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植物研究 ›› 2022, Vol. 42 ›› Issue (4): 592-601.doi: 10.7525/j.issn.1673-5102.2022.04.009

• 遗传与育种 • 上一篇    下一篇

白桦BpPIN3基因启动子序列及应答特性分析

陈坤, 方功桂, 穆怀志, 姜静()   

  1. 东北林业大学林木遗传育种国家重点实验室,哈尔滨 150040
  • 收稿日期:2021-11-22 出版日期:2022-07-20 发布日期:2022-07-15
  • 通讯作者: 姜静 E-mail:jiangjing1960@126.com
  • 作者简介:陈坤(1995—),男,博士研究生,主要从事林木遗传育种方面的研究。
  • 基金资助:
    “十四五”国家重点研发计划项目(2021YFD2200102);国家自然科学基金项目(32001333)

Analysis of the Promoter Sequence and Response Characteristics of the BpPIN3 gene in Betula platyphylla

Kun CHEN, Gonggui FANG, Huaizhi MU, Jing JIANG()   

  1. State Key Laboratory of Forest Tree Genetics and Breeding,Northeast Forestry University,Harbin 150040
  • Received:2021-11-22 Online:2022-07-20 Published:2022-07-15
  • Contact: Jing JIANG E-mail:jiangjing1960@126.com
  • About author:CHEN Kun(1995—),male,Ph.D,mainly engaged in tree genetics and breeding research.
  • Supported by:
    “Fourteen Five” National Key Research and Development Program(2021YFD2200102);Natural Science Foundation of China(32001333)

摘要:

PIN蛋白家族作为植物中重要的生长素外排载体家族,在植物生长和发育过程中表现出广泛的生理效应。为了进一步了解BpPIN3的功能,探究其在白桦(Betula platyphylla)发育过程中及其对不同激素信号和非生物胁迫的响应,采用生物信息学方法分析白桦BpPIN3启动子序列。以1年生和2年生白桦无性系苗木的根、茎、叶和顶芽为材料进行组织部位表达模式分析。以白桦幼苗为材料,用100 μmol·L-1生长素(IAA)、100 μmol·L-1赤霉素(GA3)、200 μmol·L-1脱落酸(ABA)和长光照条件下分别进行激素诱导和光胁迫处理,并取激素处理后0、2、4、8、16、24、48 h以及光胁迫后0、1、3、6,12、24、48、72 h时的白桦叶片和根提取RNA,利用qRT-PCR技术分析BpPIN3基因的表达情况。结果显示:BpPIN3启动子序列包含赤霉素、脱落酸、茉莉酸甲酯等不同类型的生长素响应元件,以及多个与逆境相关的顺式调控元件。BpPIN3在不同生长年份白桦的多个组织部位都有表达,尤其在叶片中表达量较高,并且所有组织部位中BpPIN3第二年的表达量均高于第一年。BpPIN3基因在不同处理条件下,不同部位间的相对表达量的变化存在一定差异,IAA及GA能够诱导白桦叶片组织细胞中的BpPIN3上调表达;而在ABA处理下除16、48 h外,BpPIN3基因表现出与IAA处理下相反的表达模式。在根组织中,IAA、GA3及ABA均能诱导BpPIN3的表达。在叶片组织中,遮光胁迫诱导了BpPIN3基因的表达;在根组织中,随着处理时间的推移,12 h开始BpPIN3基因的相对表达量均显著高于对照(0 h)。根据试验结果,推测BpPIN3基因在白桦生长发育过程,以及IAA、GA3和ABA信号转导途径和植物光响应过程中发挥重要调控作用。

关键词: 白桦, BpPIN3基因, 植物激素, 光响应

Abstract:

As an important auxin efflux carrier family in plants, PIN protein family shows extensive physiological effects in plant growth and development. In order to further understand the function of BpPIN3 and explore its response to different hormone signals and abiotic stresses during Betula platyphylla development,the BpPIN3 promoter sequence was analyzed by bioinformatics methods. Tissue expression patterns of roots, stems, leaves and apical buds of annual and biennial B. platyphylla clones were analyzed respectively. The seedlings were used as conduct hormone induction and light stress treatment with 100 μmol·L-1 auxin(IAA), 100 μmol·L-1 gibberellin(GA3), 200 μmol·L-1 abscisic acid(ABA) and long light conditions, respectively. RNA was extracted from leaves and roots of B. platyphylla at 0, 2, 4, 8, 16, 24 and 48 h after hormone treatment and at 0, 1, 3, 6, 12, 24, 48 and 72 h after light stress, and qRT-PCR was used to analyze the expression of BpPIN3. The results showed that the BpPIN3 promoter sequence contained different types of auxin response elements such as gibberellin, abscisic acid, and methyl jasmonate, as well as multiple stress-related cis-regulatory elements. BpPIN3 was expressed in many tissues of birch in different growth years, especially in leaves, and the expression of BpPIN3 in the second year was higher than that in the first year. The relative expression of BpPIN3 gene was different in different parts under different treatment conditions. IAA and GA3 could induce the up-regulation of BpPIN3 expression in leaf. Under ABA treatment, except for 16 and 48 h, the expression pattern of BpPIN3 gene was opposite to that under IAA treatment. IAA, GA3 and ABA could induce the expression of BpPIN3 in root, but shading stress induced the expression of BpPIN3 gene in leaf, the relative expression of BpPIN3 gene was significantly higher than that of the control(0 h) from 12 h in root, IAA, GA3 and ABA could induce the expression of BpPIN3 in root, shading stress induced the expression of BpPIN3 gene in leaf; the relative expression of BpPIN3 gene was significantly higher than that of the control (0 h)from 12 h in root. The results suggested that BpPIN3 gene played the important regulatory role in the growth and development of B. platyphylla,and the signal transduction pathways of IAA, GA3 and ABA and plant light response.

Key words: Betula platyphylla, BpPIN3, plant hormones, light response

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