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Article ; Online: Quantitative trait loci mapping of polyphenol metabolites from a 'Latham' x 'Glen Moy' red raspberry (Rubus idaeus L) cross.

McDougall, G J / Allwood, J W / Dobson, G / Austin, C / Verrall, S / Alexander, C J / Hancock, R D / Graham, J / Hackett, C A

Metabolomics : Official journal of the Metabolomic Society

2023 Volume 19, Issue 8, Page(s) 71

Abstract: ... accumulation in red raspberry (Rubus idaeus L).: Methods: The levels of total anthocyanins and 37 individual ...

Abstract	Objective: The objective of this study was to investigate the genetic control of polyphenol accumulation in red raspberry (Rubus idaeus L). Methods: The levels of total anthocyanins and 37 individual polyphenol metabolites were measured over three years in a raspberry biparental mapping population. Quantitative trait loci (QTLs) for these traits were mapped onto a high-density SNP linkage map. Results: At least one QTL was detected for each trait, with good consistency among the years. On four linkage groups (LG), there were major QTLs affecting several metabolites. On LG1, a QTL had large effects on anthocyanins and flavonols containing a rutinoside or rhamnose group. On LG4, a QTL had large effects on several flavonols and on LG5 and LG6 QTLs had large effects on ellagic acid derivatives. Smaller QTLs were found on LG2 and LG3. Conclusion: The identification of robust QTLs for key polyphenols in raspberry provides great potential for marker-assisted breeding for improved levels of potentially health beneficial components.
MeSH term(s)	Quantitative Trait Loci/genetics ; Rubus/genetics ; Polyphenols ; Anthocyanins ; Metabolomics ; Flavonols
Chemical Substances	Polyphenols ; Anthocyanins ; Flavonols
Language	English
Publishing date	2023-08-08
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2250617-2
ISSN	1573-3890 ; 1573-3882
ISSN (online)	1573-3890
ISSN	1573-3882
DOI	10.1007/s11306-023-02033-7
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Article ; Online: Hormone profiling in artificially induced ‘crumbly’ fruit in raspberry (Rubus idaeus L.) at two different development stages

Scolari, Luca M. / Hancock, Robert D. / Graham, Julie / Freitag, Sabine / Verrall, Susan / Moreno-Mellado, Amanda R. / Allwood, J. William

The Journal of Horticultural Science and Biotechnology. 2023 May 04, v. 98, no. 3 p.384-393

2023

Abstract: In red raspberry, a condition known as ‘crumbly’ fruit causes the formation of misshapen fruits with drupelets reduced in number but enlarged in size. Complex fruits such as those of raspberry, formed by the aggregation of many fertilised ovaries, ... ...

Abstract	In red raspberry, a condition known as ‘crumbly’ fruit causes the formation of misshapen fruits with drupelets reduced in number but enlarged in size. Complex fruits such as those of raspberry, formed by the aggregation of many fertilised ovaries, require a regulating mechanism to coordinate and synchronise their growth and development. The receptacle was hypothesised as the leading hub that, by means of hormonal crosstalk with the fertilised ovaries, regulates the fruit growth process. Experiments were designed to perturb the regulating system by damaging the receptacle of hand pollinated flowers of the floricane-fruiting variety Glen Ample to produce artificially crumbly fruits. Hormone profiling was performed in control and artificially induced crumbly fruit samples at two stages of development green developing fruit and red ripe fruit. Of the hormones that could be adequately detected and quantified, abscisic acid (ABA) was elevated in the receptacle of crumbly samples at both developmental stages while SA was higher only in green fruit receptacles. In the druplets, trans-zeatin (tZ) concentration was greater in green than red fruit but the crumbly treatment did not influence content. The data highlight a potential role for these three phytohormones in the development of misshapen ‘crumbly-like’ fruits.
Keywords	Rubus idaeus ; abscisic acid ; biotechnology ; floricanes ; fruiting ; fruits ; growth and development ; horticulture ; raspberries ; Rubus idaeus L. ; drupelet ; receptacle ; artificially induced crumbly fruits ; LC-MS ; phytohormones
Language	English
Dates of publication	2023-0504
Size	p. 384-393.
Publishing place	Taylor & Francis
Document type	Article ; Online
ZDB-ID	1416403-6
ISSN	2380-4084 ; 1462-0316
ISSN (online)	2380-4084
ISSN	1462-0316
DOI	10.1080/14620316.2022.2141140
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Article: Photosynthetic plasticity allows blueberry (Vaccinium corymbosum L.) plants to compensate for yield loss under conditions of high sink demand

