Article
Agronomy
Qian Li, Chenxia Cheng, Chunjian Zhang, Junxiu Xue, Yong Zhang, Caihong Wang, Ruihong Dang, Shaolan Yang
Summary: Superficial scald is a physiological disorder in pear fruit that occurs during cold storage and affects fruit quality and value. This study found that treating pear fruit with calcium chloride (CaCl2) reduced lignin accumulation and downregulated the expression of the Pb4CL2 gene, resulting in the inhibition of superficial scald.
Article
Plant Sciences
Xiaofeng Liu, Shuran Li, Xinxin Feng, Liulin Li
Summary: Hardened fruits have lower soluble pectin content, higher lignin content, and rapidly increasing stone cell density, leading to increased firmness and decreased quality.
JOURNAL OF PLANT GROWTH REGULATION
(2021)
Article
Horticulture
Anna Ma, Dan Wang, Hanle Lu, Huicong Wang, Yonghua Qin, Guibing Hu, Jietang Zhao
Summary: Bagging treatment can enhance anthocyanin accumulation in litchi pericarp, with LcUVR8-5 and LcHY5-1 upregulated and LcCOP1-2 down-regulated upon bag removal. Functional experiments demonstrated that LcCOP1-2 negatively regulates anthocyanin accumulation in a light-dependent manner, while LcHY5-1 activates the expression of anthocyanin biosynthesis genes. This suggests a conserved UVR8-COP1-HY5 signal pathway regulating anthocyanin biosynthesis in litchi under light.
SCIENTIA HORTICULTURAE
(2021)
Article
Plant Sciences
Kaijie Qi, Xiaofei Song, Yazhou Yuan, Jianping Bao, Xin Gong, Xiaosan Huang, Shahrokh Khanizadeh, Shaoling Zhang, Shutian Tao
Summary: This study identified and analyzed CAD genes in Rosaceae plants, finding that they were clustered into six subgroups with events like dispersed and whole-genome/segmental duplications during evolution. The highest number of collinear gene pairs was found in pear, with five pairs, and these PbrCAD gene pairs underwent purifying selection.
Article
Plant Sciences
Xinya Wang, Muhammad Aamir Manzoor, Mengna Wang, Yu Zhao, Xiaofeng Feng, Pravej Alam, Xujing Chi, Yongping Cai
Summary: GRAS transcription factors (TFs) in Chinese white pear were systematically characterized in this study. Phylogenetic and structural analysis revealed the features of the PbGRAS family. Synteny analysis showed the conservation of duplicated regions, with dispersed duplication events playing a crucial role in the expansion of the GRAS gene family. Cis-acting elements associated with hormone and environmental stress responses were found in the promoter regions of PbGRAS genes. PbGRAS89 and PbGRAS99 played important roles in leaf development.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Horticulture
Jingang He, Yunxiao Feng, Yudou Cheng, Junfeng Guan
Summary: The preharvest application of aminoethoxyvinylglycine (AVG) at a concentration of 200 mg/L reduced core browning in 'Huangguan' pear. It improved fruit firmness, soluble solids content, and titratable acid content, while inhibiting the expression of genes related to ethylene biosynthesis and signaling pathways, chlorogenic acid biosynthesis, and polyphenol oxidase activity.
Article
Biochemistry & Molecular Biology
Xieyu Li, Fangxin Xiang, Wei Han, Bingqing Qie, Rui Zhai, Chengquan Yang, Zhigang Wang, Lingfei Xu
Summary: This study identified the function of PbbHLH2 containing the MIR-domain in regulating anthocyanin biosynthesis in Zaosu pear peel. The MIR-domain was shown to interact with R2R3-MYB TFs and activate the expression of late biosynthetic genes, ultimately increasing the anthocyanin content. These findings suggest a key role of the MIR domain in the interaction between MIR-domain bHLH and R2R3-MYB TFs.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Plant Sciences
Baopeng Ding, Tingting Liu, Chaohui Hu, Yuqin Song, Ruijie Hao, Xinxin Feng, Tingting Cui, Youzhi Han, Liulin Li
Summary: The study revealed that paclobutrazol (PBZ) may have a negative impact on the bulged surface of pear fruit by inhibiting auxin-related genes, thus affecting cell division, cell elongation, and vascular bundle development in the fruit. Analyzing the internal anatomical structure, physiological characteristics, and gene expression of the fruit can uncover the mechanism behind the formation of bulged surface.
PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
(2021)
Article
Multidisciplinary Sciences
Jiahui Xu, Xingyu Tao, Zhihua Xie, Xin Gong, Kaijie Qi, Shaoling Zhang, Katsuhiro Shiratake, Shutian Tao
Summary: The study identified the CSE gene family from Pyrus bretschneideri, showing that PbCSE1 is associated with lignin deposition and stone cell formation in pear fruits. Overexpression of PbCSE1 led to increased lignin content in pear fruits and delayed growth in Arabidopsis, suggesting a potential molecular strategy to improve pear fruit quality.
SCIENTIFIC REPORTS
(2021)
Article
Plant Sciences
Muhammad Aamir Manzoor, Muhammad Mudassar Manzoor, Guohui Li, Muhammad Abdullah, Wang Han, Han Wenlong, Awais Shakoor, Muhammad Waheed Riaz, Shamsur Rehman, Yongping Cai
Summary: In this study, 62 bZIP genes were comprehensively identified in Chinese white pear, with gene structure, motif composition, subcellular localization, synteny analysis, and synonymous (Ks) and non-synonymous (Ka) calculations performed. Results showed that PbbZIP genes originated through whole-genome duplication and dispersed duplication events. These findings provide a foundation for further understanding the biological function characterizations under multiple developmental stages and abiotic stress responses.
Article
Horticulture
Peng Zhou, Linlin Huang, Yingtao Wang, Xiao Li, Xinxin Feng, Liulin Li
Summary: Real-time quantitative PCR (RT-qPCR) is commonly used to explore plant gene expression levels. However, under various stresses and hormone treatments, the levels of most reference genes vary, leading to potential misinterpretation of gene function in pears. This study aimed to identify the optimal reference genes in Huangguan pears and analyze the expression of several candidate genes in different stress and hormone treatments. The results showed that the WDP gene exhibited the most stable expression, ACT was the most stable under MeJA treatment, YLS8 was the most valuable reference gene under ABA hormone and heat stress, and GAPDH showed poor performance compared to other housekeeping genes. These findings provide valuable information for future studies on housekeeping gene selection in pears under biotic and abiotic stresses.
Article
Multidisciplinary Sciences
Yang Zhang, Decong Li, Xiaofeng Feng, Xinya Wang, Mengna Wang, Wenlong Han, Muhammad Aamir Manzoor, Guohui Li, Tianzhe Chen, Han Wang, Yongping Cai
Summary: This study identified the basic information of CGS, SAHH, and SAMS genes in five Rosaceae species and further revealed the expression patterns in the pear fruit, providing a theoretical basis for the regulation of pear stone cells.
Article
Agronomy
Sun-Heum Cho, Sewon Oh, Hyeondae Han, Keumsun Kim, Haewon Jung, Daeil Kim
Summary: This study conducted genetic analysis on fruit shape in pear using QTL analysis and HRM markers, providing valuable information for pear breeding.
Article
Plant Sciences
Lijun Gan, Mengying Song, Xuechun Wang, Na Yang, Hu Li, Xuexia Liu, Yi Li
Summary: This study provides genetic evidence that endogenous cytokinins (CKs) play a role in pericarp growth and fruit size regulation in tomatoes. Overexpression of the CK-inactivating enzyme gene AtCKX2 led to reduced pericarp thickness and smaller fruit size, primarily due to decreased cell division. Transcriptome profiling also revealed changes in gene expression involved in cell division, expansion, and hormone signaling pathways. These findings highlight the importance of CKs in regulating pericarp development and fruit size in tomatoes.
HORTICULTURE RESEARCH
(2022)
Article
Horticulture
Xiao-Yue Wang, Hui-Ling Wang, Guo-Jun Zhang, Ai-Ling Yan, Jian-Cheng Ren, Zhen-Hua Liu, Hai-Ying Xu, Lei Sun
Summary: The effects of different bagging treatments on table grape cultivars were studied. Transparent and white bags promoted the accumulation of phenolics and monoterpenes, while pink and blue bags showed inhibitory effects.
