植物生长素响应因子MdARF2基因介导苹果对ABA和盐胁迫的响应

doi:10.1016/S2095-3119(21)63843-1

Journal of Integrative Agriculture ›› 2022, Vol. 21 ›› Issue (8): 2264-2274.DOI: 10.1016/S2095-3119(21)63843-1

所属专题：园艺-分子生物合辑Horticulture — Genetics · Breeding

植物生长素响应因子MdARF2基因介导苹果对ABA和盐胁迫的响应

收稿日期:2021-06-01 接受日期:2021-09-24 出版日期:2022-08-01 发布日期:2021-09-24

Auxin response factor gene MdARF2 is involved in ABA signaling and salt stress response in apple

WANG Chu-kun¹, ZHAO Yu-wen¹, HAN Peng-liang², YU Jian-qiang¹, HAO Yu-jin^1†, XU Qian³, YOU Chun-xiang¹, HU Da-gang¹

¹National Key Laboratory of Crop Biology/Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticultural Science and Engineering, Shandong Agricultural University, Tai’an 271018, P.R.China
²State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, P.R.China
³State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an 271018, P.R.China

Received:2021-06-01 Accepted:2021-09-24 Online:2022-08-01 Published:2021-09-24
About author:WANG Chu-kun, E-mail: emilywtr@163.com; Correspondence HU Da-gang, E-mail: fap_296566@163.com; YOU Chun-xiang, Tel: +86-538-8246151, Fax: +86-538-8242364, E-mail: youchunxiang@126.com; † Deceased.
Supported by:
This work was supported by the National Key Research and Development Program of China (2018YFD1000200), the National Natural Science Foundation of China (31972375 and 31801330), and the Outstanding Youth Fund of Shandong Province, China (ZR2020YQ25 and SDAIT-06-03).

摘要/Abstract

摘要：

本研究从“Royal Gala” (Malus×domestica Borkh.) 皇家嘎啦苹果品种中克隆了一个生长素应答因子基因MdARF2 (HF41569)。系统发育分析表明，ARF2蛋白在不同物种间高度保守，MdARF2与PpARF2的亲缘关系最接近，但两者在DNA水平上存在差异。MdARF2蛋白包含三个典型的保守结构域:B3-DNA结合结合域、Auxin_resp结构域和AUX_IAA结构域。亚细胞定位分析表明，MdARF2定位于细胞核。蛋白质的三维结构预测表明，MdARF2与AtARF2高度相似，包含螺旋、折叠和无规则卷曲。MdARF2启动子含有顺式作用元件，用于响应各种胁迫、环境和激素信号。表达分析表明，MdARF2广泛表达于苹果各组织中，在根部表达量最高。通过对MdARF2转基因苹果愈伤组织的功能分析表明，MdARF2可以降低苹果对ABA信号的敏感性，增强其耐盐性。综上所述，本研究为研究arf对非生物胁迫的调控提供了新的依据。

Abstract:

Auxin response factors (ARFs) play key roles throughout the whole process of plant growth and development, and mediate auxin response gene transcription by directly binding with auxin response elements (AuxREs). However, their functions in abiotic stresses are largely limited, especially in apples. Here, the auxin response factor gene MdARF2 (HF41569) was cloned from apple cultivar ‘Royal Gala’ (Malus×domestica Borkh.). Phylogenetic analysis showed that ARF2 proteins are highly conserved among different species and MdARF2 is the closest relative to PpARF2 of Prunus persica, but they differ at the DNA level. MdARF2 contains three typical conserved domains including the B3 DNA-binding domain, Auxin_resp domain and AUX_IAA domain. The subcellular localization demonstrated that MdARF2 is localized in the nucleus. The three-dimensional structure prediction of the proteins showed that MdARF2 is highly similar with AtARF2, and they contain helices, folds, and random coils. The promoter of MdARF2 contains cis-acting elements which respond to various stresses, as well as environmental and hormonal signals. Expression analysis showed that MdARF2 is widely expressed in all tissues of apple, with the highest expression of MdARF2 in root. Functional analysis with a series of MdARF2 transgenic apple calli indicated that MdARF2 can reduce the sensitivity to ABA signaling and enhance salt tolerance in apple. In summary, the results of this research provide a new basis for studying the regulation of abiotic stresses by ARFs.

Key words: ABA signaling , apple , MdARF2 , salt stress

. 植物生长素响应因子MdARF2基因介导苹果对ABA和盐胁迫的响应[J]. Journal of Integrative Agriculture, 2022, 21(8): 2264-2274.

WANG Chu-kun, ZHAO Yu-wen, HAN Peng-liang, YU Jian-qiang, HAO Yu-jin, XU Qian, YOU Chun-xiang, HU Da-gang. Auxin response factor gene MdARF2 is involved in ABA signaling and salt stress response in apple[J]. Journal of Integrative Agriculture, 2022, 21(8): 2264-2274.

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植物生长素响应因子MdARF2基因介导苹果对ABA和盐胁迫的响应

Auxin response factor gene MdARF2 is involved in ABA signaling and salt stress response in apple

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