Document Type : Original Article
Authors
1
MSc. graduate , Department of Plant Productions, Agricultural Faculty of Bardsir, Shahid Bahonar University of Kerman, Kerman, Iran
2
Associate Professor , Department of Plant Productions, Agricultural Faculty of Bardsir, Shahid Bahonar University of Kerman, Kerman, Iran
3
Associate Professor, Department of Plant Production, University of Torbat Heydarieh, Torbat Heydarieh, Iran
10.22034/plant.2024.141245.1102
Abstract
Seed priming used in order to improve germination and produce strong seedlings plays a key role in improving plant resistance to biological stresses. In order to investigate the potential of seed priming with some organic substances in increasing the resistance of marigolds to cadmium toxicity, an experiment with a factorial layout was conducted using a completely randomized design in three replications in the research laboratory of Shahid Bahonar University, Kerman.The treatments were included three Cd levels (0, 40, 60 mg/kg) and eight types of priming including no pretreatment (control), beeswax waste extract, licorice, haloxylon, vermicompost, cordia, water (water distilled) and salicylic acid (SA). The results showed that with increasing of Cd concentration, the germination indexes and also the amount of protein of marigold seedlings decreased and the content of proline and gayacol peroxsidase (GPX) enzyme activity increased significantly. Germination percentage, seedling dry weight, stem length, root, root-to-stem ratio, and catalase (CAT) enzyme activity in stress and non-stress conditions in priming with beeswax waste and vermicompost extract were increased. Haloxylon and licorice showed the lowest values in the mentioned traits. In severe stress conditions (60 ppm), the highest protein content was related to the priming with vermicompost and beeswax waste extract. In general, the results of this research showed that seed priming with vermicompost and beeswax waste extract reduced the negative effects of cadmium stress in marigold.
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