Transcriptional and post-transcriptional responses of diploid and autotetraploid Paulownia tomentosa × Paulownia fortunei under water-deficit condition

There is a growing trend in the world of planting fast growing species (rotations 5 to 10 years). Their primary purpose is the production of wood fibers and biomass, but they certainly represent the potential in making solid wood products as well. One of the fast-growing species is Paulownia sp., a species of extremely fast growing wood. Plantation breeding of Paulownia sp. in Croatia is increasing, although there is a little knowledge about the technical properties of Paulownia wood and its end use is questionable. This paper presents preliminary results of some physical properties of juvenile wood of two Paulownia hybrids planted in the area near the town of Glina in the Republic of Croatia. One hybrid is 9501 ((Paulownia fortunei × Paulownia elongata) × (Paulownia fortunei × Paulownia tomentosa)) and the other hybrid is Shan Tong (Paulownia fortunei × Paulownia tomentosa). The aim of this study was to investigate physical properties of juvenile wood of two Paulownia hybrids from one site in Croatia, to determine differences in physical properties of wood between two hybrids and to evaluate the correlation between density and shrinkages of each hybrid. Significant differences in oven dry density, basic density and density at maximum MC, between the two hybrids were determined. There is no statistically significant difference in longitudinal, radial, tangential and volumetric shrinkages between the two hybrids.

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Physiological and PIP Transcriptional Responses to Progressive Soil Water Deficit in Three Mulberry Cultivars

Frontiers in Plant Science ◽

10.3389/fpls.2020.01310 ◽

2020 ◽

Vol 11 ◽

Author(s):

Xu Cao ◽

Qiudi Shen ◽

Sang Ma ◽

Li Liu ◽

Jialing Cheng

Keyword(s):

Soil Water ◽

Water Deficit ◽

Soil Water Deficit ◽

Transcriptional Responses

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Plant–Pathogen Interaction-Related MicroRNAs and Their Targets Provide Indicators of Phytoplasma Infection in Paulownia tomentosa × Paulownia fortunei

PLoS ONE ◽

10.1371/journal.pone.0140590 ◽

2015 ◽

Vol 10 (10) ◽

pp. e0140590 ◽

Cited By ~ 11

Author(s):

Guoqiang Fan ◽

Suyan Niu ◽

Tong Xu ◽

Minjie Deng ◽

Zhenli Zhao ◽

...

Keyword(s):

Plant Pathogen ◽

Paulownia Tomentosa ◽

Plant Pathogen Interaction ◽

Phytoplasma Infection ◽

Paulownia Fortunei

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Phytobiome and Transcriptional Adaptation of Populus deltoides to Acute Progressive Drought and Cyclic Drought

Phytobiomes Journal ◽

10.1094/pbiomes-04-18-0021-r ◽

2018 ◽

Vol 2 (4) ◽

pp. 249-260 ◽

Cited By ~ 6

Author(s):

Benjamin J. Garcia ◽

Jessy L. Labbé ◽

Piet Jones ◽

Paul E. Abraham ◽

Ian Hodge ◽

...

Keyword(s):

Water Deficit ◽

Populus Deltoides ◽

Drought Response ◽

Severe Drought ◽

Transcriptional Responses ◽

Disease Response ◽

Beneficial Effects ◽

Ros Metabolism ◽

Transcriptional Adaptation ◽

Species Specific

Plant drought stress causes systematic changes to photosynthesis, metabolism, growth, and potentially the phytobiome. Additionally, drought affects plants in both a species-specific and water-deficit-driven manner, causing the response to drought to be dependent both on how drought is being experienced and on any adaptation to prior drought exposure. Thus, understanding the effect of drought on plants requires assessing drought response in multiple conditions, such as progressive acute drought and recurrent cyclic drought, and at different levels of severity. In this study, we have utilized RNA sequencing to identify changes to the plant transcriptome and the phytobiome during both acute progressive drought and cyclic drought at multiple severities. Co-analysis of the plant and phytobiome, utilizing the same RNAseq data, allows for the identification of novel associations that would not be possible otherwise. We have identified that the drought response ranges from increased transcripts related to photosynthesis and metabolic activity in mild acute drought to decreased transcripts related to photosynthesis and metabolic impairment in severe drought. Moreover, while water deficit is a main driver of transcriptional responses in severe drought, there are increases in reactive oxygen species (ROS) metabolism and photosynthetic transcripts in cyclic severe drought compared with acute severe drought, independent of water deficit. The phytobiome exhibits alternate responses to drought when compared with the transcriptome. Specifically, the phytobiome is affected more by the cyclic or acute nature of the drought rather than the severity of the drought, with the phytobiome having an increase in taxa under cyclic drought that are often reported to have beneficial effects on the plants. Lastly, we have identified associations between taxa in the phytobiome with expression of disease response, ROS metabolism, and photosynthesis transcripts suggesting interplay between the host plant and its phytobiome in response to drought.

