The Impacts of Drought Stress and <i>Phytophthora cinnamomi</i> Infection on Short-Term Water Relations in Two Year-Old <i>Eucalyptus obliqua</i>
The effects of drought stress, <i>Phytophthora cinnamomi</i> infection and their interaction on water relations and growth were examined for 28 days on two year-old potted trees of <i>Eucalyptus obliqua</i> (L’Hér.). There were significant effects of drought stress on plant p...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Forests |
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| Online Access: | https://www.mdpi.com/1999-4907/12/2/109 |
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| author | Mashlahatul Umami Linda M. Parker Stefan K. Arndt |
| author_facet | Mashlahatul Umami Linda M. Parker Stefan K. Arndt |
| author_sort | Mashlahatul Umami |
| collection | DOAJ |
| description | The effects of drought stress, <i>Phytophthora cinnamomi</i> infection and their interaction on water relations and growth were examined for 28 days on two year-old potted trees of <i>Eucalyptus obliqua</i> (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. <i>E. obliqua</i> was successfully infected but the trees showed only mild symptoms. Infection with <i>P. cinnamomi</i> 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 <i>P. cinnamomi</i> infection. There are multiple potential reasons why <i>P. cinnamomi</i> infection did not lead to drought-like symptoms in <i>E. obliqua</i>, including short experimental duration, delayed infection symptoms, potential resistance of <i>E. obliqua</i> and a possible lower aggressiveness of the <i>P. cinnamomi</i> strain. Hence, our results indicate that <i>P. cinnamomi</i> 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. |
| first_indexed | 2024-03-09T04:16:27Z |
| format | Article |
| id | doaj.art-9a8081ab19e441d6a1aeffd02e903fff |
| institution | Directory Open Access Journal |
| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-03-09T04:16:27Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Forests |
| spelling | doaj.art-9a8081ab19e441d6a1aeffd02e903fff2023-12-03T13:53:09ZengMDPI AGForests1999-49072021-01-0112210910.3390/f12020109The Impacts of Drought Stress and <i>Phytophthora cinnamomi</i> Infection on Short-Term Water Relations in Two Year-Old <i>Eucalyptus obliqua</i>Mashlahatul Umami0Linda M. Parker1Stefan K. Arndt2School of Ecosystem and Forest Sciences, The University of Melbourne, 500 Yarra Boulevard, Burnley, VIC 3121, AustraliaSchool of Ecosystem and Forest Sciences, The University of Melbourne, 500 Yarra Boulevard, Burnley, VIC 3121, AustraliaSchool of Ecosystem and Forest Sciences, The University of Melbourne, 500 Yarra Boulevard, Burnley, VIC 3121, AustraliaThe effects of drought stress, <i>Phytophthora cinnamomi</i> infection and their interaction on water relations and growth were examined for 28 days on two year-old potted trees of <i>Eucalyptus obliqua</i> (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. <i>E. obliqua</i> was successfully infected but the trees showed only mild symptoms. Infection with <i>P. cinnamomi</i> 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 <i>P. cinnamomi</i> infection. There are multiple potential reasons why <i>P. cinnamomi</i> infection did not lead to drought-like symptoms in <i>E. obliqua</i>, including short experimental duration, delayed infection symptoms, potential resistance of <i>E. obliqua</i> and a possible lower aggressiveness of the <i>P. cinnamomi</i> strain. Hence, our results indicate that <i>P. cinnamomi</i> 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.https://www.mdpi.com/1999-4907/12/2/109drought<i>Phytophthora</i><i>Eucalyptus</i>diebackplant water relations |
| spellingShingle | Mashlahatul Umami Linda M. Parker Stefan K. Arndt The Impacts of Drought Stress and <i>Phytophthora cinnamomi</i> Infection on Short-Term Water Relations in Two Year-Old <i>Eucalyptus obliqua</i> Forests drought <i>Phytophthora</i> <i>Eucalyptus</i> dieback plant water relations |
| title | The Impacts of Drought Stress and <i>Phytophthora cinnamomi</i> Infection on Short-Term Water Relations in Two Year-Old <i>Eucalyptus obliqua</i> |
| title_full | The Impacts of Drought Stress and <i>Phytophthora cinnamomi</i> Infection on Short-Term Water Relations in Two Year-Old <i>Eucalyptus obliqua</i> |
| title_fullStr | The Impacts of Drought Stress and <i>Phytophthora cinnamomi</i> Infection on Short-Term Water Relations in Two Year-Old <i>Eucalyptus obliqua</i> |
| title_full_unstemmed | The Impacts of Drought Stress and <i>Phytophthora cinnamomi</i> Infection on Short-Term Water Relations in Two Year-Old <i>Eucalyptus obliqua</i> |
| title_short | The Impacts of Drought Stress and <i>Phytophthora cinnamomi</i> Infection on Short-Term Water Relations in Two Year-Old <i>Eucalyptus obliqua</i> |
| title_sort | impacts of drought stress and i phytophthora cinnamomi i infection on short term water relations in two year old i eucalyptus obliqua i |
| topic | drought <i>Phytophthora</i> <i>Eucalyptus</i> dieback plant water relations |
| url | https://www.mdpi.com/1999-4907/12/2/109 |
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