[1] 陈俊愉. 中国梅花[M]. 海口: 中国海南出版社, 1996.
[2] 陈俊愉. 中国梅花品种图志[M]. 北京: 中国林业出版社, 1989.
[3] 张启翔. 梅花及其杂交种根系抗寒性研究初报[J]. 北京林业大学学报, 1992, 14(增刊 4): 83 − 86.

ZHANG Qixiang. A preliminary study on cold resistance of root system of Mei and its hybrid cultivars [J]. J Beijing For Univ, 1992, 14(suppl 4): 83 − 86.
[4] 包满珠, 陈俊愉. 中国梅的变异与分布研究[J]. 园艺学报, 1994, 21(1): 81 − 86.

BAO Manzhu, CHEN Junyu. Studies on the variation and distribution of Prunus mume Sieb. et Zucc. [J]. Acta Hortic Sin, 1994, 21(1): 81 − 86.
[5] 包满珠. 我国川、滇、藏部分地区梅树种质资源及其开发利用[J]. 华中农业大学学报, 1993, 12(5): 498 − 501.

BAO Manzhu. The germplasm resources and exploitation of Prunus mume in partial area of Sichuan, Yunnan and Tibet of China [J]. J Huazhong Agric Univ, 1993, 12(5): 498 − 501.
[6] 王白坡, 钱银才, 沈湘林, 等. 实生梅开花结果特性的研究[J]. 浙江林学院学报, 1992, 9(1): 6 − 13.

WANG Baipo, QIAN Yincai, SHEN Xianglin, et al. Study on flowering and fruiting charaeters of seedling-mumeplant [J]. J Zhejiang For Coll, 1992, 9(1): 6 − 13.
[7]

EULGEM T, RUSHTON P J, ROBATZEK S, et al. The WRKY superfamily of plant transcription factors [J]. Trends Plant Sci, 2000, 5(5): 199 − 206.
[8]

VIVES-PERIS V, MARMANEU D, GÓMEZ-CADENAS A, et al. Characterization of Citrus WRKY transcription factors and their responses to phytohormones and abiotic stresses [J]. Biol Plant, 2018, 62(1): 33 − 44.
[9]

PAN Linjie, JIANG Ling. Identification and expression of the WRKY transcription factors of Carica papaya in response to abiotic and biotic stresses [J]. Mol Boil Rep, 2014, 41: 1215 − 1225.
[10]

NIU Canfang, WEI Wei, ZHOU Qiqun, et al. Wheat WRKY genes TaWRKY2 and TaWRKY19 regulate abiotic stress tolerance in transgenic Arabidopsis plants [J]. Plant Cell Environ, 2012, 35: 1156 − 1170.
[11]

YOKOTANI N, SATO Y, TANABE S, et al. WRKY76 is a rice transcriptional repressor playing opposite roles in blast disease resistance and cold stress tolerance [J]. J Exp Bot, 2013, 64(6): 5085 − 5097.
[12]

LIU Guoyin, LI Bing, LI Xiang, et al. MaWRKY80 positively regulates plant drought stress resistance through modulation of abscisic acid and redox metabolism [J]. Plant Physiol Biochem, 2020, 156: 155 − 166.
[13]

YAN H R, JIA H H, CHEN X B, et al. The cotton WRKY transcription factor GhWRKY17 functions in drought and salt stress in transgenic Nicotiana benthamiana through ABA signaling and the modulation of reactive oxygen species production [J]. Plant Cell Physiol, 2014, 55(12): 2060 − 2076.
[14]

ZHANG Qixiang, CHEN Wenbin, SUN Lidan, et al. The genome of Prunus mume [J]. Nat Commun, 2012, 3: 1318. doi: 10.1038/ncomms2290.
[15]

BAO Fei, DING Anqi, CHENG Tangren, et al. Genome-wide analysis of members of the WRKY gene family and their cold stress response in Prunus mume [J]. Genes, 2019, 10(11): 911. doi: 10.3390/genes10110911.
[16]

PENG Ting, GUO Cong, YANG Jie, et al. Overexpression of Mei (Prunus mume) CBF gene confers tolerance to freezing and oxidative stress in Arabidopsis [J]. Plant Cell Tissue Organ Cult, 2016, 126(3): 373 − 385.
[17] 李元元, 高志强, 曹清河. 甘薯SPF1转录因子的生物信息学分析[J]. 江苏农业学报, 2017, 33(4): 760 − 767.

