AINTEGUMENTA negatively regulates age-dependent leaf senescence downstream of AUXIN RESPONSE FACTOR 2 in Arabidopsis thaliana
AINTEGUMENTA negatively regulates age-dependent leaf senescence downstream of AUXIN RESPONSE FACTOR 2 in Arabidopsis thaliana
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AINTEGUMENTA 负向调节拟南芥中生长素响应因子 2 下游的年龄依赖性叶片衰老
DOI：
10.5511/plantbiotechnology.16.0222a
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发表时间：
2016-06-01
影响因子：
1.6
通讯作者：
Zhuoma, Qiangjiu
中科院分区：
文献类型：
--
作者：
Feng, Guanping;Xu, Qiang;Zhuoma, Qiangjiu
叶片衰老为叶片发育的最后阶段，受诸多内外因素调控。作为生长素信号的抑制因子，生长素响应因子2（ARF2）参与多种发育过程的调控，但其如何正向调控叶片衰老的功能机制尚未明确界定。在此，我们研究了AP2/ERF转录因子家族成员ANT（AINTEGUMENTA），发现ANT在延长叶片寿命方面发挥重要作用。功能缺失的ant - 1突变体表现出叶片早衰，而ANT的过表达导致叶片衰老延迟。遗传分析表明，ANT的缺失抑制了arf2 - 5突变体中叶片衰老延迟的表型。综上所述，我们的研究结果表明ANT参与ARF2下游的叶片衰老调控。
Leaf senescence is the final stage of leaf development and is regulated by many internal and external cues. As a repressor of auxin signaling, AUXIN RESPONSE FACTOR 2 (ARF2) is involved in control of several developmental processes, but its functional mechanism on how to positively regulate leaf senescence has not been clearly defined. Here, we examined AINTEGUMENTA (ANT), a member of the AP2/ERF transcription factor family, and found that ANT played an important role in extending leaf longevity. The loss-of-function ant-1 mutant showed premature leaf senescence, whereas overexpression of ANT led to a delay in leaf senescence. Genetic analysis revealed that loss of ANT repressed the delayed leaf senescence phenotype in arf2-5 mutant. Taken together, our results suggest that ANT is involved in regulation of leaf senescence downstream of ARF2.