Strigolactones, host recognition signals for root parasitic plants and arbuscular mycorrhizal fungi, from Fabaceae plants
Strigolactones, host recognition signals for root parasitic plants and arbuscular mycorrhizal fungi, from Fabaceae plants
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DOI：
10.1111/j.1469-8137.2008.02462.x
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发表时间：
2008-01-01
期刊：
影响因子：
9.4
通讯作者：
Yoneyama, Koichi
中科院分区：
文献类型：
--
作者：
Yoneyama, Kaori;Xie, Xiaonan;Yoneyama, Koichi
根寄生植物和丛枝菌根真菌（AM真菌）都是利用植物根系分泌的白色脚金内酯作为信号分子与寄主植物进行最初的通讯，从而分别开始寄生和互惠共生。（白羽扇豆），AM真菌的非宿主，通过比较发芽刺激剂在反相高效液相色谱（HPLC）上的保留时间与标准品的保留时间，并使用串联质谱进行表征所有被检测的植物物种都被发现分泌已知的独脚金内酯，如列当醇、列当醇乙酸酯和5-脱氧独脚金醇，表明这些独脚金内酯广泛分布于豆科中。值得注意的是，即使是非真菌营养型L。白三叶草分泌列当醇、列当醇乙酸酯、5-脱氧独脚金醇和新的萌发刺激物，与缺磷促进独脚金内酯分泌的真菌营养型豆科植物红车轴草相反，缺磷和缺氮均不增加这些独脚金内酯的分泌。阿不思因此，独脚金内酯产生和/或分泌的调节似乎与植物的营养获取策略密切相关。
Both root parasitic plants and arbuscular mycorrhizal (AM) fungi take advantage of strigolactones, released from plant roots as signal molecules in the initial communication with host plants, in order to commence parasitism and mutualism, respectively.In this study, strigolactones in root exudates from 12 Fabaceae plants, including hydroponically grown white lupin (Lupinus albus), a nonhost of AM fungi, were characterized by comparing retention times of germination stimulants on reverse-phase high-performance liquid chromatography (HPLC) with those of standards and by using tandem mass spectrometry (LC/MS/MS).All the plant species examined were found to exude known strigolactones, such as orobanchol, orobanchyl acetate, and 5-deoxystrigol, suggesting that these strigolactones are widely distributed in the Fabaceae. It should be noted that even the nonmycotrophic L. albus exuded orobanchol, orobanchyl acetate, 5-deoxystrigol, and novel germination stimulants.By contrast to the mycotrophic Fabaceae plant Trifolium pratense, in which phosphorus deficiency promoted strigolactone exudation, neither phosphorus nor nitrogen deficiency increased exudation of these strigolactones in L. albus. Therefore, the regulation of strigolactone production and/or exudation seems to be closely related to the nutrient acquisition strategy of the plants.