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| 1 | Differential regulation of the anthocyanin profile in purple kiwifruit(Actinidia species)显示文摘Anthocyanins are a group of secondary metabolites that colour fruit and flowers orange,red,purple or blue depending on a number of factors,such as the basic structure,co-pigmentation,metal ion complexation and vacuolar pH.The biosynthesis of anthocyanin is regulated at the transcriptional level by a group of transcription factors,the MYB–bHLH–WD40(MBW)complex.In this study,the purple colouration in several kiwifruit(Actinidia)species was identified and characterised as red cyanidin-based and blue delphinidin-based anthocyanins.The differential pigmentation in the skin and flesh can be attributed to the differential ratio of cyanidin and delphinidin derivatives accumulated in the total anthocyanin profile.The expression of anthocyanin biosynthetic genes chalcone synthase(CHS),flavonoid 3-O-glucosyltransferase(F3GT),flavonoid 3′-hydroxylase(F3′H)and flavonoid 3′5′-hydroxylase(F3′5′H)is crucial for anthocyanin accumulation.However,the balance of expression of the F3′H and F3′5′H genes appears responsible for the ratio of cyanidin and delphinidin derivatives,while a lack of CHS,F3GT and MYB110 expression is responsible for a lack of total anthocyanins.The transcriptional regulation of the F3′H and F3′5′H promoters by the R2R3 MYB transcription factor MYB110 is markedly different in tobacco transient assays.When kiwifruit MYB10 or MYB110 are over-expressed in Actinidia chinensis both cyanidin-based and delphinidin-based anthocyanins are elevated,but F3′H and F3′5′H genes are not strongly correlated with MYB expression.These results suggest that the core kiwifruit anthocyanin pathway genes are dependent on characterised MYB transcription factors,while other regulatory proteins are more directly responsible for the expression of the F3′H and F3′5′H genes. | Yongyan Peng Kui Lin-Wang Janine M.Cooney Tianchi Wang Richard V.Espley Andrew C.Allan | 2019 | Horticulture Research2019，6，1： | 6 |
| 2 | Unraveling a genetic roadmap for improved taste in the domesticated apple显示文摘Although taste is an important aspect of fruit quality, an understanding of its genetic control remains elusive in apple and other fruit crops. In this study, we conducted genomic sequence analysis of 497 Malus accessions and revealed erosion of genetic diversity caused by apple breeding and possible independent domestication events of dessert and cider apples. Signatures of selection for fruit acidity and size, but not for fruit sugar content, were detected during the processes of both domestication and improvement. Furthermore, we found that single mutations in major genes affecting fruit taste, including Ma1, MdTDT, and MdSOT2, dramatically decrease malate, citrate, and sorbitol accumulation, respectively, and correspond to important domestication events. Interestingly, Ma1 was identified to have pleiotropic effects on both organic acid content and sugar:acid ratio, suggesting that it plays a vital role in determining fruit taste. Fruit taste is unlikely to have been negatively affected by linkage drag associated with selection for larger fruit that resulted from the pyramiding of multiple genes with minor effects on fruit size. Collectively, our study provides new insights into the genetic basis of fruit quality and its evolutionary roadmap during apple domestication, pinpointing several candidate genes for genetic manipulation of fruit taste in apple. | Liao Liao Weihan Zhang Bo Zhang Ting Fang Xiao-Fei Wang Yarning Cai Collins Ogutu Lei Gao Gang Chen Xiaoqing Nie Jinsheng Xu Quanyan Zhang Yiran Ren Jianqiang Yu Chukun Wang Cecilia H.Deng Baiquan Ma Beibei Zheng Chun-Xiang You Da-Gang Hu Richard Espley Kui Lin-Wang Jia-Long Yao Andrew C.Allan Awais Khan Schuyler S.Korban Zhangjun Fei Ray Ming Yu-Jin Hao Li Li Yuepeng Han | 2021 | Molecular Plant2021，14，9： | 5 |
| 3 | The involvement of PybZIPa in light-induced anthocyanin accumulation via the activation of PyUFGT through binding to tandem G-boxes in its promoter显示文摘To gain insight into how anthocyanin biosynthesis is controlled by light in fruit,transcriptome and metabolome analyses were performed in the Chinese sand pear cultivar“Mantianhong”(Pyrus pyrifolia)after bagging and bag removal.We investigated transcriptional and metabolic changes and gene-metabolite correlation networks.Correlation tests of anthocyanin content and transcriptional changes revealed that 1,530 transcripts were strongly correlated with 15 anthocyanin derivatives(R2>0.9,P-value<0.05),with the top 130 transcripts categorized as being associated with flavonoid metabolism,transcriptional regulation,and light signaling.The connection network revealed a new photosensitive transcription factor,PybZIPa,that might play an important role during light-induced anthocyanin accumulation.The overexpression of PybZIPa promoted anthocyanin accumulation in pear and strawberry fruit as well as tobacco leaves.Dual luciferase and Y1H assays further verified that PybZIPa directly activated the expression of PyUFGT by binding to tandem G-box motifs in the promoter,which was key to differential anthocyanin accumulation in debagged pear skin,and the number of G-box motifs affected the transcriptional activation of PyUFGT by PybZIPa.The results indicate that the light-induced anthocyanin biosynthesis regulatory mechanism in pear differs from that described in previous reports suggesting that a bZIP family member co-regulates anthocyanin biosynthesis with other transcription factors in apple and Arabidopsis.It was found that,in response to light,PybZIPa promoted anthocyanin biosynthesis by regulating important transcription factors(PyMYB114,PyMYB10,and PyBBX22)as well as structural genes(PyUFGT)via binding to G-boxes within promoters.This activation was amplified by the self-binding of PybZIPa to activate its own promoter.Overall,we demonstrate the utility of a multiomics integrative approach for discovering new functional genes and pathways underlying light-induced anthocyanin biosynthesis. | Hainan Liu Jun Su Yangfan Zhu Gaifang Yao Andrew C.Allan Charles Ampomah-Dwamena Qun Shu Kui Lin-Wang Shaoling Zhang Jun Wu | 2019 | Horticulture Research2019，6，1： | 3 |
