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Showing 2 results for Photosynthetic Pigments
Comparison of Nano Fe Chelate with Fe Chelate Effect on Growth Parameters and Antioxidant Enzymes Activity of Ocimum Basilicum
Maryam Peyvandi, Haniyeh Parande, Mahdi Mirza,
Volume 1, Issue 4 (10-2011)
Abstract

Aim and Background. Sweet basil (Ocimum basilicum) belongs to the Lamiaceae family. In this study the effect of nano iron chelated fertilizer and iron chelated fertilizer on growth parameters, leaves photosynthetic pigments, protein, and the activity of of some antioxidant enzymes in leaf were investigated.

Materials and Methods. The experiment was conducted in farm condition in the form of randomized design based on four replications. Plants were treated by different concentrations of iron chelated fertilizer (1.5 ,4.5 ,7.5 kgha-1) and nano Fe chelated fertilizer (1, 3 ,5 kgha-1).

Results. Results indicated that growth parameters increased in plants treated with Fe fertilizer (7.5 kgha-1) and nano Fe fertilizer with less than 5kgha-1. The antioxidant enzymes activity in the Fe treatments was more than nano Fe treatments. Moreover, nano iron fertilizer resulted in the reduction of protein amounts in comparison with iron fertilizer treatments.

Conclusion.The results showed that Fe fertilizer could be replaced by nano Fe fertilizer.


Investigation of the effect of microgravity and light spectrum on the antioxidant enzymes activity, elements and photosynthetic pigments of Physalis alkekengi in vitro.
Farzad Alani, Alireza Iranbakhsh, Mostafa Ebadi, Halimeh Hassanpour, Azadeh Hekmat,
Volume 13, Issue 49 (12-2022)
Abstract
Aim and Background: This study aimed to investigate the effect of microgravity and light spectral composition on the levels of antioxidant enzyme activity, minerals, and  some photosynthetic pigments in Physalis alkekengi.
Material and methods: This study was performed in vitro. Seedlings were exposed to the microgravity treatments under two different light conditions, including white (C) and red+blue (R+B).
Results: The microgravity treatments were more capable of rapidly influencing growth performance than the light spectrum quality. Red+blue light increased the amount of chlorophyll a and b. Antioxidant enzymes under microgravity stress showed an increase, while changing the quality of the light spectrum did not make a significant difference. An increase in malondialdehyde (MDA) was observed in the microgravity treatment compared to the light spectrum. The amount of Cu+2 and Zn+2 were increased by the R+B+microgravity treatment. However, Mn+2 was increased in the microgravity treatment. The highest uptake of Fe+2 and Ca+2 was recorded under microgravity conditions. R+B+Microgravity treatment increased K+ content compared to white control. The microgravity treatment increased Mg+2 in the root cell.
Conclusion: In general, microgravity and light spectrum can increase biomass. Microgravity has little effect on photosynthetic pigments, but the R+B light spectrum increased the pigments. Microgravity increased the activity of antioxidant enzymes and the content of MDA. The concentration of some elements in roots and leaves can be modified by the light and microgravity conditions.




 
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