Petridis, Antonios / van der Kaay, Jeroen / Sungurtas, Julie / Verrall, Susan R / McCallum, Susan / Graham, Julie / Hancock, Robert D

Environmental and experimental botany. 2020 June, v. 174

2020

Abstract: In some growing environments blueberry (Vaccimium corymbosum L.) yields exhibit excessive annual ...

Abstract	In some growing environments blueberry (Vaccimium corymbosum L.) yields exhibit excessive annual variation associated with poor photosynthetic performance. The purpose of this study was to determine how photosynthesis may be affected by demand and to define the mechanisms underpinning photosynthetic plasticity. Manipulation of source-sink ratios revealed that yields were maintained following 50 % defoliation. This was associated with an adaptive increase in photosynthetic capacity mediated via changes in stomatal physiology, photosynthetic electron transport and CO₂ assimilation. Transcripts encoding enzymes of the Calvin-Benson cycle including the Rubisco large subunit, Rubisco activase, phosphoribulokinase and plastid-localised glyceraldehyde phosphate dehydrogenase 3 were more abundant in leaves from partially defoliated plants relative to control plants. Short-term ¹³CO₂ labelling experiments suggested that partial defoliation did not incur an assimilation penalty although the accumulation of sugars and starch in some organs was reduced. Metabolite profiles of leaves from partially defoliated plants exhibited some differences from those of control leaves, however, no changes in the diurnal content of leaf sugar and starch were observed between treatments. The data highlights the mechanisms by which blueberry leaves adapt to increased demand and demonstrate that photosynthetic plasticity can compensate for significant loss of the photosynthetic area.
Keywords	Calvin cycle ; Vaccinium corymbosum ; aldehyde oxidoreductases ; blueberries ; carbon dioxide ; defoliation ; fruit yield ; leaves ; metabolites ; photosynthetic electron transport ; ribulose-bisphosphate carboxylase ; ribulose-bisphosphate carboxylase activase ; starch ; sugars
Language	English
Dates of publication	2020-06
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	195968-2
ISSN	0098-8472
ISSN	0098-8472
DOI	10.1016/j.envexpbot.2020.104031
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Article ; Online: Physiological, biochemical and molecular responses of the potato (Solanum tuberosum L.) plant to moderately elevated temperature.

Hancock, Robert D / Morris, Wayne L / Ducreux, Laurence J M / Morris, Jenny A / Usman, Muhammad / Verrall, Susan R / Fuller, John / Simpson, Craig G / Zhang, Runxuan / Hedley, Pete E / Taylor, Mark A

Plant, cell & environment

2014 Volume 37, Issue 2, Page(s) 439–450

Abstract: Although significant work has been undertaken regarding the response of model and crop plants to heat shock during the acclimatory phase, few studies have examined the steady-state response to the mild heat stress encountered in temperate agriculture. In ...

