由心理耐受性南极内生菌引起的西红植物的代谢变化可能与缓解寒冷压力有关
Giorgio Licciardello1,2,3, Maria Doppler2,4, Carmela Sicher3
1Center Agriculture Food Environment (C3A), University of Trento, San Michele all'Adige, Trento, Italy.
Physiologia plantarum
|May 19, 2024
概括
心理耐受性内性细菌通过调节代谢途径来增强番茄植物的寒冷应激耐受性. 这些细菌刺激有益的二次代谢物的积累,有助于植物在寒冷条件下生存.
科学领域:
- 植物科学 植物科学
- 微生物学 微生物学
- 生物化学 生物化学
背景情况:
- 气候变化导致温和的冬季和温暖的春天,导致植物过早发育和增加寒冷压力风险.
- 番茄植物容易受到寒冷压力,有益的微生物可以提高它们的耐受性.
- 细菌内细胞在番茄植物中赋予寒冷应激耐受性的机制尚不清楚.
研究的目的:
- 为了研究在寒冷压力下由心理耐受性内菌诱导的西红植物的代谢变化.
- 为了确定特定的化合物,与冷应激缓解在接种的番茄植物相关.
主要方法:
- 番茄种子被接种了来自南极的内生菌 (Ewingella sp. 和 Pseudomonas sp.) 的类型. 或Paraburkholderia phytofirmans PsJN,与模拟注射植物作为对照.
- 植物受到寒冷压力 (4°C 7天),并在压力和恢复期间 (25°C 2和4天) 后分析代谢组成.
- 代谢分析的重点是脂质过氧化标记物,化合物和氨酸衍生代谢物.
主要成果:
- 细菌注射的植物在寒冷压力下显示了降低的甲基,氨酸,酸和p-酸水平,表明脂质过氧化减少和刺激代谢.
- 在冷应激期间,在注射植物中观察到化合物,氨酸衍生型二和其他氨酸衍生物的积累.
- 特定的化合物,如4-基酸和酸,以及氨酸衍生型二,被确定为可能参与缓解寒冷压力.
结论:
- 心理耐受性内性细菌有效地重编程番茄植物中的多代谢.
- 这些细菌刺激二次代谢物的积累,这对于缓解寒冷压力至关重要.
- 这些发现突显了内菌在提高植物对气候变化引起的寒冷压力的抵抗力方面的潜力.
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