Differences in root growth of &lt;i&gt;Quercus ilex&lt;/i&gt; and &lt;i&gt;Quercus suber&lt;/i&gt; seedlings infected with &lt;i&gt;Phytophthora cinnamomi&lt;/i&gt;

León, Isabel; Garcı́a, J.J.; Fernández, M.; Vázquez‐Piqué, Javier; Tapias, R.

doi:10.14214/sf.6991

Cited by 14 publications

(10 citation statements)

References 27 publications

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“…At 15 dpi, Inoculated plants had recovered their photosynthetic activity, their Gs and QY being equal to those of "Control" plants at 30 dpi, but plants of the "I × D" treatment did not exhibit photosynthetic activity after 22 dpi. Other works obtained similar results when inoculated plants were not subjected to acute water stress, without important changes in physiology, nor mortality of seedlings [15,19,45]. Turco et al [21] did not find changes in the final physiological status of Q. ilex seedlings due to P. cinnamomi infection under slight drought conditions.…”

Section: Physiological Changesmentioning

confidence: 72%

Differences in the Response to Acute Drought and Phytophthora cinnamomi Rands Infection in Quercus ilex L. Seedlings

Gómez

Pérez‐de‐Luque

Sánchez‐Cuesta

et al. 2018

Forests

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The sustainability of “dehesas” is threatened by the Holm oak decline. It is thought that the effects of root rot on plant physiology vary depending on external stress factors. Plant growth and biomass allocation are useful tools to characterize differences in the response to drought and infection. The study of physiological responses together with growth patterns will clarify how and to what extent root rot is able to damage the plant. A fully factorial experiment, including drought and Phytophtora cinnamomi Rands infection as factors, was carried out with Quercus ilex L. seedlings. Photosynthesis, biomass allocation and root traits were assessed. Photosynthetic variables responded differently to drought and infection over time. The root mass fraction showed a significant reduction due to infection. P. cinnamomi root rot altered the growth patterns. Plants could not recover from the physiological effects of infection only when the root rot coincided with water stress. Without additional stressors, the strategy of our seedlings in the face of root rot was to reduce the biomass increment and reallocate resources. Underlying mechanisms involved in plant-pathogen interactions should be considered in the study of holm oak decline, beyond the consideration of water stress as the primary cause of tree mortality.

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Section: Physiological Changesmentioning

confidence: 72%

Differences in the Response to Acute Drought and Phytophthora cinnamomi Rands Infection in Quercus ilex L. Seedlings

Gómez

Pérez‐de‐Luque

Sánchez‐Cuesta

et al. 2018

Forests

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“…This has been confirmed in some studies where significant differences in water potential, stomatal conductance, and photosynthesis occurred following P. cinnamomi infection [32,33]. However, other studies did not find a significant effect of P. cinnamomi infection on plant water relations [34][35][36]. Furthermore, it has been suggested that drought events might worsen the impacts of Phytophthora infection on plants by lowering the plant resistance [28] or increasing the inoculum production and infection rate [37,38].…”

Section: Introductionmentioning

confidence: 78%

The Impacts of Drought Stress and Phytophthora cinnamomi Infection on Short-Term Water Relations in Two Year-Old Eucalyptus obliqua

Umami

Parker

Arndt

2021

Forests

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The effects of drought stress, Phytophthora cinnamomi infection and their interaction on water relations and growth were examined for 28 days on two year-old potted trees of Eucalyptus obliqua (L’Hér.). There were significant effects of drought stress on plant photosynthesis, stomatal conductance, biomass accumulation, plant water potential at turgor loss point and the bulk modulus of elasticity. E. obliqua was successfully infected but the trees showed only mild symptoms. Infection with P. cinnamomi led to a significant reduction in the root biomass and root-to-shoot ratio in well-watered and droughted plants but did not impact water relations. There was no observable cumulative effect of drought and P. cinnamomi infection. There are multiple potential reasons why P. cinnamomi infection did not lead to drought-like symptoms in E. obliqua, including short experimental duration, delayed infection symptoms, potential resistance of E. obliqua and a possible lower aggressiveness of the P. cinnamomi strain. Hence, our results indicate that P. cinnamomi infection will not always lead to immediate short-term symptoms, and that plants that are mildly symptomatic respond very similar to drought stress compared to non-infected trees.

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“…The root renewal rate in young cork oak plants seems to have a great influence on their survival (León et al., ; Moreira et al., ; Moreira‐Marcelino, ) and so better soil conditions following ploughing possibly contributed for root renewal and development.…”

Section: Discussionmentioning

confidence: 99%

“…In cork oak plants, the rate of root renewal seems to have a great influence on their survival (León, García, Fernández, Vázquez-Piqué, & Tapias, 2017;Moreira, Ferraz, & Clegg, 1999;Moreira-Marcelino, 2001) so that the best conditions for root development are also the most favourable to escape the disease. Indeed, an early development of a taproot system appears to be an important trait in the tree's ecological survival strategy to biotic agents, especially under drought conditions (Serrasolses et al, 2009).…”

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confidence: 99%

Field susceptibility of cork oak trees with different provenances to Phytophthora cinnamomi

et al. 2018

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Cork oak decline has been a serious problem in Portuguese central and southern areas in the last 30 years. This decline is associated with Phytophthora cinnamomi, a pathogen with a major impact on cork oak decline. A programme aiming the plant selection on resistance, to address the infection of soilborne P. cinnamomi in cork oak woodlands, should therefore be fundamental for an integrated strategy for the management of the cork oak woodlands. In this context, the main objective of this study was to select potential tolerant families by evaluation of field susceptibility to the pathogen. During 10 years (2004–2014), the survival and height growth of 157 cork oak families from eight different provenances from Portugal and Spain were assessed in a field highly infested with P. cinnamomi. Results showed a high mortality of the plants, over the whole period, insofar that only 14 families, out of the 157, showed a survival rate between 40% and 60%. These families exhibited also a good height growth with heights ranging between 1 and 1.50 m. It was also observed that ploughing, leading to better soil conditions, could contribute to improve the survival rate and the development of plants. Potential families of cork oak were identified as tolerant plant material and rootstock, thereby candidates to be used in restoration and reforestation. Interestingly, additional results concerning a Quercus faginea family evidenced a good resistance of this species to the pathogen. This information is indicative that Q. faginea could be used as a rootstock for the cork oak reforestation in areas where the pathogen had high impact.

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Differences in root growth of <i>Quercus ilex</i> and <i>Quercus suber</i> seedlings infected with <i>Phytophthora cinnamomi</i>

Cited by 14 publications

References 27 publications

Differences in the Response to Acute Drought and Phytophthora cinnamomi Rands Infection in Quercus ilex L. Seedlings

Differences in the Response to Acute Drought and Phytophthora cinnamomi Rands Infection in Quercus ilex L. Seedlings

The Impacts of Drought Stress and Phytophthora cinnamomi Infection on Short-Term Water Relations in Two Year-Old Eucalyptus obliqua

Field susceptibility of cork oak trees with different provenances to Phytophthora cinnamomi

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