Abstract	Although significant work has been undertaken regarding the response of model and crop plants to heat shock during the acclimatory phase, few studies have examined the steady-state response to the mild heat stress encountered in temperate agriculture. In the present work, we therefore exposed tuberizing potato plants to mildly elevated temperatures (30/20 °C, day/night) for up to 5 weeks and compared tuber yield, physiological and biochemical responses, and leaf and tuber metabolomes and transcriptomes with plants grown under optimal conditions (22/16 °C). Growth at elevated temperature reduced tuber yield despite an increase in net foliar photosynthesis. This was associated with major shifts in leaf and tuber metabolite profiles, a significant decrease in leaf glutathione redox state and decreased starch synthesis in tubers. Furthermore, growth at elevated temperature had a profound impact on leaf and tuber transcript expression with large numbers of transcripts displaying a rhythmic oscillation at the higher growth temperature. RT-PCR revealed perturbation in the expression of circadian clock transcripts including StSP6A, previously identified as a tuberization signal. Our data indicate that potato plants grown at moderately elevated temperatures do not exhibit classic symptoms of abiotic stress but that tuber development responds via a diversity of biochemical and molecular signals.
MeSH term(s)	Alternative Splicing ; Carbon/metabolism ; Circadian Rhythm Signaling Peptides and Proteins/genetics ; Circadian Rhythm Signaling Peptides and Proteins/metabolism ; Gene Expression Regulation, Plant ; Heat-Shock Response ; Metabolome ; Oxidation-Reduction ; Photosynthesis ; Plant Proteins/genetics ; Plant Proteins/metabolism ; Solanum tuberosum/genetics ; Solanum tuberosum/metabolism ; Solanum tuberosum/physiology ; Temperature
Chemical Substances	Circadian Rhythm Signaling Peptides and Proteins ; Plant Proteins ; Carbon (7440-44-0)
Language	English
Publishing date	2014-02
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	391893-2
ISSN	1365-3040 ; 0140-7791
ISSN (online)	1365-3040
ISSN	0140-7791
DOI	10.1111/pce.12168
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Article: Phenolic compounds in blackcurrant (Ribes nigrum L.) leaves relative to leaf position and harvest date.

Vagiri, Michael / Conner, Sean / Stewart, Derek / Andersson, Staffan C / Verrall, Susan / Johansson, Eva / Rumpunen, Kimmo

Food chemistry

2015 Volume 172, Page(s) 135–142

Abstract: Blackcurrant leaves are an essential source of phenolic compounds and this study investigated their variation relative to leaf positions and harvest date. The phenolic content varied between harvest dates, although leaf position on the shoot and ... ...

Abstract	Blackcurrant leaves are an essential source of phenolic compounds and this study investigated their variation relative to leaf positions and harvest date. The phenolic content varied between harvest dates, although leaf position on the shoot and interactions also played an important role. The contents of quercetin-malonyl-glucoside, kaempferol-malonyl-glucoside isomer and kaempferol-malonyl-glucoside were higher than that of the other identified phenolic compounds, whereas epigallocatechin was the lowest for all investigated leaf positions and harvest dates. The content of several of the compounds was highest in June, while quercetin-glucoside, kaempferol-glucoside and total phenols, increased towards the end of the season. Leaf position influenced the content of myricetin-malonyl-glucoside, myricetin-malonyl-glucoside isomer, quercetin-malonyl-glucoside and kaempferol-glucoside at the end of the season. Knowledge relating to the influence of ontogenetic and harvest time on the content of specific phenolic compounds might contribute in tailoring functional foods or pharmaceutical products using blackcurrant leaves as natural ingredients.
MeSH term(s)	Chromatography, High Pressure Liquid ; Kaempferols/analysis ; Phenols/analysis ; Plant Leaves/chemistry ; Quercetin/analysis ; Ribes/chemistry
Chemical Substances	Kaempferols ; Phenols ; kaempferol (731P2LE49E) ; Quercetin (9IKM0I5T1E)
Language	English
Publishing date	2015-04-01
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	243123-3
ISSN	1873-7072 ; 0308-8146
ISSN (online)	1873-7072
ISSN	0308-8146
DOI	10.1016/j.foodchem.2014.09.041
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Article ; Online: Flavonoid profiling and transcriptome analysis reveals new gene-metabolite correlations in tubers of Solanum tuberosum L.

