Polyploidy as a strategy to improve the industrial quality of eucalypt wood

Souza, Tadeu Vilela de; Daolio, Marcela Faralhi; Mori, Fábio Akira; Ramalho, Magno Antônio Patto; Mingossi, Fabiana Bombonato; Missiaggia, A. A.; Techio, Vânia Helena

doi:10.1007/s00226-020-01236-8

Cited by 6 publications

(4 citation statements)

References 24 publications

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“…Tetraploid F. carica clones showed higher tolerance to water stress by maintaining relative water content while producing high levels of stress hormones, enhancing the enzymatic defense system, and adjusting osmotic pressure [60]. Polyploid eucalyptus hybrids are larger in size, have more fibers, and have thicker walls compared to diploid relatives [61]. It is also possible that tetraploid M. volkensii plants possess higher quantities of medicinal and biopesticides chemicals than diploid plants.…”

Section: Discussionmentioning

confidence: 99%

Production of Tetraploid Plants from Cotyledons of Diploid Melia volkensii Gürke

et al. 2023

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Polyploidy was induced in Melia volkensii (Mukau), a valuable native tree from the semi-arid regions of East Africa. Cotyledons of diploid M. volkensii (2n = 2x = 28) were treated with oryzalin for 0 (control), 1, 2, or 3 h with or without pretreatment with 1.1 µM thidiazuron. Cotyledons treated with 10 mg·L−1 oryzalin for three hours yielded 40% tetraploids. Pretreatment of cotyledons with thidiazuron for 18 days followed by treatment with oryzalin increased tetraploid plant production to 52.5%, but this also yielded more mixoploids. Compared to diploid M. volkensii, the tetraploid in vitro and young potted plants were compacter, with thicker stems, wider leaves, and a low density of longer and wider stomata. In the coming years, tetraploid M. volkensii plants will be observed in field trials and serve as a basis for further breeding efforts.

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Section: Discussionmentioning

confidence: 99%

Production of Tetraploid Plants from Cotyledons of Diploid Melia volkensii Gürke

et al. 2023

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“…Likewise, the tetraploid tree produced a larger seed and a higher flowering capacity than the diploid tree (Le et al, 2021). Additionally, da Silva Souza et al (2021) reported that polyploid Eucalyptus clones derived from the crosses of E. grandis × E. urophylla produced a longer and thicker cell wall of wood fibers than the diploids, thus increasing the fiber strength of the paper products.…”

Section: Accordingmentioning

confidence: 99%

THE EFFECTIVENESS OF COLCHICINE AND ORYZALIN ON POLYPLOIDY INDUCTION IN TEAK (Tectona grandis Linn. f.) IN VITRO

Fauzan,

Supriyanto,

Mulyono

et al. 2024

Ina.J.For.Res

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Indonesian government has launched a community plantation forests program that would be beneficial for remedying shortage in domestic demand for teak wood every year. This program needs to be supported by the availability of quality seeds resources and quality seedlings utilizing polyploid teak (Tectona grandis). Our study aimed to examine the effectiveness of colchicine and oryzalin to modify diploid into polyploid T. grandis based on growth response, morphological, anatomical and cytological alteration, as well as the acclimatization ability of polyploid plantlets. The materials used were aseptic lateral shoots consisting of nodal segments which were immersed in antimitotic agents at the concentration of 0, 15 and 30 μM for 5 days, then cultured on regeneration medium until the 8 weeks and followed by acclimatization. The results showed that colchicine at the concentration of 30 μM was the most effective to induce polyploidy of plantlets in the parameter of high growth rate, the length of internodes, the number of leaf plantlets and increase the leaf surface area and the significant chlorophyll index content compared to the control. Anatomical analysis of polyploid was characterized by increasing the leaf thickness, stomata size, decreased stomatal density and increased chloroplast content in guard cells. Based on cytological examination on polyploidy plantlet, there was an increased in the number of chromosomes in the cell nucleus. The acclimatization of polyploid successfully induced rooting and a 100% survival rate of grown plantlets. Polyploid seedlings were able to grow and well adapted to the new environment of acclimatization

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“…One of the goals of chromosome duplication is to obtain larger cells and, consequently, higher yields. Polyploid plants can also improve the quality of eucalyptus wood, enhancing its suitability for pulp and paper production (Souza et al 2021). Furthermore, successful breeding of diploids and tetraploids in the field will pave the way for triploid breeding and sterile seed production, an attractive possibility for the industry.…”

Section: Ts Souza Et Almentioning

confidence: 99%

Assessment of the cytogenetics and leaf anatomy of synthetic polyploids of Eucalyptus clones

Souza

Macedo

Ferreira

et al. 2023

Crop Breed. Appl. Biotechnol.

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The induction of polyploidy in Eucalyptus can lead to higher-yielding and more adapted clones, with better wood quality. After artificial polyploidization, it is necessary to certify the effectiveness of the process through cytogenetic analyses and anatomical trait evaluations. Thus, the aim of this study was to certify the chromosome duplication in artificially polyploidized clones of Eucalyptus grandis × Eucalyptus urophylla using cytogenetic analysis, flow cytometry, and leaf anatomy measurements. Chromosomal counts and DNA content estimation allowed the identification of artificially polyploidized clones and mixoploids. Polyploid clones had larger stomata diameter than diploids. The increase in stomata size was accompanied by lower stomatal density in most polyploid clones. The typical gigas effect of polyploidized plants was demonstrated by the expressive increase in leaf area in polyploid individuals compared to diploids. Our findings indicate that the use of polyploidy in Eucalyptus breeding is promising, allowing the discrimination of diploid, tetraploid, and mixoploid plants.

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Polyploidy as a strategy to improve the industrial quality of eucalypt wood

Cited by 6 publications

References 24 publications

Production of Tetraploid Plants from Cotyledons of Diploid Melia volkensii Gürke

Production of Tetraploid Plants from Cotyledons of Diploid Melia volkensii Gürke

THE EFFECTIVENESS OF COLCHICINE AND ORYZALIN ON POLYPLOIDY INDUCTION IN TEAK (Tectona grandis Linn. f.) IN VITRO

Assessment of the cytogenetics and leaf anatomy of synthetic polyploids of Eucalyptus clones

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