Comparative greenhouse study of Eucalyptus grandis in vitro plantlets and half-sib seedlings, II. Dry matter accumulation and relative distribution

Warrag, E. I.; Lesney, Mark S.; Rockwood, D. L.

doi:10.1007/bf00269059

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…Warrag et al (1989a) observed a higher growth rate and net photosynthesis of Eucalyptus grandis seedlings compared with tissue culture plants during the early stages of development, but differences decreased sharply within few months of continuous growth in the greenhouse. No advantage was found in terms of dry weight accumulation and distribution for seedlings or TC plants (Warrag et al, 1989b). In the present study, we did not compare growth rates of rootstock plants.…”

Section: Discussionmentioning

confidence: 59%

Influence of Propagation Method on Root Architecture and Other Traits of Young Citrus Rootstock Plants

Albrecht

Bordas²,

Lamb³

et al. 2017

horts

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There are generally inadequate supplies of seed for the newest rootstocks to satisfy the growing demand for the propagation material to be used in commercial citrus nurseries. Consequently, rootstock propagation, which is traditionally by seed, now often makes use of alternative methods such as cuttings and tissue culture (TC). Propagation through cuttings and TC will generate a root system that is largely composed of adventitious or lateral roots, compared with seed propagation, which will generally promote the formation of a well-defined taproot. In this study, we compared root architecture and growth of seven different rootstock plants, generated from seed, stem cuttings, or TC, during the early weeks of growth in the greenhouse. Based on total dry biomass, root mass fraction of plants generated from cuttings ranged from 11% to 16%, and from 16% to 29% and 21% to 30% for micropropagated plants and seedlings, respectively. Plants propagated through cuttings had the most primary roots (7–10), followed by tissue culture–propagated plants which developed an average of 2–6 primary roots. As expected, plants grown from seeds mostly developed a single and well-defined taproot during the first weeks. The total number of first order lateral roots was highest in the plants propagated as cuttings (108–185) compared with 53–103 and 43–78 for tissue culture–propagated plants and seedlings, respectively. Similarly, specific root length (SRL) was highest in plants derived from cuttings (21–43 m·g−1) and lowest in plants grown from seed (7–20 m·g−1). It is suggested that the larger number and length of roots on rootstock plants propagated through vegetative methods may be better suited for resource acquisition as compared with seed propagated plants.

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Section: Discussionmentioning

confidence: 59%

Influence of Propagation Method on Root Architecture and Other Traits of Young Citrus Rootstock Plants

Albrecht

Bordas²,

Lamb³

et al. 2017

horts

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“…This limitation was mainly related to the rooting difficulty shown by the cutting of hybrid clones (Hartney 1980;Jones and Van Staden 1994 ). Micropropagation methods have been proposed as an alternative and important strategy for the large-scale production of selected Eucalyptus (Warrag et al 1989) and other superior trees. However, the acclimatization process during the transfer of Eucalyptus plants from in vitro to ex vitro environments may lead to plant loss (Louro 1994); moreover, acclimatization has been shown to induce the death of about 60% of plants (Grout and Aston 1977;Fuchigami et al 1981).…”

Section: Introductionmentioning

confidence: 99%

Ultrastructure of Eucalyptus grandis × E. urophylla plants cultivated ex vitro in greenhouse and field conditions

Louro

Santiago

Santos

et al. 2002

Trees

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The young and expanded leaf micromorphology and ultrastructure of Eucalyptus grandis × E. urophylla juvenile plants, cultivated in greenhouse and field conditions, were analyzed by scanning and transmission electron microscopy. In greenhouse leaves epicuticular wax needles covered the abaxial and adaxial surfaces. On the adaxial surface, the needles form an atypical arrangement in lines, mainly over the anticlinal wall of epidermis cells. After plant transfer to field conditions, the organization of epicuticular wax was altered forming amorphous layers on the adaxial leaf surface, in contrast to the abaxial surface, which maintained the wax needle cover. In both culture conditions the lamellar cuticle formed on the young leaves surface disappeared during leaf enlargement. The ex vitro environment induced the development of hypostomatic leaves. The dorsiventral organization of greenhouse leaves was replaced by an isobilateral arrangement in field conditions with concomitant aerial space reduction. Results suggest that those structural changes may be some of the strategies to avoid excessive plant transpiration during Eucalyptus hybrid plants' acclimatization.

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“…Some reports indicate that in some perennials such as Eucalyptus grandis, there is a correlation in the accumulation of dry matter between seedlings of the mother plants and the micropropagated plants derived from them that suggests a genetic control of this trait (Warrag et al 1989).…”

Section: Resultsmentioning

confidence: 99%

No correlation between the growth of in vitro cultured Yucca valida clones and the growth of their mother plants in the field

Arce-Montoya

Hernandez-Gonzalez

Rodríguez-Álvarez

et al. 2006

Plant Cell Tiss Organ Cult

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Yucca valida is a close relative to Yucca schidigera and a potential alternative source of the steroidal saponins extracted from the tissues of the latter. The exploitation from the wild is not only inefficient but endangers the natural populations and an alternative to these would be their domestication and establishment of commercial plantations. Both species have a long life span cycle and low growth rates affected by environmental conditions that make it difficult to select fast growing, high yield elite individuals for cloning purposes. Here, we report the in vitro establishment and propagation of mature Y. valida plants derived from seed that showed very different growth rates in an experimental field and their propagative and growth characteristics in vitro. No correlation was found between the growth of field cultivated plants and the relative increase of fresh (FW) or dry weight (DW) of in vitro cultured plants.

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Comparative greenhouse study of Eucalyptus grandis in vitro plantlets and half-sib seedlings, II. Dry matter accumulation and relative distribution

Cited by 12 publications

References 8 publications

Influence of Propagation Method on Root Architecture and Other Traits of Young Citrus Rootstock Plants

Influence of Propagation Method on Root Architecture and Other Traits of Young Citrus Rootstock Plants

Ultrastructure of Eucalyptus grandis × E. urophylla plants cultivated ex vitro in greenhouse and field conditions

No correlation between the growth of in vitro cultured Yucca valida clones and the growth of their mother plants in the field

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