Somatic embryogenesis (SE) has high potential for large-scale clonal propagation of conifers. Different types of bioreactor cultures have been tested for the conifer SE process where the temporary immersion bioreactors (TIBs) have proved to be useful across the different developmental steps of the SE process. In the present study the use of TIBs was tested for hybrid larch ( × Henry) The results showed two-fold increases in both fresh weight (FW) of pro-embryogenic masses (PEMs) and yield of cotyledonary embryos in the TIBs compared to solid medium in plates. For the germination phase, the highest number of roots per plant, the root length and height of plants were also obtained in the TIBs. The results show that the TIB system can be successfully used to support scale up of plant production in all steps of the SE process from proliferation to germination of hybrid larch ( × Henry).
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http://dx.doi.org/10.1016/j.btre.2021.e00684 | DOI Listing |
Plants (Basel)
October 2024
State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China.
Somatic embryogenesis is valuable for clonal propagation and genetic improvement, and it also serves as an ideal system for studying plant development mechanisms. In , microRNA171 and its target gene (), which has two alternative splicing variants, can regulate somatic embryogenesis; however, the underlying molecular mechanism is still unknown. In this study, we overexpressed these two variants in and and then used the RNA-Seq method to screen genes from and , whose expression patterns are related to those of variants.
View Article and Find Full Text PDFBMC Genomics
March 2024
State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 150040, Harbin, China.
Background: Larch is an important component of northern forests and a major cultivated tree species in restoration of forest cover using improved seed material. In recent years, the continuous low seed production has severely affected the production of improved variety seedlings and natural regeneration. However, research on the reproductive growth of gymnosperms is extremely scarce.
View Article and Find Full Text PDFInt J Mol Sci
January 2024
State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China.
Larch is widely distributed throughout the world and is an important species for timber supply and the extraction of industrial raw materials. In recent years, the hybrid breeding of and has shown obvious heterosis in quick-growth, stress resistance and wood properties. However, its growth and development cycle is too long to meet general production needs.
View Article and Find Full Text PDFMol Plant Microbe Interact
March 2024
Chemistry, Biochemistry, and Physics Department, Université du Québec à Trois-Rivières, Trois-Rivières, G8Z 4M3, Canada.
The poplar rust fungus is part of one of the most devastating group of fungi (Pucciniales) and causes important economic losses to the poplar industry. Because is a heteroecious obligate biotroph, its spread depends on its ability to carry out its reproductive cycle through larch and then poplar parasitism. Genomic approaches have identified more than 1,000 candidate secreted effector proteins (CSEPs) from the predicted secretome of that are potentially implicated in the infection process.
View Article and Find Full Text PDFPhysiol Plant
November 2023
INRAE, ONF, BioForA, Orléans, France.
The morphology of somatic embryos (SE) is not a sufficient criterion to determine the level of maturation and the optimal stage to transfer embryos for germination, unlike the biochemical components. This composition characterization in the laboratory is too restrictive to be considered at each maturation cycle, as would be necessary. It is, therefore, essential to consider alternative methods.
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