Tolerance and Response of Ornamental Plants to Abiotic Stress—2nd Edition

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Biotic and Abiotic Stress".

Deadline for manuscript submissions: 30 August 2025 | Viewed by 416

Special Issue Editors

College of Life Science and Engineering, Shenyang University, Shenyang 110044, China
Interests: abiotic stress biochemistry; plant response to environmental stress caused by potentially toxic substances; heavy metal phytotoxicity; plant contamination; environmental pollution remediation; ecological remediation technology
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Guest Editor
School of Chemistry and Environmental Engineering, Liaoning University of Technology, Jinzhou 121001, China
Interests: near-surface ozone pollution; plant response to environmental stress caused by potentially toxic substances; carbon-nitrogen-oxygen cycle; environmental pollution remediation
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Special Issue Information

Dear Colleagues,

Ornamental plants are not only very important in environmental decoration but also have wonderful mechanisms for dealing with soil contamination, maintaining a balance between carbon dioxide and oxygen in the environment, purifying the air, controlling humidity, reducing dust and noise, etc.

Nowadays, ornamental plants are challenged by abiotic stress factors such as heavy metal pollution, climate change, elevated near-surface O3 concentrations, low water availability (drought), excess water (flooding/water logging), temperature extremes (cold, frost and heat), and toxicity from salinity, carbon-based nanomaterials, mineral deficiency, and other pollutants. The negative effects of abiotic stresses bring about changes in plant growth, development and metabolism, and, in extreme cases, lead to plant death.

It is thus necessary to evaluate how ornamental plants can tolerate and respond to abiotic stress factors.

This Special Issue welcomes the submission of studies that explore the effect of different abiotic stresses on ornamental plants, including research regarding the growth, development, uptake, accumulation and tolerance capacity, oxidative stress, antioxidative and molecular response, induced defense mechanisms, toxicity effects, etc., of ornamental plants.

Dr. Zhouli Liu
Dr. Yi Zhao
Guest Editors

Manuscript Submission Information

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Keywords

  • ornamental plants
  • abiotic stress
  • tolerance mechanisms
  • stess responses
  • phytotoxicity

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Published Papers (1 paper)

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Research

22 pages, 1868 KiB  
Article
Effects of Exogenous Trehalose on Plant Growth, Physiological and Biochemical Responses in Gardenia Jasminoides Seedlings During Cold Stress
by Dejian Zhang, Jianhao Zheng and Qingping Yi
Horticulturae 2025, 11(6), 615; https://doi.org/10.3390/horticulturae11060615 - 30 May 2025
Viewed by 273
Abstract
In order to explore the effect and mechanism of trehalose (Tre) on the growth and cold resistance of gardenia jasminoides Ellis under low-temperature stress, 15 mmol/L of Tre was used on gardenia seedlings under different degrees of low-temperature stress. The results show that [...] Read more.
In order to explore the effect and mechanism of trehalose (Tre) on the growth and cold resistance of gardenia jasminoides Ellis under low-temperature stress, 15 mmol/L of Tre was used on gardenia seedlings under different degrees of low-temperature stress. The results show that −3 °C (low-temperature stress) significantly inhibited the growth of gardenia, while Tre at 15 mmol/L restored the plant height, number of leaves, total plant weight, and fresh weight of above ground and underground parts to 88.10%, 81.05%, 98%, 87.61% and 96.68% at 20 °C (normal temperature conditions). The total length of the root, number of lateral roots, total root surface area and root volume recovered to 88.48%, 74.08%, 104.03% and 83.77% under normal temperature at 20 °C. The chlorophyll content, chlorophyll fluorescence parameters and photosynthetic intensity parameters in the leaves of gardenia jasminoides were significantly decreased under low-temperature stress at −3 °C, while the contents of chlorophyll a, chlorophyll b and total chlorophyll were significantly increased under 15 mmol/L Tre treatment. Meanwhile, chlorophyll fluorescence parameters (φPSII, Fv′/Fm′ and qP increased by 18.60%, 73.17% and 81.82%, respectively) and photosynthetic intensity parameters (Pn, Gs, Ci and Tr increased by 33.33%, 70.86%, 14.83% and 116.50%, respectively) were also increased. At −3 °C, Tre treatment significantly increased the activities of SOD, POD and CAT in roots, and reduced the content of reactive oxygen species (H2O2 and superoxide anion). At the same time, the contents of root osmotic regulatory substances (proline and malondialdehyde) were decreased by 15.16% and 12.65%, respectively. At −3 °C, Tre significantly increased the root auxin content and significantly decreased the trans-zeanoside content, but had no significant effects on gibberellin and abscisic acid. Tre can also regulate the content of root respiratory metabolites under low-temperature stress, increase the malic acid content by 96.77% under −3 °C, and decrease the succinic acid content by 56.34%. In conclusion, Tre reduces the content of ROS and its damage by improving the antioxidant capacity in roots and enhances the osmoregulation and stability of cell membranes by reducing the content of osmoregulation substances, hormones and aerobic respiratory metabolites in the root, thus enhancing the cold resistance of gardenia. Full article
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