Stushnoff, Cecil / Ducreux, Laurence J M / Hancock, Robert D / Hedley, Pete E / Holm, David G / McDougall, Gordon J / McNicol, James W / Morris, Jenny / Morris, Wayne L / Sungurtas, Julie A / Verrall, Susan R / Zuber, Tatiana / Taylor, Mark A

Journal of experimental botany

2010 Volume 61, Issue 4, Page(s) 1225–1238

Abstract: Anthocyanin content of potato tubers is a trait that is attracting increasing attention as the potential nutritional benefits of this class of compound become apparent. However, our understanding of potato tuber anthocyanin accumulation is not complete. ... ...

Abstract	Anthocyanin content of potato tubers is a trait that is attracting increasing attention as the potential nutritional benefits of this class of compound become apparent. However, our understanding of potato tuber anthocyanin accumulation is not complete. The aim of this study was to use a potato microarray to investigate gene expression patterns associated with the accumulation of purple tuber anthocyanins. The advanced potato selections, CO97216-3P/PW and CO97227-2P/PW, developed by conventional breeding procedures, produced tubers with incomplete expression of tuber flesh pigmentation. This feature permits sampling pigmented and non-pigmented tissues from the same tubers, in essence, isolating the factors responsible for pigmentation from confounding genetic, environmental, and developmental effects. An examination of the transcriptome, coupled with metabolite data from purple pigmented sectors and from non-pigmented sectors of the same tuber, was undertaken to identify these genes whose expression correlated with elevated or altered polyphenol composition. Combined with a similar study using eight other conventional cultivars and advanced selections with different pigmentation, it was possible to produce a refined list of only 27 genes that were consistently differentially expressed in purple tuber tissues compared with white. Within this list are several new candidate genes that are likely to impact on tuber anthocyanin accumulation, including a gene encoding a novel single domain MYB transcription factor.
MeSH term(s)	Anthocyanins/biosynthesis ; Flavonoids/biosynthesis ; Gene Expression Profiling ; Gene Expression Regulation, Plant ; Molecular Sequence Data ; Plant Proteins/genetics ; Plant Proteins/metabolism ; Plant Tubers/genetics ; Plant Tubers/metabolism ; Solanum tuberosum/genetics ; Solanum tuberosum/metabolism
Chemical Substances	Anthocyanins ; Flavonoids ; Plant Proteins
Language	English
Publishing date	2010-01-28
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2976-2
ISSN	1460-2431 ; 0022-0957
ISSN (online)	1460-2431
ISSN	0022-0957
DOI	10.1093/jxb/erp394
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Article ; Online: Assessing the influence of genotype and temperature on polyphenol composition in cloudberry (Rubus chamaemorus L.) using a novel mass spectrometric method.

McDougall, G J / Martinussen, I / Junttila, O / Verrall, S / Stewart, D

Journal of agricultural and food chemistry

2011 Volume 59, Issue 20, Page(s) 10860–10868

Abstract: A high-throughput abbreviated liquid chromatography mass spectrometric (ACMS) method was used to assess the relative influence of genotype and temperature on polyphenol composition in cloudberries. Principal component analysis (PCA) plots of the collated ...

Abstract	A high-throughput abbreviated liquid chromatography mass spectrometric (ACMS) method was used to assess the relative influence of genotype and temperature on polyphenol composition in cloudberries. Principal component analysis (PCA) plots of the collated ACMS data showed a separation between crosses based on their female parents (Nyby or Fjellgull). Crosses with Nyby as the female parent had higher relative levels of masses assignable to certain ellagitannin derivatives. Crosses with Fjellgull had higher levels of distinctive masses assignable to quercetin derivatives (including a hydroxy-3-methylglutaroyl hexose derivative not previously identified in cloudberry) and anthocyanin derivatives. There was also a separation between samples grown at lower and higher temperatures, which was driven by m/z signals associated with ellagitannins and notably a major component, sanguiin H-6. Therefore, abbreviated MS techniques can discern genetic and/or environmental influences in polyphenol composition and can quickly assess quality in breeding programmes or in response to environmental changes.
MeSH term(s)	Anthocyanins/analysis ; Breeding ; Chromatography, Liquid ; Fruit/chemistry ; Fruit/growth & development ; Genotype ; Hydrolyzable Tannins/analysis ; Mass Spectrometry/methods ; Polyphenols/analysis ; Quercetin/analysis ; Rosaceae/chemistry ; Rosaceae/genetics ; Rosaceae/growth & development ; Temperature
Chemical Substances	Anthocyanins ; Hydrolyzable Tannins ; Polyphenols ; ellagitannin ; Quercetin (9IKM0I5T1E)
Language	English
Publishing date	2011-10-26
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	241619-0
ISSN	1520-5118 ; 0021-8561
ISSN (online)	1520-5118
ISSN	0021-8561
DOI	10.1021/jf202083b
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Article ; Online: Implementing voluntary assisted dying laws in healthcare: Exploring beliefs to identify implementation hurdles.

