莲藕
生物
细胞分裂素
共生
细菌
结核(地质)
突变体
根瘤
根瘤菌
寄主(生物学)
植物
细胞生物学
基因
生态学
遗传学
生长素
古生物学
作者
Takashi Soyano,Akira Akamatsu,Naoya Takeda,Masaaki K. Watahiki,Tatsuaki Goh,Nao Okuma,Norio Suganuma,Mikiko Kojima,Yumiko Takebayashi,Hitoshi Sakakibara,Keiji Nakajima,Masayoshi Kawaguchi
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2024-07-18
卷期号:385 (6706): 288-294
标识
DOI:10.1126/science.adk5589
摘要
Host plants benefit from legume root nodule symbiosis with nitrogen-fixing bacteria under nitrogen-limiting conditions. In this interaction, the hosts must regulate nodule numbers and distribution patterns to control the degree of symbiosis and maintain root growth functions. The host response to symbiotic bacteria occurs discontinuously but repeatedly at the region behind the tip of the growing roots. Here, live-imaging and transcriptome analyses revealed oscillating host gene expression with approximately 6-hour intervals upon bacterial inoculation. Cytokinin response also exhibited a similar oscillation pattern. Cytokinin signaling is crucial to maintaining the periodicity, as observed in cytokinin receptor mutants displaying altered infection foci distribution. This periodic regulation influences the size of the root region responsive to bacteria, as well as the nodulation process progression.
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