Page 197 - 《广西植物》2025年第10期
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10 期 黄金龙等: 马尾松 PmWRKY2 和 PmWRKY6 基因生物信息学及表达分析 1 9 2 7
Abstract: The WRKY family is one of the largest families of transcription factors in higher plants. Previous studies have
found that WRKY family genes play an important role in the response of Pinus massoniana to insect pestsꎬ growth and
developmentꎬ and drought stress. In order to further study the biological function of WRKY family genes and the response
to exogenous hormonesꎬ the bioinformatics characteristics of PmWRKY2 and PmWRKY6 genes were analyzedꎬ and the
expression patterns of PmWRKY2 and PmWRKY6 genes under exogenous hormones treatment such as abscisic acid
(ABA)ꎬ salicylic acid (SA)ꎬ methyl jasmonate (MeJA) and gibberellin acid (GA) and calcium ion were studied by
qPCR. The results were as follows: (1) PmWRKY2 and PmWRKY6 proteins encoded 667 and 575 amino acidsꎬ
respectivelyꎬ and were subcellularly located in the nucleusꎬ and the N ̄terminus of the two genes contained a highly
conserved WRKYGQK heptapeptide structureꎬ and the C ̄terminus contained a zinc finger structureꎬ which belonged to
the WRKY transcription factor family. (2) In terms of evolutionary relationshipꎬ PmWRKY2 protein and PmWRKY6
protein were most closely related to PtXG20020.1 and Pt2G29990.1 proteins from P. tabuliformisꎬ which were also
gymnosperm. (3) Compared with CKꎬ the expression of PmWRKY2 and PmWRKY6 genes could be significantly induced
2+
by the four hormone treatments and the corresponding Ca treatmentꎬ and their expression levels reached the peak in the
2+
late treatment period. Under Ca treatment aloneꎬ both genes showed an expression trend of first decreasing and the
increasingꎬ in which the expression of PmWRKY2 gene was significantly induced in the early stageꎬ and there was no
significant difference between the expression of PmWRKY2 gene in the late treatment and the CKꎬ while the expression
level of PmWRKY6 gene was significantly higher than that of the CK during the whole treatment. These results show that
both PmWRKY2 and PmWRKY6 genes can respond to different exogenous signaling substancesꎬ but the expression
patterns are different.
Key words: Pinus massonianaꎬ PmWRKY2ꎬ PmWRKY6ꎬ bioinformaticsꎬ expression pattern
转录因子(transcription factorꎬ TF)又称为反式 例如ꎬGmWRKY54 基 因 通 过 激 活 脱 落 酸 ( abscisic
2+
作用因子ꎬ通过与下游目标基因顺式作用元件结 acidꎬABA)和 Ca 信号通路增强气孔关闭以减少
合来激活或抑制基因表达ꎬ在植物生长发育和响 水分流失ꎬ从而增强大豆( Glycine max) 的抗旱性
应外界环境中发挥重要作用( Porto et al.ꎬ 2014)ꎮ (Wei et al.ꎬ 2019)ꎻ AcWRKY40 可通过调节乙烯
植物中含有多种转录因子家族ꎬ其中 WRKY 家族 (ethyleneꎬET)生物合成相关基因的表达来调控猕
是近年来发现的植物中特有、最大且重要的转录 猴桃(Actinidia chinensis)果实成熟过程(Gan et al.ꎬ
因子家族之一ꎮ WRKY 家族基因保守结构域由 60 2021)ꎻOsWRKY53 和 OsWRKY70 均能正调控水稻
个氨基酸组成ꎬ在 N 端含有 WRKYGQK 高度保守 (Oryza sativa)体内胰蛋白酶抑制剂含量ꎬ从而增
七肽结构ꎬ以及 C 端含有锌指结构(Rushton et al.ꎬ 强水稻对二化螟( Chilo suppressalis) 的抗性( Hu et
2010)ꎬ根据 WRKY 保守七肽结构域数目和锌指结 al.ꎬ 2015ꎻ Li et al.ꎬ 2015)ꎮ 在松树中ꎬWRKY 家
构类型ꎬ将 WRKY 转录因子家族分为 I、Ⅱ和Ⅲ家 族基因在马尾松侧芽发育(Chen et al.ꎬ 2021b)、萜
族( Eulgem et al.ꎬ 2000 )ꎮ Ishiguro 和 Nakamura 类化合物和类黄酮生物合成( Mao et al.ꎬ 2021) 中
(1994)首次从甘薯( Ipomoea batatas) 中分离到编 发挥重要作用ꎻ此外ꎬWRKY 家族基因还参与了松
码 WRKY 蛋 白 的 SPF1 ( Sweet ̄Potato Factor ̄1) 基 树非生物逆境胁迫响应过程ꎬ如长白落叶松( Larix
因ꎮ 随着分子生物学技术的不断发展ꎬ目前众多 olgensis)LoWRKY1 受干旱和外源 ABA 显著诱导表
植物的 WRKY 家族基因陆续得到鉴定ꎬ包括杨树 达( 王 乃 锐 等ꎬ 2022 )ꎬ 分 别 过 表 达 马 尾 松
(Populus trichocarpa )105 个( He et al.ꎬ 2012)、马 PmWRKY30 和 PmWEKY164 能增强转基因烟草的
尾松(Pinus massoniana) 43 个( Sun et al.ꎬ 2022)、 耐 旱 性 和 耐 磷 性 ( 王 庆 竹 等ꎬ 2019ꎻ Sun et al.ꎬ
杉 木 ( Cunninghamia lanceolata) 44 个 ( 曾 铭 等ꎬ 2022)ꎻ在生物胁迫方面ꎬ赤松( Pinus densiflora) 在
2019)ꎮ 感 染 松 材 线 虫 ( Bursaphelenchus xylophilus ) 后
WRKY 转录因子家族在植物生长发育调控和 WRKY 家族基因显著上调表达ꎬ表明 WRKY 家族
生物 或 非 生 物 胁 迫 响 应 过 程 中 发 挥 重 要 作 用 基因可能 参 与 松 材 线 虫 的 胁 迫 响 应 ( Lee et al.ꎬ
(Eulgem & Somssichꎬ 2007ꎻ Chen et al.ꎬ 2021)ꎮ 2024)ꎮ Chen 等(2021a) 发现 PmWRKY31 基因通

