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Effect of Paclobutrazol Application on Plant Growth and flower Quality in Herbaceous Peony

Phyton-International Journal of Experimental Botany 2022年第9期91卷 2017-2032页

作者： Yanqing Wu Jiao Liu Daqiu Zhao Jun Tao Joint International Research Laboratory of Agriculture and Agri-Product Safety The Ministry of Education of ChinaInstitutes of Agricultural Science and Technology DevelopmentYangzhou UniversityYangzhou225009China Jiangsu Key Laboratory of Crop Genetics and Physiology College of Horticulture and Plant ProtectionYangzhou UniversityYangzhou225009China

Herbaceous peony(Paeonia lactiflora Pall.)is an important ornamental plant *** its natural state,*** often manifests traits like rapidly elongating internodal growth,loose plant types,and soft inflorescence ***,very little has been known about the measures for controlling these *** study investigated the effect of applying paclobutrazol(PBZ)on the plant growth and flower quality in *** results indicated that PBZ application reduced the plant height(8.05%),plant crown width(14.72%),and leaf area(10.90%),but increased the leaf thickness(18.18%)and stem diameter(over 11%)in ***,PBZ application was also found to increase the chlorophyll(Chl)a(29.63%),Chl b(33.33%),Chl a+b(30.56%),SPAD(27.32%),relative water content(0.47%),soluble sugar(5.09%)and activities of three antioxidant enzymes(superoxide dismutase 169.66%,peroxidase 3.59%,catalase 319.30%),but decreased the relative electrical conductivity(18.52%).Additionally,the application of PBZ was found to affect the flowering quality of ***,increasing the flower diameter and fresh weight only in the flower-bud *** initiates the bloom stage,where there was a decrease in the total content of the aromatic compounds except for the flower-bud stage,and faded the flower color by reducing the content of *** results demonstrated that the application of PBZ can regulate the *** plant types with no significant decrease in its ornamental *** might provide a theoretical basis for further applying PBZ in *** for use in urban landscape spaces.

关键词： Paeonia lactiflora growth bioregulator flower color aromatic compound

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The Melastoma dodecandrum genome and the evolution of Myrtales

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Journal of Genetics and Genomics 2022年第2期49卷 120-131页

作者： Yang Hao Yu-Zhen Zhou Bin Chen Gui-Zhen Chen Zhen-Ying Wen Diyang Zhang Wei-Hong Sun Ding-Kun Liu Jie Huang Jin-Liao Chen Xiao-Qin Zhou Wan-Lin Fan Wen-Chun Zhang Lin Luo Wen-Chao Han Yan Zheng Long Li Peng-Cheng Lu Yue Xing Shu-Ya Liu Jia-Ting Sun Ying-Hui Cao Yan-Ping Zhang Xiao-Ling Shi Sha-Sha Wu Ye Ai Jun-Wen Zhai Si-Ren Lan Zhong-Jian Liu Dong-Hui Peng Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350002China Innovation and Application Engineering Technology Research Center of Ornamental Plant Germplasm Resources in Fujian Province Fuzhou 350002China

Melastomataceae has abundant morphological diversity with high economic and ornamental merit in Myrtales. The phylogenetic position of Myrtales is still contested. Here, we report the chromosome-level genome assembly of Melastoma dodecandrum in Melastomataceae. The assembled genome size is299.81 Mb with a contig N50 value of 3.00 Mb. Genome evolution analysis indicated that M. dodecandrum,Eucalyptus grandis, and Punica granatum were clustered into a clade of Myrtales and formed a sister group with the ancestor of fabids and malvids. We found that M. dodecandrum experienced four whole-genome polyploidization events: the ancient event was shared with most eudicots, one event was shared with Myrtales, and the other two events were unique to M. dodecandrum. Moreover, we identified MADS-box genes and found that the AP1-like genes expanded, and AP3-like genes might have undergone subfunctionalization. The SUAR63-like genes and AG-like genes showed different expression patterns in stamens, which may be associated with heteranthery. In addition, we found that LAZY1-like genes were involved in the negative regulation of stem branching development, which may be related to its creeping features. Our study sheds new light on the evolution of Melastomataceae and Myrtales, which provides a comprehensive genetic resource for future research.

关键词： Melastoma Genome evolution flower development Heteranthery flower color Creeping stem

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Determination of Anthocyanins and Exploration of Relationship between Their Composition and Petal coloration in Crape Myrtle (Lagerstroemia hybrid)

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Journal of Integrative Plant Biology 2008年第5期50卷 581-588页

作者： Jie Zhang Liang-Sheng Wang Jin-Ming Gao Qing-Yan Shu Chong-Hui Li Juan Yao Qing Hao Jing-Jing Zhang College of Science Northwest A&F University Shaanxi 712100 China Beijing Botanical Garden Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

Petal coloration and pigment components in 12 American crape myrtle cultivars （Lagerstroemia indica x Lagerstroemia fauriei） and five Chinese crape myrtle cuItivars （L. indica hybrids） were studied. color was measured by CIEL^＊a^＊b^＊ scale and anthocyanin composition of crape myrtle was determined using high-performance liquid chromatography coupled to photodiode array detection and electrospray ionization mass spectrometry. The presence of the previously reported delphinidin 3-O-glucoside, petunidin 3-O-glucoside and malvidin 3-O-glucoside were confirmed. Cyanidin 3-O-glucoside was identified in crape myrtle for the first time. We explored the relationship between petal color and anthocyanin contents by multiple linear regression analyses. The results indicated that total fiavones and fiavonols were important variables and contributed to blue-enhancing in crape myrtle. Based on anthocyanins and co-pigments analysis, flower color breeding in crape myrtle towards true-red and blue were discussed.

关键词： anthocyanin breeding co-pigmentation crape myrtle flower color high-performance liquid chromatography and electrospray ionization mass spectrometry.

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Regulatory mechanisms of rapeseed petal color formation:Current research status and future perspectives

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Oil Crop Science 2022年第4期7卷 174-179页

作者： Shijun Li Tao Chang Xi Li Zechuan Peng Chunyun Guan Mei Guan National Oil Crops Improvement Center in Hunan Department of AgronomyHunan Agricultural UniversityChangsha410128China

flower color,an important rapeseed character,has great practical value and research *** has become an area of intensive research in recent *** paper summarizes the latest research progress on rape flower color in terms of variety,source,pigment composition,formation mechanism,and ***,it provides an overview of rape flower color breeding and omics.

关键词： Rape flower color Carotenoids Flavonoids Omics

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The Gerbera hybrida R2R3-MYB transcription factor GhMYB1a regulates gibberellin-mediated anthocyanin accumulation

The Gerbera hybrida R2R3-MYB transcription factor GhMYB1a re...

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全国农业生物化学与分子生物学第十五届学术研讨会

作者： Yi Tanga Yuping Yanga Xiaoyi Zheng Chunmei Zhong Lingfei Li Yiyun Li Shan Liang Xiaojing Wang Guangdong Provincial Key Laboratory of Biotechnology for Plant Development School of Life SciencesSouth China Normal University

Gerbera hybrida is a popular ornamental plant,but also an ideal model species due to the rich coloration of its flowers and its complex organ growth and *** accumulation is important for color generation in petals,but relatively few of the genes involved have been characterized in ***,we report an R2R3-MYB protein,GhMYB1a,which is highly related to a previously reported transcription factor,*** of GhMYB1a in G.

关键词： Gerbera hybrida R2R3-MYB protein anthocyanin flower color gibberellin

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