The Effect of Exogenous Melatonin on the Photosynthetic Characteristics of Rhododendron simsii Under Cadmium Stress DOI Creative Commons

Haochen Di,

Ying Liang,

Yuting Gong

et al.

Plants, Journal Year: 2025, Volume and Issue: 14(1), P. 125 - 125

Published: Jan. 3, 2025

Rhododendron simsii (R. simsii), a significant ornamental plant species, is adversely affected by the severe soil heavy metal pollution resulting from rapid industrialization, particularly in terms of its growth environment. Cadmium (Cd), representative pollutant, poses threat to and photosynthetic physiology. Despite importance understanding Cd stress resistance rhododendrons, research this area limited. This study focused on role exogenous melatonin (MT) mitigating Cd-induced stress, emphasizing impact Gas exchange parameters, prompt delayed fluorescence (DF), 820 nm modulated reflectance (Mr820), antioxidant enzyme activity, were measured. The findings revealed that under MT-free treatment imposed more limitation both stomatal non-stomatal processes R. leaves, significantly reducing net rate. In contrast, MT improved efficiency increasing maximum photochemical photosystem II, quantum yield electron transport, performance index. DF Mr820 analysis demonstrated provided robust protection donor receptor sides photosystems I II. Furthermore, decreased malondialdehyde (MDA) content, marker oxidative enhanced activity enzymes, including superoxide dismutase (SOD) guaiacol peroxidase (POD). conclusion, plays critical alleviating enhancing defense mechanisms safeguarding apparatus, thereby improving tolerance simsii.

Language: Английский

The Effect of Exogenous Melatonin on the Photosynthetic Characteristics of Rhododendron simsii Under Cadmium Stress DOI Creative Commons

Haochen Di,

Ying Liang,

Yuting Gong

et al.

Plants, Journal Year: 2025, Volume and Issue: 14(1), P. 125 - 125

Published: Jan. 3, 2025

Rhododendron simsii (R. simsii), a significant ornamental plant species, is adversely affected by the severe soil heavy metal pollution resulting from rapid industrialization, particularly in terms of its growth environment. Cadmium (Cd), representative pollutant, poses threat to and photosynthetic physiology. Despite importance understanding Cd stress resistance rhododendrons, research this area limited. This study focused on role exogenous melatonin (MT) mitigating Cd-induced stress, emphasizing impact Gas exchange parameters, prompt delayed fluorescence (DF), 820 nm modulated reflectance (Mr820), antioxidant enzyme activity, were measured. The findings revealed that under MT-free treatment imposed more limitation both stomatal non-stomatal processes R. leaves, significantly reducing net rate. In contrast, MT improved efficiency increasing maximum photochemical photosystem II, quantum yield electron transport, performance index. DF Mr820 analysis demonstrated provided robust protection donor receptor sides photosystems I II. Furthermore, decreased malondialdehyde (MDA) content, marker oxidative enhanced activity enzymes, including superoxide dismutase (SOD) guaiacol peroxidase (POD). conclusion, plays critical alleviating enhancing defense mechanisms safeguarding apparatus, thereby improving tolerance simsii.

Language: Английский

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