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In Vitro Propagation Protocols and Variable Cost Comparison in Commercial Production for Paulownia tomentosa × Paulownia fortunei Hybrid as a Renewable Energy Source

Applied Sciences ◽

10.3390/app9112272 ◽

2019 ◽

Vol 9 (11) ◽

pp. 2272

Author(s):

Mariusz Pożoga ◽

Dawid Olewnicki ◽

Lilianna Jabłońska

Keyword(s):

In Vitro Propagation ◽

Commercial Production ◽

Cost Comparison ◽

Ms Medium ◽

Light Conditions ◽

Paulownia Tomentosa ◽

Half Strength ◽

Paulownia Fortunei ◽

Reduced Light

In this elaboration, effective methods of in vitro propagation of a Paulownia tomentosa × Paulownia fortunei hybrid are presented, and the variable costs of commercial production evaluated. Plant regeneration of the P. tomentosa × P. fortunei hybrid was achieved through organogenesis in nodal explants. Different concentrations of BAP (6-benzylaminopurine), 0.2, 0.5, 1 mg/L, and light conditions were investigated. The best results were obtained using a half-strength MS medium containing 0.5 mg/L BAP. In standard light conditions, 2 shoots were grown with 3.5 culturable nodes on each, and in 70% reduced light, 2 new shoots were grown with 6 culturable nodes on each. Rooting was successfully achieved when using a hormone-free half-strength MS medium containing vitamin, and 2% sucrose with 95% efficiency. Acclimatization and survival were shown to be 90% in regenerated plants. The cost of production of a single plant of P. tomentosa × P.fortunei hybrid grown in standard light conditions was $0.084 and $0.082 when grown in 70% reduced light where only variable costs were considered. Two major factors affecting P. tomentosa × P fortunei hybrid micropropagation is labor, materials and chemicals. Focusing on reducing this cost can highly lower plantlet price.

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Utjecaj ektomikorize i huminskih kiselina na morfološke značajke jednogodišnjih sadnica hibrida Paulownia tomentosa x Paulownia fortunei

Šumarski list ◽

10.31298/sl.140.7-8.1 ◽

2016 ◽

Vol 140 (7-8) ◽

pp. 337-337

Author(s):

Damir Drvodelić ◽

Milan Oršanić ◽

Vinko Paulić

Keyword(s):

Humic Acids ◽

Ectomycorrhizal Fungi ◽

Ground Level ◽

Morphological Features ◽

Stem Diameter ◽

Seedling Height ◽

Paulownia Tomentosa ◽

Paulownia Fortunei ◽

Planting Distance ◽

Number Of Branches

The paper presents the results of the impact of ectomycorrhiza and humic acids on major morphological features of 1 year old seedlings of Paulownia tomentosa × Paulownia fortunei (9501) hybrids grown from root cuttings. Paulownia has many desirable properties as well as negative traits such as invasiveness. Experimental plantations were established in the spring of 2015 on a field in Zagreb. We used two different spacings (2x2 m and 4x4 m), each with two treatments and control. In the first treatment we planted seedlings grown from root cuttings inoculated with ectomycorrhizal fungi at the time of planting. For the second treatment we used the inoculated plants with the addition of soil humic acids. Seedlings were planted in flower beds with black plastic foil and a trickle irrigation system. Major morphological features of seedlings were measured at the end of the first growing season. A positive impact of the ectomycorrhizal fungi and humic acids on morphological characteristics of 1 year old seedlings was established. For the planting distance 2x2 m we established significant differences between the seedlings treated with ectomycorrhizal fungi and seedlings treated with ectomycorrhizal fungi and humic acids compared to the control seedlings in the following variables: total seedling height, stem diameter at 10 cm from ground level, number of branches, seedling height to the first live branches and length of the longest branches. For the planting distance 4x4 m we obtained statistically significant differences between the seedlings treated with ectomycorrhizal fungi compared to the control seedlings in the following variables: stem diameter at 10 cm from ground level, the number of branches and the length of the longest branches. The application of ectomycorrhizal fungi and humic acids can increase the quality of forest plantation of paulownia. Before growing and putting paulownia seedlings on the market we should consider the fact that in Croatia there are no scientific or impact studies on the nature of several species from the genus Paulownia, and the risks should be assessed for each taxonomy category, even lower than the species. Such studies would give specific guidelines and plans for future plantations of paulownia.

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