Prospective effects of methyl jasmonate to ameliorate Celosia argentea L. growth under low light conditions


  • Samah Mostafa El-Sayed Ornamental Plants and Woody Trees Dept., National Research Centre, Dokki, Giza, Egypt.
  • Amr Said Mohamed (2)Botanical Gardens Research Dept., Horticulture Research Institute, Agricultural Research Center, Egypt. (3)Lab of Biotechnology, Horticulture Research Institute, Agricultural Research Center, Egypt.
  • Asmaa E. Abd Elhafez Lab of Biotechnology, Horticulture Research Institute, Agricultural Research Center, Egypt.


Celosia argentea, methyl jasmonate (MeJA), shade, plant growth, lipid peroxidation, MDA, SDS-PAGE


The current study was carried out to investigate the potential impact of methyl jasmonate (MeJA) at concentrations 0, 0.025, 0.05 and 0.1mM in raise Celosia argentea plant's ability to grow balanced under the influence of lack of light. When testing the plant for growth in a shaded place and comparing it with plants growing under sunlight, it was found that the shade treatment increased plant height, fresh and dry mass of spikes, photosynthetic pigments, flavonoids, and lipid peroxidation, whereas decreased the rest vegetative parameters (stem diameter, number of leaves/ plant, number of branches/ plant, leaf area, root length, fresh and dry mass of shoot and root), number of spikes/ plant, spike length, total sugars and anthocyanin content. The effect of MeJA on plants varied depending on light condition, where most vegetative parameters, all spike traits and anthocyanin pigment of the plants grown under full sunlight condition + 0mM MeJA produced the height values, while the treatment full sunlight+0.05 gave the highest values of chl.b, carotenoids, total sugars and flavonoids, but MDA was the highest with 0.1mM comparing with other treatment under the same light condition.
On the other hand, the plants grown in shade were affected by MeJA treatment but the highest values for determined parameters fluctuated between concentrations 0.025 and 0.05mM. Based on the SDSPAGE, the results showed that the plants treated with full sunlight + MeJA at 0, 0.05 and 0.1mM or shade + MeJA at 0 and 0.025 mM gave the largest number of polypeptides (9), while the lowest
number of polypeptides (6) showed in the plants treated with shade+ MeJA at 0.1mM.