LI Yuanyuan, GAO Zhiqiang, CAO Qinghe. Bioinformatics analysis of SPF1 transcription factor of sweet potato [J]. Jiangsu Agric Sci, 2017, 33(4): 760 − 767.
[18]

CHEN Lin, YANG Yang, LIU Can, et al. Characterization of WRKY transcription factors in Solanum lycopersicum reveals collinearity and their expression patterns under cold treatment [J]. Biochem Biophys Res Commun, 2015, 464(6): 962 − 968.
[19]

WEI Kaifa, CHEN Juan, CHEN Yanfeng, et al. Molecular phylogenetic and expression analysis of the complete WRKY transcription factor family in maize [J]. DNA Res, 2012, 19: 153 − 164.
[20]

MENG Dong, LI Yuanyuan, BAI Yang, et al. Genome-wide identification and characterization of WRKY transcriptional factor family in apple and analysis of their responses to waterlogging and drought stress [J]. Plant Physiol Biochem, 2016, 103: 71 − 83.
[21]

ROSS C A, LIU Yue, SHEN Qingxi J. The WRKY gene family in rice (Oryza sativa) [J]. J Integr Plant Biol, 2007, 49(6): 827 − 836.
[22]

SUN Chuanxin, SARA P, OLSSON H, et al. A novel WRKY transcription factor, SUSIBA2, participates in sugar signaling in barley by binding to the sugar-responsive elements of the iso1 promoter [J]. Plant Cell, 2003, 15(9): 2076 − 2092.
[23] 罗昌国, 渠慎春, 张计育, 等. 湖北海棠MhWRKY40b 在几种胁迫下的表达分析[J]. 园艺学报, 2013, 40(1): 1 − 9.

LUO Changguo, QU Shenchun, ZHANG Jiyu, et al. Expression analysis of Malus hupehensis (Pamp) Rehd. MhWRKY40b gene in response to several stresses [J]. Acta Hortic Sin, 2013, 40(1): 1 − 9.
[24]

ZHANG Ying, YU Hongjun, YANG Xueyong, et al. CsWRKY46, a WRKY transcription factor from cucumber, confers cold resistance in transgenic-plant by regulating a set of cold-stress responsive genes in an ABA-dependent manner [J]. Plant Physiol Biochem, 2016, 108: 478 − 487.
[25]

ZHU Hong, ZHOU Yuanyuan, ZHAI Hong, et al. A novel sweetpotato WRKY transcription factor, IbWRKY2, positively regulates drought and salt tolerance in transgenic Arabidopsis [J]. Biomolecules, 2020, 10: 506. doi: 10.3390/biom10040506.
[26] 王官凤, 吕兵兵, 王安虎, 等. 苦荞抗旱相关转录因子基因FtWRKY10的克隆及功能鉴定[J]. 农业生物技术学报, 2020, 28(4): 629 − 644.

WANG Guanfeng, LÜ Bingbing, WANG Anhu, et al. Cloning and functional identification of drought resistance related transcription factor gene FtWRKY10 from tartary buckwheat (Fagopyrum tataricum) [J]. J Agric Biotechnol, 2020, 28(4): 629 − 644.
[27]

ZHANG Youzhi, LI Yaping, HASSAN M J, et al. Indole-3-acetic acid improves drought tolerance of white clover via activating auxin, abscisic acid and jasmonic acid related genes and inhibiting senescence genes [J]. BMC Plant Biol, 2020, 20: 150. doi: 10.1186/s12870-020-02354-y.
[28]

JIANG Wenbo, YU Diqiu. Arabidopsis WRKY2 transcription factor mediates seed germination and postgermination arrest of development by abscisic acid [J]. BMC Plant Biol, 2009, 9: 96. doi: 10.1186/1471-2229-9-96.