melatonin Applied Eggplant Seedlings under Drought Stress


Örs Cırık S., Yıldırım E., Şahin Ü., Ekinci M., Altun M.

1st International Congress on Biosystems Engineering, Hatay, Türkiye, 24 - 27 Eylül 2019, ss.41

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Hatay
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.41
  • Atatürk Üniversitesi Adresli: Evet

Özet

Melatonin in plant first discovered in 1995, since then it has drawn more and more attention for its complex roles in plants. Melatonin helps plants respond to light and dark cycles and respond to difficult environments. It is considered an antioxidant with important actions in the control of reactive oxygen and harmful oxidative molecules present in plant cells. We investigated the effects of melatonin with different doses (0, 5, 25, 50, 100, 150 μM) on leaf gas exchange in eggplant seedlings under drought stress. We measured leaf water content, photosynthesis, transpiration rate, stomatal conductance and concentration of intercellular CO2 of the eggplant seedlings before harvest. Photosynthesis decreased with drought stress as compared to control, but the foliar application of melatonin improved plant photosynthesis both under drought and well-watered conditions as compared to control treatment. However increased application doses of melatonin were not as favorable as the initial application doses. We also found that foliar application of melatonin increased the leaf water content of the eggplant at all application doses under drought.