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Qi Y, Ma L, Ghani MI, Peng Q, Fan R, Hu X, Chen X. Effects of Drought Stress Induced by Hypertonic Polyethylene Glycol (PEG-6000) on Passiflora edulis Sims Physiological Properties. Plants (Basel) 2023; 12:2296. [PMID: 37375921 PMCID: PMC10305440 DOI: 10.3390/plants12122296] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 06/01/2023] [Accepted: 06/03/2023] [Indexed: 06/29/2023]
Abstract
Passion fruit is known to be sensitive to drought, and in order to study the physiological and biochemical changes that occur in passion fruit seedlings under drought stress, a hypertonic polyethylene glycol (PEG) solution (5%, 10%, 15%, and 20%) was used to simulate drought stress in passion fruit seedlings. We explored the physiological changes in passion fruit seedlings under drought stress induced by PEG to elucidate their response to drought stress and provide a theoretical basis for drought-resistant cultivation of passion fruit seedlings. The results show that drought stress induced by PEG had a significant effect on the growth and physiological indices of passion fruit. Drought stress significantly decreased fresh weight, chlorophyll content, and root vitality. Conversely, the contents of soluble protein (SP), proline (Pro), and malondialdehyde (MDA) increased gradually with the increasing PEG concentration and prolonged stress duration. After nine days, the SP, Pro and MDA contents were higher in passion fruit leaves and roots under 20% PEG treatments compared with the control. Additionally, with the increase in drought time, the activities of antioxidant enzymes such as peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) showed an increasing trend and then a decreasing trend, and they reached the highest value at the sixth day of drought stress. After rehydration, SP, Pro and MDA contents in the leaves and roots of passion fruit seedlings was reduced. Among all the stress treatments, 20% PEG had the most significant effect on passion fruit seedlings. Therefore, our study demonstrated sensitive concentrations of PEG to simulate drought stress on passion fruit and revealed the physiological adaptability of passion fruit to drought stress.
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Affiliation(s)
- Ying Qi
- College of Agriculture, Guizhou University, Guiyang 550025, China
- International Jointed Institute of Plant Microbial Ecology and Resource Management in Guizhou University, Ministry of Agriculture, China Association of Agricultural Science Societies, Guiyang 550025, China
- Guizhou-Europe Environmental Biotechnology and Agricultural Informatics Oversea Innovation Center, Guizhou Provincial Science and Technology Department, Guizhou University, Guiyang 550025, China
| | - Lingling Ma
- College of Agriculture, Guizhou University, Guiyang 550025, China
- International Jointed Institute of Plant Microbial Ecology and Resource Management in Guizhou University, Ministry of Agriculture, China Association of Agricultural Science Societies, Guiyang 550025, China
- Guizhou-Europe Environmental Biotechnology and Agricultural Informatics Oversea Innovation Center, Guizhou Provincial Science and Technology Department, Guizhou University, Guiyang 550025, China
| | - Muhammad Imran Ghani
- College of Agriculture, Guizhou University, Guiyang 550025, China
- International Jointed Institute of Plant Microbial Ecology and Resource Management in Guizhou University, Ministry of Agriculture, China Association of Agricultural Science Societies, Guiyang 550025, China
- Guizhou-Europe Environmental Biotechnology and Agricultural Informatics Oversea Innovation Center, Guizhou Provincial Science and Technology Department, Guizhou University, Guiyang 550025, China
- College of Life Sciences, Guizhou University, Guiyang 550025, China
| | - Qiang Peng
- College of Agriculture, Guizhou University, Guiyang 550025, China
- International Jointed Institute of Plant Microbial Ecology and Resource Management in Guizhou University, Ministry of Agriculture, China Association of Agricultural Science Societies, Guiyang 550025, China
- Guizhou-Europe Environmental Biotechnology and Agricultural Informatics Oversea Innovation Center, Guizhou Provincial Science and Technology Department, Guizhou University, Guiyang 550025, China
| | - Ruidong Fan
- College of Agriculture, Guizhou University, Guiyang 550025, China
- International Jointed Institute of Plant Microbial Ecology and Resource Management in Guizhou University, Ministry of Agriculture, China Association of Agricultural Science Societies, Guiyang 550025, China
- Guizhou-Europe Environmental Biotechnology and Agricultural Informatics Oversea Innovation Center, Guizhou Provincial Science and Technology Department, Guizhou University, Guiyang 550025, China
| | - Xiaojing Hu
- College of Agriculture, Guizhou University, Guiyang 550025, China
- International Jointed Institute of Plant Microbial Ecology and Resource Management in Guizhou University, Ministry of Agriculture, China Association of Agricultural Science Societies, Guiyang 550025, China
- Guizhou-Europe Environmental Biotechnology and Agricultural Informatics Oversea Innovation Center, Guizhou Provincial Science and Technology Department, Guizhou University, Guiyang 550025, China
| | - Xiaoyulong Chen
- International Jointed Institute of Plant Microbial Ecology and Resource Management in Guizhou University, Ministry of Agriculture, China Association of Agricultural Science Societies, Guiyang 550025, China
- Guizhou-Europe Environmental Biotechnology and Agricultural Informatics Oversea Innovation Center, Guizhou Provincial Science and Technology Department, Guizhou University, Guiyang 550025, China
- College of Life Sciences, Guizhou University, Guiyang 550025, China
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