Analysis of differences in field performance of vegetatively and seed-propagated<i>Eucalyptus</i>varieties I: survival and leaf gas exchange

Mokotedi, M. E. O.; Watt, M. P.; Pammenter, N. W.

doi:10.2989/sf.2009.71.4.3.1030

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…Resistance to wind-induced uprooting of citrus trees grown under the present production system in Florida is mainly determined by the root distribution and anchorage in the upper areas of the soil, which our results suggest is influenced more by the rootstock cultivar than the method of propagation. However, in field-grown Eucalyptus trees, a higher vertical uprooting resistance was observed in seed-propagated than micropropagated plants, which had a larger number of lateral roots (Mokotedi et al, 2010). In contrast, our study observed no difference in the number of lateral roots attributed to the propagation method.…”

Section: Factorscontrasting

confidence: 87%

Horticultural Attributes and Root Architectures of Field-grown ‘Valencia’ Trees Grafted on Different Rootstocks Propagated by Seed, Cuttings, and Tissue Culture

Pokhrel¹,

Meyering²,

Bowman³

et al. 2021

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Huanglongbing (HLB) is a devastating disease of citrus that is found in most citrus production areas around the world. The bacterium associated with HLB resides in and damages the phloem, restricting the movement of photosynthates throughout the plant and leading to tree decline. Considerable root loss can be observed in affected trees even when few disease symptoms are visible aboveground. Root traits can substantially influence tree performance and use of superior rootstocks is one strategy to manage tree health and reduce production losses in a disease-endemic environment. Citrus rootstocks are typically propagated by seed, but due to the increased demand for some of the best-performing cultivars, propagation by other methods is being used to overcome seed shortages. In this research, differences in root architecture and root growth of six different rootstocks propagated by seed, cuttings, and tissue culture, and their influence on the grafted ‘Valencia’ (Citrus sinensis) scion were investigated. A field trial was established in southwest Florida in 2017. Trees were evaluated for their performance during the first 2 years after planting and a subset of trees was excavated for detailed analysis of root architectures and biomass distribution. Significant differences among propagation methods were found for the rootstock trunk diameter and the lateral (structural) root length, which were largest in seed-propagated rootstocks. Most of the other horticultural and root architectural traits were not significantly influenced by the rootstock-propagation method; however, many of the measured variables were significantly influenced by the rootstock cultivar regardless of the propagation method. The results showed that rootstocks propagated by cuttings and tissue culture were similar to seed-propagated rootstocks in their influence on the grafted tree during the early years of growth in the field.

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Section: Factorscontrasting

confidence: 87%