Effect of chitosan, brassinosteroids and myo-inositol on pot marigold plants | ||
| SVU-International Journal of Agricultural Sciences | ||
| Volume 7, Issue 3, September 2025, Pages 136-149 PDF (687.31 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/svuijas.2025.410952.1493 | ||
| Authors | ||
| Hanaa A. A. Ramadan* 1; A. A. Rashwan1; T. M Elameen2; M. A. H. Mohamed3 | ||
| 1Department of Horticulture, Faculty of Agriculture, South valley University, Qena 83523, Egypt | ||
| 2Department of Agricultural Botany, Faculty of Agriculture, South valley University, Qena 83523, Egypt | ||
| 3Department of Horticulture, Faculty of Agriculture, Minia University | ||
| Abstract | ||
| The annual herbaceous pot marigold (Calendula officinalis L.), valued for its ornamental and medicinal properties. Different plant biostimulants could use for minimizing the negative effects of agricultural chemicals on ecosystems and human health Calendula officinalis was subjected to a split-plot experiment. Main plot treatments consisted of chitosan (CH) at 0.00, 0.20, 0.40, and 0.60 g/L, while subplots received either brassinolide (BR) at 0.10 or 0.20 g/L, or myo-inositol (MYO) at 0.25 or 0.50 g/L. All treatments improved plant and flower fresh and dry weights, and there were clear interactions between CH and BR/MYO. The highest total biomass (64.39 g/plant) came from 0.60 g/L CH + 0.10 g/L BR, while 0.60 g/L CH + 0.50 g/L MYO produced the most flowers (50) and the heaviest dry flowers (144.5 g/plant). Plants with no treatment had the lowest yield and chlorophyll content (SPAD = 40.17), whereas 0.40 g/L CH + 0.50 g/L MYO achieved the highest chlorophyll level (SPAD = 46.87). Both CH and BR/MYO significantly boosted N, P, and K levels in the plants. For optimal fresh and dry flower yield, application of 0.60 g/L CH combined with either 0.20 g/L BR or 0.50 g/L MYO is recommended. | ||
| Keywords | ||
| Calendula officinalis; Flower yield; Growth promotion; Myo inositol; Plant Biostimulants | ||
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