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Ma W, Zhu M, Wan Y, Cai H, Sun Y, Jiao P, Liu Y. Mitochondrial pathway of programmed cell death in Paeonia lactiflora pollen cryopreservation. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 345:112107. [PMID: 38685455 DOI: 10.1016/j.plantsci.2024.112107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 04/01/2024] [Accepted: 04/22/2024] [Indexed: 05/02/2024]
Abstract
Programmed cell death (PCD) is an important factor to reduces the viability of plant germplasm after cryopreservation. However, the pathways by which PCD occurs is not fully understood. To investigate whether there is a mitochondrial pathway for pollen PCD after cryopreservation, the pollen of Paeonia lactiflora two cultivars with different PCD levels after cryopreservation was used as test material and the changes of mitochondrial calcium ions (Ca2+), structure, function and their relationship with PCD were compared. The results showed that compared with fresh pollen, the PCD of 'Feng Huang Nie Pan' was significantly reduced after cryopreservation. Their mitochondrial Ca2+ content decreased by 74.27%, mitochondrial permeability transition pore (MPTP) opening reduced by 25.41%, mitochondrial membrane potential slightly decreased by 5.02%, cardiolipin oxidation decreased by 65.31%, and oxygen consumption remained stable, with a slightly ATP production increase. On the contrary, compared with fresh pollen, 'Zi Feng Chao Yang' showed severe PCD after cryopreservation. The decline in mitochondrial Ca2+-ATPase activity led to an accumulation of excessive Ca2+ within mitochondria, triggering widespread opening of MPTP, significantly affecting mitochondrial respiration and energy synthesis. These results suggest the mitochondrial pathway of PCD exists in pollen cryopreservation.
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Affiliation(s)
- Wenjie Ma
- School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China; Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, Beijing 100083, China; Beijing Laboratory of Urban and Rural Ecological Environment, Beijing 100083, China; National Engineering Research Center for Floriculture, Beijing 100083, China
| | - Mengting Zhu
- School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China; Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, Beijing 100083, China; Beijing Laboratory of Urban and Rural Ecological Environment, Beijing 100083, China; National Engineering Research Center for Floriculture, Beijing 100083, China
| | - Yingling Wan
- School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China; Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, Beijing 100083, China; Beijing Laboratory of Urban and Rural Ecological Environment, Beijing 100083, China; National Engineering Research Center for Floriculture, Beijing 100083, China
| | - Hui Cai
- School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China; Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, Beijing 100083, China; Beijing Laboratory of Urban and Rural Ecological Environment, Beijing 100083, China; National Engineering Research Center for Floriculture, Beijing 100083, China
| | - Yue Sun
- Cell Biology Facility, Center of Biomedical Analysis, Tsinghua University, Beijing 100083, China
| | - Pengcheng Jiao
- Core Facility, Center of Biomedical Analysis, Tsinghua University, Beijing 100083, China
| | - Yan Liu
- School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China; Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, Beijing 100083, China; Beijing Laboratory of Urban and Rural Ecological Environment, Beijing 100083, China; National Engineering Research Center for Floriculture, Beijing 100083, China.
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Puzanskiy RK, Romanyuk DA, Kirpichnikova AA, Yemelyanov VV, Shishova MF. Plant Heterotrophic Cultures: No Food, No Growth. PLANTS (BASEL, SWITZERLAND) 2024; 13:277. [PMID: 38256830 PMCID: PMC10821431 DOI: 10.3390/plants13020277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 01/10/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024]
Abstract
Plant cells are capable of uptaking exogenous organic substances. This inherited trait allows the development of heterotrophic cell cultures in various plants. The most common of them are Nicotiana tabacum and Arabidopsis thaliana. Plant cells are widely used in academic studies and as factories for valuable substance production. The repertoire of compounds supporting the heterotrophic growth of plant cells is limited. The best growth of cultures is ensured by oligosaccharides and their cleavage products. Primarily, these are sucrose, raffinose, glucose and fructose. Other molecules such as glycerol, carbonic acids, starch, and mannitol have the ability to support growth occasionally, or in combination with another substrate. Culture growth is accompanied by processes of specialization, such as elongation growth. This determines the pattern of the carbon budget. Culture ageing is closely linked to substrate depletion, changes in medium composition, and cell physiological rearrangements. A lack of substrate leads to starvation, which results in a decrease in physiological activity and the mobilization of resources, and finally in the loss of viability. The cause of the instability of cultivated cells may be the non-optimal metabolism under cultural conditions or the insufficiency of internal regulation.
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Affiliation(s)
- Roman K. Puzanskiy
- Laboratory of Analytical Phytochemistry, Komarov Botanical Institute of the Russian Academy of Sciences, 197022 St. Petersburg, Russia;
| | - Daria A. Romanyuk
- Laboratory of Genetics of Plant-Microbe Interactions, All-Russia Research Institute for Agricultural Microbiology, 196608 St. Petersburg, Russia;
| | | | - Vladislav V. Yemelyanov
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (A.A.K.); (V.V.Y.)
| | - Maria F. Shishova
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (A.A.K.); (V.V.Y.)
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