Strigolactones stimulate arbuscular mycorrhizal fungi by activating mitochondria.
Strigolactones stimulate arbuscular mycorrhizal fungi by activating mitochondria.
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DOI：
10.1371/journal.pbio.0040226
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发表时间：
2006-07
期刊：
影响因子：
9.8
通讯作者：
Séjalon-Delmas N
中科院分区：
文献类型：
--
作者：
Besserer A;Puech-Pagès V;Kiefer P;Gomez-Roldan V;Jauneau A;Roy S;Portais JC;Roux C;Bécard G;Séjalon-Delmas N
丛枝菌根真菌与植物根的共生关系是高等植物与微生物之间最古老和最重要的共生关系，然而这些真菌检测植物寄主存在的机制却鲜为人知。以往的研究表明，在AM真菌孢子萌发过程中，根分泌一种能强烈刺激菌丝分枝的分枝因子(BF)。在莲花的BF中，发现了一种植物内酯的活性分子。Strigolactone是寄生植物Striga和Orobanche的发芽刺激剂。在本文中，我们证明了单子叶植物高粱的BF中也含有马立内酯。在低至10−~(13)M的浓度下，链霉内酯能强烈而迅速地刺激AM真菌巨孢子菌的细胞增殖，而其他倍半萜内酯作为寄生杂草的萌发刺激剂则没有这种作用。处理1h内，真菌细胞内线粒体密度增加，形态和运动发生显著变化。Strigolactones对另外两种系统发育较远的AM真菌Glomus inaradices和Gl.克拉罗伊德属。这也与线粒体密度和呼吸的快速增加有关，如Gl所示。插图。我们的结论是，草内酯是重要的根际植物信号，参与刺激AM真菌的共生前生长和寄生植物的萌发。来自高粱的Strigolactones促进多种丛枝菌根真菌的生长，强调了这些分子在植物根和根际共生关系中的重要性。
The association of arbuscular mycorrhizal (AM) fungi with plant roots is the oldest and ecologically most important symbiotic relationship between higher plants and microorganisms, yet the mechanism by which these fungi detect the presence of a plant host is poorly understood. Previous studies have shown that roots secrete a branching factor (BF) that strongly stimulates branching of hyphae during germination of the spores of AM fungi. In the BF of Lotus, a strigolactone was found to be the active molecule. Strigolactones are known as germination stimulants of the parasitic plants Striga and Orobanche. In this paper, we show that the BF of a monocotyledonous plant, Sorghum, also contains a strigolactone. Strigolactones strongly and rapidly stimulated cell proliferation of the AM fungus Gigaspora rosea at concentrations as low as 10 −13 M. This effect was not found with other sesquiterperne lactones known as germination stimulants of parasitic weeds. Within 1 h of treatment, the density of mitochondria in the fungal cells increased, and their shape and movement changed dramatically. Strigolactones stimulated spore germination of two other phylogenetically distant AM fungi, Glomus intraradices and Gl. claroideum. This was also associated with a rapid increase of mitochondrial density and respiration as shown with Gl. intraradices. We conclude that strigolactones are important rhizospheric plant signals involved in stimulating both the pre-symbiotic growth of AM fungi and the germination of parasitic plants. Strigolactones from Sorghum promote growth of multiple arbuscular mycorrhizal fungi, underscoring the importance of these molecules in the symbiotic relationship between plant roots and the rhizosphere.
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影响因子：
--
作者：
Nagahashi, G;Douds, DD
通讯作者：
Douds, DD
影响因子：
4.8
作者：
Clark, JS
通讯作者：
Clark, JS
影响因子：
64.8
作者：
Bais, HP;Prithiviraj, B;Vivanco, JM
通讯作者：
Vivanco, JM
DOI：
10.1039/p19810001734
发表时间：
1981-01-01
期刊：
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1
影响因子：
--
作者：
JOHNSON, AW;GOWDA, G;ROSEBERY, G
通讯作者：
ROSEBERY, G
影响因子：
2.8
作者：
Emechebe, AM;Ahonsi, MO
通讯作者：
Ahonsi, MO