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Pan T, Chen XL, Hao YP, Jiang CW, Wang S, Wang JS, Wei Q, Chen SJ, Yu XS, Cheng F, Xu LY. Optimization of factors affecting the rooting of pine wilt disease resistant Masson pine (Pinus massoniana) stem cuttings. PLoS One 2021; 16:e0251937. [PMID: 34506505 PMCID: PMC8432847 DOI: 10.1371/journal.pone.0251937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 05/05/2021] [Indexed: 12/04/2022] Open
Abstract
Pine wilt disease (PWD) is a devastating disease affecting trees belonging to the genus Pinus. To control the spread of PWD in the Masson pine forest in China, PWD resistant Masson pine clones have been selected by the Anhui Academy of Forestry. However, because Masson pine is a difficult-to-root species, producing seedlings is challenging, especially from trees older than 5 years of age, which impedes the application of PWD resistant clones. In this study, we investigated the factors affecting rooting of PWD resistant clones and established a cheap, reliable, and simple method that promotes rooting. We tested the effects of three management methods, four substrates, two cutting materials, two cutting treatments, and three collection times on the rooting of cuttings obtained from 9-year-old PWD resistant clones. Rooting was observed only in stem cuttings treated with the full-light automatic spray management method. Additionally, stem cuttings showed a significantly higher rooting rate and root quality than needles cuttings. Compared with other substrates, stem cuttings planted in perlite produced the longest adventitious root and the highest total root length and lateral root number. Moreover, stem cuttings of PWD resistant clones collected in May showed a significantly higher rooting rate and root quality than those collected in June and July. Moreover, stem cuttings prepared with a horizontal cut while retaining the needles showed significantly higher rooting rate and root quality than those prepared with a diagonal cut while partly removing the needles. This study promotes the reproduction of seedlings of PWD-resistant Masson pine clones which helps control the spread of PWD, meanwhile, provides a technical reference for the propagation of mature pine trees via cuttings.
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Affiliation(s)
- Ting Pan
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
- Key Laboratory of State Forestry Administration on Prevention and Control of Pine Wood Nematode Disease, Hefei, Anhui, China
| | - Xue-lian Chen
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
- Key Laboratory of State Forestry Administration on Prevention and Control of Pine Wood Nematode Disease, Hefei, Anhui, China
| | - Yan-ping Hao
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
- Key Laboratory of State Forestry Administration on Prevention and Control of Pine Wood Nematode Disease, Hefei, Anhui, China
| | - Chun-wu Jiang
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
- Key Laboratory of State Forestry Administration on Prevention and Control of Pine Wood Nematode Disease, Hefei, Anhui, China
| | - Song Wang
- Washan State-own Forest Farm in Quanjiao, Chuzhou, Anhui, China
| | - Jin-shan Wang
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
| | - Qiang Wei
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
- Key Laboratory of State Forestry Administration on Prevention and Control of Pine Wood Nematode Disease, Hefei, Anhui, China
| | - Shi-juan Chen
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
| | - Xiao-song Yu
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
| | - Feng Cheng
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
| | - Liu-yi Xu
- Department of Forest Tree Genetic Breeding, Anhui Forestry Academy, Anhui, China
- Key Laboratory of State Forestry Administration on Prevention and Control of Pine Wood Nematode Disease, Hefei, Anhui, China
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