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Overexpression of blueberry FLOWERING LOCUS T is associated with changes in the expression of phytohormone-related genes in blueberry plants

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Horticulture Research 2016年第1期3卷 59-67页

作者： Xuan Gao aaron E walworth Charity Mackie Guo-qing Song Department of Horticulture Plant Biotechnology Resource and Outreach CenterMichigan State UniversityEast LansingMI 48824USA Key Laboratory for the Conservation and Utilization of Important Biological Resources College of Life SciencesAnhui Normal UniversityWuhu 241000China

Flowering locus T(FT)is a primary integrator in the regulation of plant *** a blueberry(Vaccinium corymbosum L.)FT gene(VcFT)(herein VcFT-OX)resulted in early flowering and dwarfing in‘Aurora’plants(herein‘VcFT-Aurora’).In this study,we found that VcFT-OX reduced shoot regeneration from leaf *** investigate the potential roles of the phytohormone pathway genes associated with VcFT-OX,differentially expressed(DE)genes in leaf tissues of‘VcFT-Aurora’plants were annotated and analyzed using non-transgenic‘Aurora’plants as a *** DE floral genes,including the blueberry SUPPRESSOR of Overexpression of constans 1(VcSOC1)(gibberellin related),Abscisic acid responsive elements-binding factor 2(VcABF2)and protein related to ABI3/VP1(VcABI3/VP1)(ethylene-related),are present under both the phytohormone-responsive and the dwarfing-related Gene Ontology *** gene networks of the DE genes overall showed the molecular basis of the multifunctional aspects of VcFT overexpression beyond flowering promotion and suggested that phytohormone changes could be signaling molecules with important roles in the phenotypic changes driven by VcFT-OX.

关键词： Aurora dwarf blue

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VcFT-induced mobile florigenic signals in transgenic and transgrafted blueberries

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Horticulture Research 2019年第1期6卷 407-421页

作者： Guo-qing Song aaron walworth Tianyi Lin Qiuxia Chen Xiumei Han LIrina Zaharia Gan-yuan Zhong Plant Biotechnology Resource and Outreach Center Department of HorticultureMichigan State UniversityEast LansingMI 48824USA Aquatic and Crop Resource Development National Research Council of CanadaSaskatoon SK S7N 0W9Canada Grape Genetics Research Unit USDA-ARSGenevaNY 14456USA

FLOWERING LOCUS T(FT)can promote early flowering in annual species,but such role has not been well demonstrated in woody *** produced self and reciprocal grafts involving non-transgenic blueberry(NT)and transgenic blueberry(T)carrying a 35S-driven blueberry FT(VcFT-OX).We demonstrated that the transgenic VcFT-OX rootstock promoted flowering of non-transgenic blueberry scions in the NT(scion):T(rootstock)*** further analyzed RNASeq profiles and six groups of phytohormones in both NT:T and NT:NT *** observed content changes of several hormone metabolites,in a descending order,in the transgenic NT:T,non-transgenic NT:T,and non-transgenic NT:NT *** comparing differential expression transcripts(DETs)of these tissues in relative to their control,we found that the non-transgenic NT:T leaves had many DETs shared with the transgenic NT:T leaves,but very few with the transgenic NT:T ***,a number of these shared DETs belong to hormone pathway genes,concurring with the content changes of hormone metabolites in both transgenic and non-transgenic leaves of the NT:T *** results suggest that phytohormones induced by VcFT-OX in the transgenic leaves might serve as part of the signals that resulted in early flowering in both transgenic plants and the non-transgenic NT:T scions.

关键词： blue grafted roots

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VcRR2 regulates chilling-mediated flowering through expression of hormone genes in a transgenic blueberry mutant

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Horticulture Research 2019年第1期6卷 531-546页

作者： Tianyi Lin aaron walworth Xiaojuan Zong Gharbia H.Danial Elise M.Tomaszewski Pete Callow Xiumei Han L.Irina Zaharia Patrick P.Edger Gan-yuan Zhong Guo-qing Song Plant Biotechnology Resource and Outreach Center Department of HorticultureMichigan State UniversityEast LansingMI 48824USA Department of Horticulture Michigan State UniversityEast LansingMI 48824USA Aquatic and Crop Resource Development National Research Council of CanadaSaskatoonSK S7N 0W9Canada Grape Genetics Research Unit USDA-ARSGenevaNY 14456USA

The molecular mechanism underlying dormancy release and the induction of flowering remains poorly understood in woody ***-legacy is a valuable blueberry mutant,in which a transgene insertion caused increased expression of a RESPONSE REGULATOR 2-like gene(VcRR2).Mu-legacy plants,compared with nontransgenic‘Legacy’plants,show dwarfing,promotion of flower bud formation,and can flower under nonchilling *** conducted transcriptomic comparisons in leaves,chilled and nonchilled flowering buds,and late-pink buds,and analyzed a total of 41 metabolites of six groups of hormones in leaf tissues of both Mu-legacy and‘Legacy’*** analyses uncovered that increased VcRR2 expression promotes the expression of a homolog of Arabidopsis thaliana ENTCOPALYL DIPHOSPHATE SYNTHETASE 1(VcGA1),which induces new homeostasis of hormones,including increased gibberellin 4(GA4)levels in Mu-legacy ***,increased expression of VcRR2 and VcGA1,which function in cytokinin responses and gibberellin synthesis,respectively,initiated the reduction in plant height and the enhancement of flower bud formation of the Mu-legacy plants through interactions of multiple *** nonchilled flower buds,29 differentially expressed transcripts of 17 genes of five groups of hormones were identified in transcriptome comparisons between Mu-legacy and‘Legacy’plants,of which 22 were chilling ***,these analyses suggest that increased expression of VcRR2 was collectively responsible for promoting flower bud formation in highbush blueberry under nonchilling *** report here for the first time the importance of VcRR2 to induce a suite of downstream hormones that promote flowering in woody plants.

关键词： collective insertion dwarf

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柱型苹果MdLAS基因的克隆与转化苹果和烟草的研究

柱型苹果MdLAS基因的克隆与转化苹果和烟草的研究

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中国园艺学会2012年学术年会

作者：张玉刚韩菲 Song Guo-qing walworth aaron 戴洪义青岛农业大学园林园艺学院 Department of Horticulture Michigan State University

柱型苹果(Columnar apple),又称芭蕾苹果(Ballerina apple),最早来自于‘旭’(McIntosh)的一个突变体‘旭威赛克’(McIntosh Wijcik),具有"树冠极紧凑,近似圆柱体,节间极短,短枝率高,萌芽率强"等显著特性,是株形改良的珍贵资源。本试验... 详细信息

柱型苹果(Columnar apple),又称芭蕾苹果(Ballerina apple),最早来自于‘旭’(McIntosh)的一个突变体‘旭威赛克’(McIntosh Wijcik),具有"树冠极紧凑,近似圆柱体,节间极短,短枝率高,萌芽率强"等显著特性,是株形改良的珍贵资源。本试验中利用柱型苹果杂交后代柱型株系为试材,克隆了柱型苹果分枝基因MdLAS,并转化了‘嘎啦’苹果和烟草,旨在为研究柱型苹果株形形成的分子机理及基因工程育种奠定理论基础。

关键词：苹果柱型苹果 LAS基因基因克隆遗传转化

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