Hewitt, Jayne / Lawson, Charles / Verrall, Brodie / Grealish, Laurie

Research in nursing & health

2022 Volume 46, Issue 1, Page(s) 113–126

Abstract: The number of countries introducing voluntary assisted dying (VAD) laws is increasing. Actively taking steps to end a person's life is contentious so implementing these laws into healthcare services presents unique challenges. Theoretically underpinned ... ...

Abstract	The number of countries introducing voluntary assisted dying (VAD) laws is increasing. Actively taking steps to end a person's life is contentious so implementing these laws into healthcare services presents unique challenges. Theoretically underpinned by the Advocacy Coalition Framework, this study identified the beliefs of classes of stakeholders who engaged with the parliamentary process associated with the introduction of VAD laws in Queensland, Australia. Submissions about VAD made to a parliamentary inquiry were allocated to a class and qualitatively analysed to identify underlying beliefs. The data were then subjected to statistical analysis including nonmetric dimensional scaling and one-way analysis of similarity. Data visualisation techniques were used to generate a chord map and heatmap, to identify the belief types, as well as similarities and differences between beliefs and among classes. Fourteen different beliefs were identified in the 91 reviewed submissions. Six were deep core beliefs and eight were policy core beliefs. Beliefs could be associated with a positive or negative sentiment toward VAD. In this study, the class of Health Services expressed more negative sentiments to VAD than neutral or positive sentiments. The sentiments expressed by the class of Health Professionals were equally divided between positive, neutral and negative. These findings provide important insights for implementors as laws become operational. In particular, for organisations that provide health services, clear articulation of their stance in relevant policy and guidance documents is recommended.
MeSH term(s)	Humans ; Suicide, Assisted ; Australia ; Delivery of Health Care
Language	English
Publishing date	2022-12-20
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	424453-9
ISSN	1098-240X ; 0160-6891
ISSN (online)	1098-240X
ISSN	0160-6891
DOI	10.1002/nur.22287
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Article ; Online: Cognitive Functioning and Psychosocial Outcomes in Adults with Complex Congenital Heart Disease: A Cross-sectional Pilot Study.

Verrall, Charlotte E / Tran, Derek L / Kasparian, Nadine A / Williams, Tracey / Oxenham, Vincent / Ayer, Julian / Celermajer, David S / Cordina, Rachael L

Pediatric cardiology

2024 Volume 45, Issue 3, Page(s) 529–543

Abstract: Adults with complex congenital heart disease (CHD) are at risk for cognitive dysfunction. However, associations between cognitive dysfunction and psychosocial outcomes are poorly defined. Between June and November 2022, we prospectively recruited 39 ... ...