| 4 | Red colouration in apple fruit is due to the activity of the MYB transcription factor, MdMYB10显示文摘 | Richard V.Espley Roger P.Hellens JoPutterill David E.Stevenson SumathiKutty‐Amma Andrew C.Allan | 2007 | The Plant Journal2007，，3： | 2 |
| 5 | Identification and characterisation of F3GT1 and F3GGT1, two glycosyltransferases responsible for anthocyanin biosynthesis in red‐fleshed kiwifruit (Actinidia chinensis)显示文摘 | MircoMontefiori Richard V.Espley DavidStevenson JanineCooney Paul M.Datson AnnaSaiz Ross G.Atkinson Roger P.Hellens Andrew C.Allan | 2010 | The Plant Journal2010，，1： | 1 |
| 6 | Genomic analysis uncovers functional variation in the C-terminus of anthocyanin-activating MYB transcription factors显示文摘MYB transcription factors regulate diverse aspects of plant development and secondary metabolism,often by partnering in transcriptional regulatory complexes.Here,we harness genomic resources to identify novel MYBs,thereby producing an updated eudicot MYB phylogeny with revised relationships among subgroups as well as new information on sequence variation in the disordered C-terminus of anthocyanin-activating MYBs.BLAST®and hidden Markov model scans of gene annotations identified a total of 714 MYB transcription factors across the genomes of four crops that span the eudicots:apple,grape,kiwifruit and tomato.Codon model-based phylogenetic inference identified novel members of previously defined subgroups,and the function of specific anthocyanin-activating subgroup 6 members was assayed transiently in tobacco leaves.Sequence conservation within subgroup 6 highlighted one previously described and two novel short linear motifs in the disordered C-terminal region.The novel motifs have a mix of hydrophobic and acidic residues and are predicted to be relatively ordered compared with flanking protein sequences.Comparison of motifs with the Eukaryotic Linear Motif database suggests roles in protein–protein interaction.Engineering of motifs and their flanking regions from strong anthocyanin activators into weak activators,and vice versa,affected function.We conclude that,although the MYB C-terminal sequence diverges greatly even within MYB clades,variation within the C-terminus at and near relatively ordered regions offers opportunities for exploring MYB function and developing superior alleles for plant breeding. | Jessica A.Rodrigues Richard V.Espley Andrew C.Allan | 2021 | Horticulture Research2021，8，1： | 1 |
| 7 | Environmental regulation of leaf colour in red 35S:PAP1 Arabidopsis thaliana显示文摘 | Daryl D.Rowan MingshuCao KuiLin‐Wang Janine M.Cooney Dwayne J.Jensen Paul T.Austin Martin B.Hunt CaraNorling Roger P.Hellens Robert J.Schaffer Andrew C.Allan | 2009 | New Phytologist2009，，1： | 1 |
| 8 | Red colouration in apple fruit is due to the activity of the MYB transcription factor, MdMYB10显示文摘 | Richard V.Espley Roger P.Hellens JoPutterill David E.Stevenson SumathiKutty‐Amma Andrew C.Allan | 2007 | The Plant Journal2007，，3： | 1 |
| 9 | Postharvest temperature influences volatile lactone production via regulation of acyl‐CoA oxidases in peach fruit显示文摘 | WAN‐PENGXI BOZHANG LILIANG JI‐YUANSHEN WEN‐WENWEI CHANG‐JIEXU ANDREW C.ALLAN IAN B.FERGUSON KUN‐SONGCHEN | 2012 | Plant Cell & Environment2012，，3： | 1 |
| 10 | Strategies for fast breeding and improvement of Actinidia species显示文摘Perspective Ensuring food security for a rapidly growing world population will need new approaches.These include speed breeding and new breeding technologies,which have been established for major staple crops.Improvement of woody perennial fruit tree species has progressed at a much slower pace and has met many obstacles.Yet fruit production will face major challenges with climate change,such as the loss of winter chilling needed for f lowering,a potential decrease in pollinator availability,and increasing pest and disease problems.Actinidia chinensis(kiwifruit)is an important fresh fruit crop,with varieties only several generations removed from the wild accessions and carrying only a fraction of the available genetic diversity[1,2].Improvement of traits such as fruit quality and storage,and resistance to emergent diseases underpin the breeding efforts,which are hampered by a long generation time,large plant size,dependence on chilling for budbreak and f lowering,dioecy and different ploidy levels.In addition to kiwifruit,the genus Actinidia consists of more than 50 species with edible fruit,all showing tremendous potential as future fruit crops[3].Their fast domestication and improvement will enable production of high-quality healthy fruit,contributing to food security in the changing climate conditions. | Dinum Herath Tianchi Wang Charlotte Voogd Yongyan Peng Mikaela Douglas Joanna Putterill Erika Varkonyi-Gasic Andrew C.Allan | 2023 | Horticulture Research2023，10，3： | 0 |
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