Abstract	Adults with complex congenital heart disease (CHD) are at risk for cognitive dysfunction. However, associations between cognitive dysfunction and psychosocial outcomes are poorly defined. Between June and November 2022, we prospectively recruited 39 adults with complex CHD who completed a computerized cognitive assessment (Cogstate) and validated psychosocial scales measuring psychological distress, health-related quality of life (HRQOL), and resilience. Participants had a mean age of 36.4 ± 11.2 years. Over half (62%) were women, most (79%) had complex biventricular CHD, and 21% had Fontan physiology. Prevalence of cognitive dysfunction was greatest in the domains of attention (29%), working memory (25%), and psychomotor speed (21%). Adjusting for age and sex, Pearson partial correlations between Cogstate z-scores and self-reported cognitive problems were small. Participants who lived in the most disadvantaged areas and those with a below-average annual household income had lower global cognitive z-scores (p = 0.02 and p = 0.03, respectively). Two-thirds (64%) reported elevated symptoms of depression, anxiety, and/or stress. Small correlations were observed between psychological distress and cognitive performance. Greater resilience was associated with lower psychological distress (r ≥ -0.5, p < 0.001) and higher HRQOL (r = 0.33, p = 0.02). Our findings demonstrate that adults with complex CHD have a high risk of cognitive dysfunction, though may not recognize or report their cognitive challenges. Lower socioeconomic status may be an indicator for those at risk of poorer cognitive functioning. Psychological distress is common though may not be a strong correlate of performance-based cognitive functioning. Formal cognitive evaluation in this patient population is essential. Optimizing resilience may be a protective strategy to minimize psychological distress and bolster HRQOL.
MeSH term(s)	Adult ; Humans ; Female ; Middle Aged ; Male ; Pilot Projects ; Quality of Life ; Cross-Sectional Studies ; Cognition/physiology ; Heart Defects, Congenital/surgery
Language	English
Publishing date	2024-01-23
Publishing country	United States
Document type	Journal Article
ZDB-ID	800857-7
ISSN	1432-1971 ; 0172-0643
ISSN (online)	1432-1971
ISSN	0172-0643
DOI	10.1007/s00246-023-03376-7
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Article: Flavonoid profiling and transcriptome analysis reveals new gene-metabolite correlations in tubers of Solanum tuberosum L

Stushnoff, Cecil / Ducreux, Laurence J.M / Hancock, Robert D / Hedley, Pete E / Holm, David G / McDougall, Gordon J / McNicol, James W / Morris, Jenny / Morris, Wayne L / Sungurtas, Julie A / Verrall, Susan R / Zuber, Tatiana / Taylor, Mark A

Journal of experimental botany. 2010 Feb., v. 61, no. 4

2010

Abstract	Anthocyanin content of potato tubers is a trait that is attracting increasing attention as the potential nutritional benefits of this class of compound become apparent. However, our understanding of potato tuber anthocyanin accumulation is not complete. The aim of this study was to use a potato microarray to investigate gene expression patterns associated with the accumulation of purple tuber anthocyanins. The advanced potato selections, CO97216-3P/PW and CO97227-2P/PW, developed by conventional breeding procedures, produced tubers with incomplete expression of tuber flesh pigmentation. This feature permits sampling pigmented and non-pigmented tissues from the same tubers, in essence, isolating the factors responsible for pigmentation from confounding genetic, environmental, and developmental effects. An examination of the transcriptome, coupled with metabolite data from purple pigmented sectors and from non-pigmented sectors of the same tuber, was undertaken to identify these genes whose expression correlated with elevated or altered polyphenol composition. Combined with a similar study using eight other conventional cultivars and advanced selections with different pigmentation, it was possible to produce a refined list of only 27 genes that were consistently differentially expressed in purple tuber tissues compared with white. Within this list are several new candidate genes that are likely to impact on tuber anthocyanin accumulation, including a gene encoding a novel single domain MYB transcription factor.
Keywords	Solanum tuberosum ; anthocyanins ; cultivars ; gene expression ; gene expression regulation ; genes ; microarray technology ; nutrition ; pigmentation ; potatoes ; transcription factors ; transcriptome ; tubers
Language	English
Dates of publication	2010-02
Size	p. 1225-1238.
Document type	Article
ZDB-ID	2976-2
ISSN	1460-2431 ; 0022-0957
ISSN (online)	1460-2431
ISSN	0022-0957
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